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A jet pack, rocket belt, or rocket pack is a device worn on the back which uses jets of gas or liquid to propel the wearer through the air. The concept has been present in science fiction for almost a century and became widespread in the 1960s. Real jet packs have been developed using a variety of mechanisms, but their uses are much more limited than their fictional counterparts because of the challenges of the Earth's atmosphere, gravity, the low energy density of utilisable fuels, and the human body not being suited to flight, and they are principally used for stunts. A practical use for the jet pack has been in extra-vehicular activities for astronauts because of the apparent weightlessness and lack of friction-creating atmosphere in orbit. The term jet suit is used for a system incorporating a jet pack and associated jets attached to the arms to increase manoeuvrability (e.g. the Daedalus Flight Pack).


Overview

In the most general terms, a jet pack is a wearable device which allows the user to fly by providing thrust. With the exception of use in a
microgravity The term micro-g environment (also μg, often referred to by the term microgravity) is more or less synonymous with the terms ''weightlessness'' and ''zero-g'', but emphasising that g-forces are never exactly zero—just very small (on the I ...
environment, this thrust must be upwards so as to overcome the force of gravity, and must be enough to overcome the weight of the user, the jet pack itself and its fuel. This necessarily requires the jet pack to continually push mass in a downwards direction. While some designs have power and/or mass supplied from an external, ground-based source, untethered flight requires all of a flight's fuel to be carried within the pack. This results in problems relating to the overall mass ratio, which limits the maximum flight time to a few minutes, rather than the sustained flight envisaged in science fiction.


Liquid-fuelled rocket pack


Andreyev: oxygen-and-methane, with wings

The first pack design was developed in 1919 by the Russian inventor Alexander Andreev. The project was well regarded by
Nikolai Rynin Nikolai Alekseevich Rynin (23 December 1887 – 28 July 1942) was a Russian civil engineer, teacher, aerospace researcher, author, historian, and promoter of space travel. Career Rynin began his career in civil engineering, working in the ra ...
and technology historians Yu. V. Biryukov and S. V. Golotyuk. Later it was issued a patent but apparently was not built or tested. It was oxygen-and- methane-powered (likeliest a rocket) with wings each roughly long.


Hydrogen peroxide-powered rocket packs

A hydrogen peroxide-powered engine is based on the decomposition reaction of hydrogen peroxide. Nearly pure (90% in the Bell Rocket Belt) hydrogen peroxide is used. Pure hydrogen peroxide is relatively stable, but in contact with a catalyst (for example, silver) it decomposes into a mixture of
superheated steam Superheated steam is steam at a temperature higher than its vaporization point at the absolute pressure where the temperature is measured. Superheated steam can therefore cool (lose internal energy) by some amount, resulting in a lowering of its ...
and oxygen in less than 1/10
millisecond A millisecond (from '' milli-'' and second; symbol: ms) is a unit of time in the International System of Units (SI) equal to one thousandth (0.001 or 10−3 or 1/1000) of a second and to 1000 microseconds. A unit of 10 milliseconds may be called ...
, increasing in volume 5,000 times: 2 H2O2 → 2 H2O + O2. The reaction is
exothermic In thermodynamics, an exothermic process () is a thermodynamic process or reaction that releases energy from the system to its surroundings, usually in the form of heat, but also in a form of light (e.g. a spark, flame, or flash), electricity (e ...
, i.e., accompanied by the liberation of much heat (about ), forming in this case a steam-gas mixture at . This hot gas is used exclusively as the reaction mass and is fed directly to one or more jet nozzles. The great disadvantage is the limited operating time. The jet of steam and oxygen can provide significant thrust from fairly lightweight rockets, but the jet has a relatively low exhaust velocity and hence a poor specific impulse. Currently, such rocket belts can only fly for about 30 seconds (because of the limited amount of fuel the user can carry unassisted). A more conventional bipropellant could more than double the specific impulse. However, although the exhaust gases from the peroxide-based engine are very hot, they are still significantly cooler than those generated by alternative propellants. Using a peroxide-based propellant greatly reduces the risk of a fire/explosion which would cause severe injury to the operator. In contrast to, for example, turbojet engines, which mainly expel atmospheric air to produce thrust, rocket packs are far simpler to build than devices using turbojets. The classical rocket pack construction of Wendell Moore can be made under workshop conditions, given good engineering training and a high level of tool-making craftsmanship. The main disadvantages of this type of rocket pack are: * Short duration of flight (a maximum of around 30 seconds). * The high expense of the peroxide propellant. * The inherent dangers of flying below minimum
parachute A parachute is a device used to slow the motion of an object through an atmosphere by creating drag or, in a ram-air parachute, aerodynamic lift. A major application is to support people, for recreation or as a safety device for aviators, who ...
altitude, and hence without any safety equipment to protect the operator if there is an accident or malfunction. * Safely learning how to fly it, given that there are no dual-control training versions. * The sheer difficulty of manually flying such a device. These circumstances limit the sphere of the application of rocket packs to very spectacular public demonstration flights, i.e., stunts; for example, a flight was arranged in the course of the opening ceremony of the
1984 Summer Olympic Games The 1984 Summer Olympics (officially the Games of the XXIII Olympiad and also known as Los Angeles 1984) were an international multi-sport event held from July 28 to August 12, 1984, in Los Angeles, California, United States. It marked the secon ...
in Los Angeles, USA.


Justin Capra's flying backpack

Justin Capră claimed that he invented a "flying rucksack" (Romanian: ''rucsac zburator'') in 1956 in Romania, and, without arousing any apparent interest, informed the American Embassy of his idea. In 1962 a backpack was created at Bell Laboratories, following Justin Capră's prototype. The backpack is now displayed in a museum where it is kept safe.


Jump Belt

In 1958, Garry Burdett and Alexander Bohr, Thiokol Corporation engineers, created a Jump Belt which they named Project Grasshopper. Thrust was created by high-pressure compressed nitrogen. Two small nozzles were affixed to the belt and directed vertically downward. The wearer of the belt could open a valve, letting out nitrogen from the
gas cylinder A gas cylinder is a pressure vessel for storage and containment of gases at above atmospheric pressure. High-pressure gas cylinders are also called ''bottles''. Inside the cylinder the stored contents may be in a state of compressed gas, vapor ...
through the nozzles, which tossed him upward to a height of . While leaning forward, it was possible with the aid of the jump belt's thrust to run at . Later, Burdett and Bohr tested a hydrogen peroxide-powered version. The jump belt was demonstrated by a serviceman in action, but as no financing was forthcoming, there was no further testing.


Aeropack

In 1959
Aerojet General Corporation Aerojet was an American rocket and missile propulsion manufacturer based primarily in Rancho Cordova, California, with divisions in Redmond, Washington, Orange and Gainesville in Virginia, and Camden, Arkansas. Aerojet was owned by GenCorp. ...
won a U.S. Army contract to devise a jet pack or rocket pack. At the start of 1960 Richard Peoples made his first tethered flight with his Aeropack.


U.S. Army interest

The military did not lose interest in this type of flight vehicle. Transport studies of the U.S. Army Transportation Research Command (TRECOM) determined that personal jet devices could have diverse uses: for reconnaissance, crossing rivers, amphibious landing, accessing steep mountain slopes, overcoming
minefield A land mine is an explosive device concealed under or on the ground and designed to destroy or disable enemy targets, ranging from combatants to vehicles and tanks, as they pass over or near it. Such a device is typically detonated automati ...
s, tactical maneuvering, etc. The concept was named "Small Rocket Lift Device", SRLD. Within the framework of this concept the administration concluded a big contract with the Aerojet General company in 1959 to research the possibility of designing an SRLD suitable for army purposes. Aerojet came to the conclusion that the version with the engine running on hydrogen peroxide was most suitable. However, it soon became known to the military that engineer Wendell F. Moore of the
Bell Aerosystems The Bell Aircraft Corporation was an American aircraft manufacturer, a builder of several types of fighter aircraft for World War II but most famous for the Bell X-1, the first supersonic aircraft, and for the development and production of many i ...
company had for several years been carrying out experiments to make a personal jet device. After becoming acquainted with his work, servicemen during August 1960 decided to commission Bell Aerosystems with developing an SRLD. Wendell Moore was appointed chief project engineer.


Bell Textron Rocket Belt

In 1960, the Bell Rocketbelt was presented to the public. The jet of gas was provided by a hydrogen peroxide-powered rocket, but the jet could also be powered by a turbojet engine, a ducted fan, or other kinds of rockets powered by solid fuel, liquid fuel or compressed gas (usually nitrogen). This is the oldest known type of jet pack or rocket pack. One Bell Rocket Belt is on display at the Smithsonian Institution's
National Air and Space Museum The National Air and Space Museum of the Smithsonian Institution, also called the Air and Space Museum, is a museum in Washington, D.C., in the United States. Established in 1946 as the National Air Museum, it opened its main building on the Nat ...
annex, the Steven F. Udvar-Hazy Center, located near Dulles Airport.


RB-2000 Rocket Belt

This was a successor to the Bell Rocket Belt.


Bell Pogo

The Bell Pogo was a small rocket-powered platform that two people could ride on. Its design used features from the Bell Rocket Belt.


Powerhouse Productions Rocketbelt

More commonly known as "The Rocketman", Powerhouse Productions, owned and operated by Kinnie Gibson, manufactures the 30-second flying Rocketbelt (June 1994) and organizes Rocketbelt performances. Since 1983 Powerhouse Productions has performed show flights in over 40 countries such as the Carnival in Rio de Janeiro, Super Bowls, the
Rose Parade The Rose Parade, also known as the Tournament of Roses Parade (or simply the Tournament of Roses), is an annual parade held mostly along Colorado Boulevard in Pasadena, California, United States, on New Year's Day (or on Monday, January 2 if N ...
,
Daytona 500 The Daytona 500 is a NASCAR Cup Series motor race held annually at Daytona International Speedway in Daytona Beach, Florida. It is the first of two Cup races held every year at Daytona, the second being the Coke Zero Sugar 400, and one of three ...
, and the Michael Jackson Dangerous World Tour, as well as many television shows including '' Walker, Texas Ranger'', '' The Fall Guy'' and ''
NCIS NCIS or N.C.I.S. may refer to: Law enforcement * National Criminal Intelligence Service, the predecessor to the Serious Organised Crime Agency of the United Kingdom * Naval Criminal Investigative Service, a United States law enforcement and intelli ...
''. Powerhouse Rocketbelt pilots include stuntman Kinnie Gibson and Dan Schlund.


Jetpack International

Jetpack International made three types of wingless jet packs: A 2 was flown for 34 seconds in Central Park on the 9 April 2007 episode of the '' Today Show'' and sold for $150,000. As of January 2009 their H2O2 jet packs are for demonstration only, not for sale. Details of the likely consumer model "Falcon" were scheduled for an official announcement on May 1, 2012, but the company is currently behind schedule.


Current technology

At the TechCrunch Disrupt conference in 2014, Astro Teller, head of Google X ( Google's research laboratory), said they investigated jet packs but found them too inefficient to be practical, with fuel consumption as high as , and were as loud as a motorcycle, so they decided not to pursue developing them. In recent years, the rocket pack has become popular among enthusiasts, and some have built them for themselves. The pack's basic construction is rather simple, but its flying capability depends on two key parts: the gas generator, and the thrust control valve. The rocket packs being built today are largely based on the research and inventions of Wendell Moore at Bell Helicopter. One of the largest stumbling blocks that would-be rocket pack builders have faced is the difficulty of obtaining concentrated hydrogen peroxide, which is no longer produced by many chemical companies. The few companies that produce high-concentration hydrogen peroxide only sell to large corporations or governments, forcing some amateurs and professionals to set up their own hydrogen peroxide distillation installations. High-concentration hydrogen peroxide for rocket belts was produced by Peroxide Propulsion (Gothenburg, Sweden) from 2004 to 2010, but after a serious accident Peroxide Propulsion stopped making it.


Turbojet packs

Packs with a turbojet engine are fueled with traditional kerosene-based jet fuel. They have higher
efficiency Efficiency is the often measurable ability to avoid wasting materials, energy, efforts, money, and time in doing something or in producing a desired result. In a more general sense, it is the ability to do things well, successfully, and without ...
, greater height and a duration of flight of many minutes, but they are complex in construction and very expensive. Only one working model of this pack was made; it underwent flight tests in the 1960s and at present it no longer flies. Jet packs and rocket packs have much better flight time on a tankful of fuel if they have wings like an aeroplane's.


Bell Jet Flying Belt: wingless

In 1965 Bell Aerosystems concluded a new contract with the
Defense Advanced Research Projects Agency The Defense Advanced Research Projects Agency (DARPA) is a research and development agency of the United States Department of Defense responsible for the development of emerging technologies for use by the military. Originally known as the Adv ...
(DARPA) to develop a jet pack with a turbojet engine. This project was called the "Jet Flying Belt", or simply the "Jet Belt". Wendell Moore and John K. Hulbert, a specialist in gas turbines, worked to design a new turbojet pack. Williams Research Corporation (now Williams International) in
Walled Lake, Michigan Walled Lake is a city in Oakland County in the U.S. state of Michigan. The population was 6,999 at the 2010 census. The city is bordered by Commerce Township on the north and the city of Novi on the south. As a western suburb of Metro Detroit, ...
, designed and built a new turbojet engine to Bell's specifications in 1969. It was called the WR19, had a rated thrust of and weighed . The Jet Belt first flew free on 7 April 1969 at the Niagara Falls Municipal Airport. Pilot Robert Courter flew about in a circle at an altitude of , reaching a speed of . The following flights were longer, up to 5 minutes. Theoretically, this new pack could fly for 25 minutes at velocities up to . In spite of successful tests, the U.S. Army lost interest. The pack was complex to maintain and too heavy. Landing with its weight on their back was hazardous to the pilot, and catastrophic loss of a turbine blade could have been lethal. Thus, the Bell Jet Flying Belt remained an experimental model. On 29 May 1969, Wendell Moore died of complications from a heart attack he had suffered six months earlier, and work on the turbojet pack was ended. Bell sold the sole version of the "Bell pack", together with the patents and technical documentation, to Williams Research Corporation. This pack is now in the Williams International company museum. The "Jet Belt" used a small turbofan engine which was mounted vertically, with its air intake downward. Intake air was divided into two flows. One flow went into the combustion chamber, the other flow bypassed the engine, then mixed with the hot turbine gases, cooling them and protecting the pilot from the high temperatures generated. In the upper part of the engine the exhaust was divided and entered two pipes which led to jet nozzles. The construction of the nozzles made it possible to move the jet to any side. Kerosene fuel was stored in tanks beside the engine. Control of the turbojet pack was similar to the rocket pack, but the pilot could not tilt the entire engine. Maneuvering was by deflecting the nozzles. By inclining levers, the pilot could move the jets of both nozzles forward, back, or sideways. The pilot rotated left/right by turning the left handle. The right handle governed the engine thrust. The jet engine was started with the aid of a powder cartridge. While testing this starter, a mobile starter on a special cart was used. There were instruments to control the power of the engine, and a portable radio to connect and transmit telemetry data to ground-based engineers. On top of the pack was a standard auxiliary landing parachute; it was effective only when opened at altitudes above . This engine was later the basis for the propulsion units of Tomahawk and other
cruise missile A cruise missile is a guided missile used against terrestrial or naval targets that remains in the atmosphere and flies the major portion of its flight path at approximately constant speed. Cruise missiles are designed to deliver a large warhe ...
s.


Visa Parviainen's jet-assisted wingsuit

On 25 October 2005 in Lahti, Finland, Visa Parviainen jumped from a hot air balloon in a wingsuit with two small turbojet
jet engine A jet engine is a type of reaction engine discharging a fast-moving jet of heated gas (usually air) that generates thrust by jet propulsion. While this broad definition can include rocket, Pump-jet, water jet, and hybrid propulsion, the term ...
s attached to his feet. Each turbojet provided approximately of thrust and ran on kerosene (Jet A-1) fuel. Parviainen apparently achieved approximately 30 seconds of horizontal flight with no noticeable loss of altitude.


Yves Rossy's jet wingpack

Swiss ex-military and commercial pilot Yves Rossy developed and built a winged pack with rigid aeroplane-type carbon-fiber wings spanning about and four small kerosene-burning Jetcat P400
jet engine A jet engine is a type of reaction engine discharging a fast-moving jet of heated gas (usually air) that generates thrust by jet propulsion. While this broad definition can include rocket, Pump-jet, water jet, and hybrid propulsion, the term ...
s underneath; these engines are large versions of a type designed for model aeroplanes. He wears a heat-resistant suit similar to that of a
firefighter A firefighter is a first responder and rescuer extensively trained in firefighting, primarily to extinguish hazardous fires that threaten life, property, and the environment as well as to rescue people and in some cases or jurisdictions also ...
or
racing driver Auto racing (also known as car racing, motor racing, or automobile racing) is a motorsport involving the racing of automobiles for competition. Auto racing has existed since the invention of the automobile. Races of various sorts were organise ...
to protect him from the hot jet exhaust. Similarly, to further protect the wearer, the engines are modified by adding a carbon fiber heat shield extending the jet nozzle around the exhaust tail. Rossy claims to be "the first person to gain altitude and maintain a stable horizontal flight thanks to aerodynamic carbon foldable wings", which are folded by hinges at their midpoint. After being lifted to altitude by a plane, he ignites the engines just before he exits the plane with the wings folded. The wings unfold while in free-fall, and he then can fly horizontally for several minutes, landing with the help of a
parachute A parachute is a device used to slow the motion of an object through an atmosphere by creating drag or, in a ram-air parachute, aerodynamic lift. A major application is to support people, for recreation or as a safety device for aviators, who ...
. He achieves true controlled flight using his body and a hand throttle to maneuver; jet wingsuits use small turbojets, but differ from other aircraft in that the fuselage and flight control surfaces consist of a human. The system is said by Rossy to be highly responsive and reactive in flight, to the point where he needs to closely control his head, arm and leg movements to avoid an uncontrolled spin. The engines on the wing must be aligned precisely during set-up, also to prevent instability. An electronic starter system ensures that all four engines ignite simultaneously. In the event of a spin, the wing unit can be detached from the pilot, and pilot and wing unit descend to Earth separately, each with a parachute. Since 2007, Rossy has conducted some of his flight tests from a private airfield, Skydive Empuriabrava, in Empuriabrava ( Girona,
Costa Brava The Costa Brava (, ; "Wild Coast" or "Rough Coast") is a coastal region of Catalonia in northeastern Spain. Whilst sources differ on the exact definition of the Costa Brava, it can be regarded as stretching from the town of Blanes, northeast o ...
), Spain. Rossy's jet pack was exhibited on 18 April 2008 on the opening day of the 35th Exhibition of Inventions at Geneva. Rossy and his sponsors spent over $190,000 to build the device. His first successful trial flight was on 24 June 2004 near Geneva, Switzerland. Rossy has made more than 30 powered flights since. In November 2006 he flew with a later version of his jet pack. On 14 May 2008 he made a successful 6-minute flight from the town of
Bex Bex (; german: Beis; frp, Bés) is a municipality in the canton of Vaud, Switzerland, located in the district of Aigle. It is a few kilometers south of its sister town municipality of Aigle. History Bex is first mentioned in 574 as ''in Bacci ...
near Lake Geneva. He exited a
Pilatus Porter The Pilatus PC-6 Porter is a single-engined STOL utility aircraft designed by Pilatus Aircraft of Switzerland. First flown in 1959, the PC-6 was produced at Pilatus Flugzeugwerke in Stans, Switzerland. It has been built in both piston engine- ...
at with his jet pack. It was the first public demonstration before the world's press. He made effortless loops from one side of the Rhone valley to the other and rose . It has been claimed that the military was impressed and asked for prototypes for the powered wings, but that Rossy kindly refused the request stating that the device was only intended for aviation enthusiasts. On 26 September 2008, Rossy successfully flew across the English Channel from
Calais Calais ( , , traditionally , ) is a port city in the Pas-de-Calais department, of which it is a subprefecture. Although Calais is by far the largest city in Pas-de-Calais, the department's prefecture is its third-largest city of Arras. Th ...
, France, to
Dover Dover () is a town and major ferry port in Kent, South East England. It faces France across the Strait of Dover, the narrowest part of the English Channel at from Cap Gris Nez in France. It lies south-east of Canterbury and east of Maidstone ...
, England, in 9 minutes, 7 seconds. His speed reached during the crossing and was when he deployed the parachute. Since then he has—in several flights—managed to fly in a formation with three military jets and cross the Grand Canyon, but he failed to fly across the Strait of Gibraltar—he made an emergency landing in the water. Rossy appeared in a February 2012 episode of ''Top Gear'' (S18 E5) where he raced against a Skoda rally car driven by Toni Gardemeister with Richard Hammond as a passenger. The race started with the rally car launching down the rally course while Rossy and his support helicopter climbed to reach altitude, upon which he dropped and ignited his engines and followed the course to race the car. Periodical smoke dashes (such as those used by sky-writers or air force display teams) were used to track his progress. In the onboard footage of Rossy flying the tight and twisty course, one can see how he uses his body parts as control surfaces to perform various maneuvers. On 13 October 2015 a show flight was performed in Dubai. Two jet packs operated by Rossy and
Vince Reffet Vincent Reffet (15 September 1984 – 17 November 2020) was a French BASE jumper, skydiver, wingsuit flyer, and jetman. Biography Career Vincent Reffet was a professional parachutist. He completed 17,000 parachute jumps and 1400 BASE jumps. ...
flew in
formation Formation may refer to: Linguistics * Back-formation, the process of creating a new lexeme by removing or affixes * Word formation, the creation of a new word by adding affixes Mathematics and science * Cave formation or speleothem, a secondar ...
with an Airbus A380 jetliner.


Troy Hartman: jet pack and parafoil

In 2008 Troy Hartman started designing a wingless jet pack with two turbojet motors strapped to his back; later he added a
parafoil A parafoil is a nonrigid (textile) airfoil with an aerodynamic cell structure which is inflated by the wind. Ram-air inflation forces the parafoil into a classic wing cross-section. Parafoils are most commonly constructed out of ripstop nylon. T ...
as a wing.


Fritz Unger: jet pack with rigid wings

As of 2013 Fritz Unger in Germany is developing a jet pack called Skyflash with rigid wings about wingspan and two turbojets designed to run on diesel fuel. It is designed for takeoff from the ground using four undercarriage wheels on the front of his chest and abdomen.


JetPack Aviation: wingless jet pack

On 3 November 2015, Jetpack Aviation demonstrated the JB-9 in Upper New York Bay in front of the
Statue of Liberty The Statue of Liberty (''Liberty Enlightening the World''; French: ''La Liberté éclairant le monde'') is a List of colossal sculpture in situ, colossal neoclassical sculpture on Liberty Island in New York Harbor in New York City, in the U ...
. The JB-9 carries of kerosene fuel that burns through two
vectored thrust Thrust vectoring, also known as thrust vector control (TVC), is the ability of an aircraft, rocket, or other vehicle to manipulate the direction of the thrust from its engine(s) or motor(s) to control the attitude or angular velocity of the ve ...
AMT Nike AMT Nike is a small turbojet, used to power model aircraft A model aircraft is a small unmanned aircraft. Many are replicas of real aircraft. Model aircraft are divided into two basic groups: flying and non-flying. Non-flying models are also te ...
jet engines at a rate of per minute for up to ten minutes of flying time, depending on pilot weight. Weight of fuel is a consideration, but it is reported to start with per minute climb rate that doubles as the fuel burns off. While this model has been limited to , the prototype of the JB-10 is reported to fly at over . This is a true jet pack: a backpack that provides jet-powered flight. Most of the volume is the fuel tank, with twin turbine jet engines gimbal-mounted on each side. The control system is identical to the Bell Rocket Belt: tilting the handgrips vectors the thrust – left-right & forward-back – by moving the engines; twisting left hand moves two nozzle skirts for yaw; twisting the right hand counterclockwise increases throttle. Jetpack Aviation was started by Australian businessman David Mayman with the technical knowhow coming from
Nelson Tyler Nelson Tyler is an engineer and inventor. He was the designer and inventor of the PWC, Wetbike. A personal watercraft that rides like a motorcycle. He has developed gyro-stabilized camera systems for aerial use and won an Academy Award in 2005 f ...
, prolific inventor of helicopter-mounted camera stabilizers and one of the engineers that worked on the
Bell Rocketbelt The Bell Rocket Belt is a low-power rocket propulsion device that allows an individual to safely travel or leap over small distances. It is a type of rocket pack. Overview Bell Aerosystems began development of a rocket pack which it called the ...
that was used in the 1984 Olympics. The company now makes two Jetpack models, the JB-10 and the JB-11. They are similar to the JB-9, with upgraded electronics. They both use kerosene/diesel turbojet engines. The JB-10 is designed with two large 200 lb. thrust engines and is described as having an 8 minute flight time, while the slightly-longer duration JB-11 has a 10 minute flight time and uses eight smaller 90 lb. thrust engines. Jetpack Aviation


Flyboard Air

Flyboard Air, invented by Franky Zapata, allows flight up to and can reach . It also has 10 minutes autonomy. Zapata participated with his invention during the 2019 Bastille Day military parade. Three weeks later, he crossed the English Channel with his device in 22 minutes, including a shipboard refueling midway.


Daedalus Flight Pack

This particular innovation saw two jets attached to the back of an exoskeleton, worn by the operator. At the same time, two additional jets were added to the arms, and could be moved with the arms to control movement. It was devised by Richard Browning of Gravity Industries. In September 2020 it was reported that the
Great North Air Ambulance The Great North Air Ambulance Service (GNAAS) is a registered charity and air ambulance based in the United Kingdom. It operates a dedicated helicopter emergency service for the North of England with three aircraft. It serves North Yorkshire, t ...
(GNAA) service was considering using this jet suit to enable paramedics to reach casualties in the mountainous
Lake District The Lake District, also known as the Lakes or Lakeland, is a mountainous region in North West England. A popular holiday destination, it is famous for its lakes, forests, and mountains (or ''fells''), and its associations with William Wordswor ...
, and by March 2022 the operational director of the GNAA, Andy Mawson, had been trained to fly and the service hoped to start using jet suits in summer 2022.


Government


Space

Rocket packs can be useful for
spacewalk Extravehicular activity (EVA) is any activity done by an astronaut in outer space outside a spacecraft. In the absence of a breathable atmosphere of Earth, Earthlike atmosphere, the astronaut is completely reliant on a space suit for environmen ...
s. While near Earth a jet pack has to produce a
g-force The gravitational force equivalent, or, more commonly, g-force, is a measurement of the type of force per unit mass – typically acceleration – that causes a perception of weight, with a g-force of 1 g (not gram in mass measure ...
of at least 1g (a smaller g-force, providing only some deviation from free fall is of little use here), for excursions outside a free falling spaceship, a small g-force providing a small deviation from free fall is quite useful. Hence much less delta-v is consumed per unit time, and not during the whole EVA. With only small amounts of thrust needed, safety and temperature are much more manageable than in the atmosphere in Earth's gravity field. Nevertheless, it is currently worn to be used only in case of emergency: the
Simplified Aid For EVA Rescue Simplified Aid For EVA Rescue (SAFER) is a small, self-contained, propulsive backpack system (jet pack) worn during spacewalks, to be used in case of emergency only. If an untethered astronaut were to lose physical contact with the vessel, it wou ...
(SAFER).


Hydrojet packs

The 21st century has seen a new approach to jet packs where water is used as a high-density propulsion fluid. This requires a very large mass of fluid that makes a self-contained jet pack infeasible. Instead, this approach separates the engine, fuel and fluid supply from the pilot's flying apparatus, using a long flexible hose to feed the water to the jet nozzle pack attached to the pilot's body. These inventions are known as "hydro jet packs", and successful designs have used jetski technology as the powerplant operating in a body of water (an ocean, lake, or pool) to provide the needed propulsion. Several hydro jet pack approaches have been successfully tested and put into production. Flow rate can be controlled by a throttle operator on the jetski, or by the pilot using a remote actuator. Another significant difference with hydro jet packs is that they can be operated below the surface as well as above it. As of 2013, many hydro jet pack rental businesses are operating in various locations around the world.


JetLev

The JetLev was the first hydroflight jet pack on the market, and its makers were awarded the first patents, in 2008, for hydro jet packs. The JetLev has the appearance of a typical jet pack, with two nozzles on a backpack propelling the rider upwards. It just has an umbilicus to the powering jetski that provides the water for the thrust used.


Flyboard

A Flyboard has water jets under each of the pilot's feet. An optional feature is a lower-thrust water jet for each arm for greater control. The powerplant is a regular jetski. Development for this approach was started in the spring of 2011.


Firefighters

Firefighters in some parts of the world use jet packs which help them to fight fires close to the sea or a water body. The jet packs use water and there is no need for a fire truck or water tank.


Home-made versions

Episode 32 of ''
MythBusters ''MythBusters'' is a science entertainment television program, developed by Peter Rees and produced by Australia's Beyond Television Productions. The series premiered on the Discovery Channel on January 23, 2003. It was broadcast internatio ...
'' investigates the urban legend of an affordable jet pack or rocket pack that can be built from plans purchased on the Internet. Extensive modifications were made by the ''MythBusters'' team due to vagueness in the plans and because of the infeasibility of the specified engine mounting system. The jet pack produced by ''MythBusters'' had two ducted fans powered by ultralight-type piston engines. (Fans complained that the use of piston engines destroyed the whole idea of the pack's being truly based on jets, by which, presumably, they meant self-contained gas turbines.) They found it was not powerful enough to lift a person off the ground, and was expensive to build. The plans specified a Rotax 503 ultralight engine, but they intended to use the more powerful and lighter Rotax 583 engine before a similar lighter unnamed engine was substituted.


In fiction

The concept of jet packs appeared in popular culture, particularly science fiction, long before the technology became practical. Perhaps the first appearance was in
pulp magazine Pulp magazines (also referred to as "the pulps") were inexpensive fiction magazines that were published from 1896 to the late 1950s. The term "pulp" derives from the cheap wood pulp paper on which the magazines were printed. In contrast, magazine ...
s. The 1896 novel ''
The Country of the Pointed Firs ''The Country of the Pointed Firs'' is an 1896 book by American writer Sarah Orne Jewett. It is considered by some literary critics to be her finest work. Plot The narrator, a Bostonian, returns after a brief visit a few summers prior, to the ...
'' mentions a "fog-shaped" man hovering low with a "the look of a pack on his back" who "flittered away out o' sight like a leaf the wind takes with it". The 1928 cover of '' Amazing Stories'' featured a man flying with a jet pack. When
Republic Pictures Republic Pictures Corporation (currently held under Melange Pictures, LLC) was an American motion picture production-distribution corporation in operation from 1935 to 1967, that was based in Los Angeles. It had studio facilities in Studio City an ...
planned to produce a
superhero A superhero or superheroine is a stock character that typically possesses ''superpowers'', abilities beyond those of ordinary people, and fits the role of the hero, typically using his or her powers to help the world become a better place, ...
serial using its renowned "flying man" scenes as used in ''
The Adventures of Captain Marvel ''Adventures of Captain Marvel'' is a 1941 American 12-chapter black-and-white movie serial from Republic Pictures, produced by Hiram S. Brown, Jr., directed by John English and William Witney, that stars Tom Tyler in the title role of Captai ...
'', the character of Captain Marvel was tied up in litigation with the owners of the character of
Superman Superman is a superhero who appears in American comic books published by DC Comics. The character was created by writer Jerry Siegel and artist Joe Shuster, and debuted in the comic book ''Action Comics'' #1 (cover-dated June 1938 and publi ...
. For its postwar superhero serial, Republic used a jet pack in '' King of the Rocket Men''. The same stock special effects were used in other serials. While several science fiction novels from the 1950s featured jet packs, it was not until the Bell Rocket Belt in the 1960s that the jet pack caught the imagination of the mainstream. Bell's demonstration flights in the U.S. and other countries created significant public enthusiasm. Jet packs were featured in two episodes ("Turu the Terrible" and "The Invisible Monster"), of the original '' Jonny Quest'' (1964-1965) animated television series, and are seen at the end of the closing credits. In 1965 a Bell Rocket Belt appeared in the James Bond movie '' Thunderball'' when James Bond played by
Sean Connery Sir Sean Connery (born Thomas Connery; 25 August 1930 – 31 October 2020) was a Scottish actor. He was the first actor to portray fictional British secret agent James Bond on film, starring in seven Bond films between 1962 and 1983. Origina ...
used a jet pack in the pre-title sequence to escape the villains and rendezvous with his French contact. The pack was piloted by Gordon Yaeger and Bill Suitor. In the Irwin Allen television series '' Lost in Space'' (1965-1968), a jet pack was used by members of the ''Jupiter 2'' expedition on several occasions. In 1966 the plot of the 21st book in the
Rick Brant Rick Brant is the central character in a series of 24 adventure and mystery novels by John Blaine, a pseudonym for authors Harold L. Goodwin (all titles) and Peter J. Harkins (co-author of the first three). The series was published by Grosset ...
series titled '' Rocket Jumper'' was based on a hydrogen peroxide fueled jet pack. The book included a relatively detailed description of the design including the use of a platinum-metal screen catalyst. The 1976 television series '' Ark II'' featured a jet pack called the Jet Jumper. In the ''
Star Wars ''Star Wars'' is an American epic film, epic space opera multimedia franchise created by George Lucas, which began with the Star Wars (film), eponymous 1977 film and quickly became a worldwide popular culture, pop-culture Cultural impact of S ...
'' original trilogy, the bounty hunter
Boba Fett Boba Fett ( ) is a fictional character in the ''Star Wars'' franchise. First appearing in the ''Star Wars Holiday Special'' (1978), where he was voiced by Don Francks, he is an armored bounty hunter featured in both the original and prequel fi ...
used a jet pack. In the prequel trilogy, Jango Fett also used a jet pack. '' The Mandalorian'' TV series from 2019 has multiple characters using jetpacks, as do various comics, video games, and other television shows in the franchise. In the 1982-1995 comics book series, '' The Rocketeer'', the protagonist, Cliff Secord, acquires a stolen military jet pack and uses it to become the eponymous superhero. It was later adapted into a
motion picture A film also called a movie, motion picture, moving picture, picture, photoplay or (slang) flick is a work of visual art that simulates experiences and otherwise communicates ideas, stories, perceptions, feelings, beauty, or atmosphere ...
in 1991. In 1988 Cinemaware created the Amiga computer game ''
Rocket Ranger ''Rocket Ranger'' is a 1988 action-adventure game developed and published by Cinemaware. The game's setting is based in the World War II era, allowing the player to control a US Army scientist and setting out to stop Nazi Germany from winning the ...
'' which was ported to several other platforms of the era and in 1991 and 1992 Malibu Comics published a ''Rocket Ranger'' comic series closely based on the computer game. The
G.I. Joe ''G.I. Joe'' is an American media franchise and a line of action figures owned and produced by the toy company Hasbro. The initial product offering represented four of the branches of the U.S. armed forces with the Action Soldier ( U.S. Army), Ac ...
action figure launch in 1982 included the JUMP (Jet Mobile Propulsion Unit) jet pack as an accessory. It was also featured prominently in the related ''G.I. Joe'' comic book series and cartoon. Jet packs have been used by the title characters in several episodes of ''
SWAT Kats ''SWAT Kats: The Radical Squadron'' is a 1993–1994 American animated television series created by Christian and Yvon Tremblay and produced by Hanna-Barbera Cartoons. The series takes place in the fictional metropolis of Megakat City, which is p ...
'' cartoon series (1993–1994). In the '' Toy Story'' franchise introduced in 1995, Buzz Lightyear uses a jet pack (which is made of plastic). In the 1997 video game '' Crash Bandicoot 2: Cortex Strikes Back'', the titular character Crash operates a jet pack in two main levels: "Rock It" and "Pack Attack". He also uses the jet pack in the final boss fight against Dr. Neo Cortex. '' Super Mario Sunshine'' for the
Nintendo is a Japanese Multinational corporation, multinational video game company headquartered in Kyoto, Japan. It develops video games and video game consoles. Nintendo was founded in 1889 as by craftsman Fusajiro Yamauchi and originally produce ...
GameCube The is a home video game console developed and released by Nintendo in Japan on September 14, 2001, in North America on November 18, 2001, and in PAL territories in 2002. It is the successor to the Nintendo 64 (1996), and predecessor of the Wii ...
, features Mario with an autonomous, water-powered jet pack named the Flash Liquidizing Ultra Dousing Device (or, F.L.U.D.D.) as a key element of navigation throughout the game; in addition to its default "hover nozzle", which allows the titular character to change trajectory or hover in mid-air, it can be upgraded/customized to allow Mario to make an immediate jump boost (the "rocket nozzle"), or allow Mario to increase his speed exponentially while running or swimming (the "turbo nozzle"). The device has also appeared in various remakes and/or ports of the game, as well as in brief cameos or references in other Nintendo and Mario games. Jet packs appear in the popular video game '' Halo: Reach'' The jet pack also appears in the 2012 video game '' Halo 4'', developed by
343 Industries 343 Industries is an American video game developer located in Redmond, Washington, part of Xbox Game Studios. Headed by Pierre Hintze, the studio is responsible for the ''Halo'' series of military science fiction games, originally created and ...
. Jet packs also appeared in other video games, including '' Duke Nukem 3D'', '' Jetpack Joyride'', '' BloodRayne'' (worn by Nazi troopers), '' Tribes'', '' Giants: Citizen Kabuto'', '' Armed and Dangerous'', and the ''Pilotwings'' series, in which it is referred to as a "Rocket Belt". It is also accessible in the video game '' Grand Theft Auto: San Andreas''. '' Fallout 4'' also has a jet pack power armor feature. '' Grand Theft Auto Online'' added a jet pack called "Thruster" as a usable vehicle in a content update on December 12, 2017. Rocketeer is an Allied flying infantry unit in '' Red Alert 2''. Many science fiction movies have included jet packs, most notably, ''The Rocketeer'', ''
Minority Report Minority Report may refer to: * Minority report (Poor Law), published by the UK Royal Commission on the Poor Laws and Relief of Distress 1905–09 * "Minority Report", a 1949 science fiction short story by Theodore Sturgeon * "The Minority Report ...
'', ''
Sky Captain and the World of Tomorrow ''Sky Captain and the World of Tomorrow'', often shortened to ''Sky Captain'', is a 2004 science fiction action- adventure film written and directed by Kerry Conran in his directorial debut, and produced by Jon Avnet, Sadie Frost, Jude Law an ...
'', and '' Tomorrowland''. Running since 2013, ''Adventures in Jetpacks'' is a semi-regularly updated webcomic in which the cast of characters make regular use of jet packs.


See also

*
Backpack helicopter A backpack helicopter is a helicopter motor and rotor and controls assembly that can be strapped to a person's back, so they can walk about on the ground wearing it, and can use it to fly. It uses a harness like a parachute harness and should hav ...
* History of the jet engine * Martin Jetpack, despite its name, was a backpack helicopter * Space Ranger (device) advertised in ''Popular Science'' 1970s * Wingsuit flying *
Jetpack man Jetpack man or guy in a jetpack or Iron Man is an unknown person or object that has been observed flying what appears to be an unauthorized jetpack around the Los Angeles California area at least five times in 2020–21. Multiple airplane pilots h ...


References


External links


''Popular Mechanics'' comparison of the TAM Rocket Belt and Jetpack International's Jetpack Aviation (JB-9 jetpack)YouTube video
{{DEFAULTSORT:Jet Pack Russian inventions Science fiction themes Aircraft configurations Ultralight aircraft Emerging technologies