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A rockoon (from ''
rocket A rocket (from it, rocchetto, , bobbin/spool) is a vehicle that uses jet propulsion to accelerate without using the surrounding air. A rocket engine produces thrust by reaction to exhaust expelled at high speed. Rocket engines work entire ...
'' and ''
balloon A balloon is a flexible bag that can be inflated with a gas, such as helium, hydrogen, nitrous oxide, oxygen, and air. For special tasks, balloons can be filled with smoke, liquid water, granular media (e.g. sand, flour or rice), or li ...
'') is a solid fuel sounding rocket that, rather than being immediately lit while on the ground, is first carried into the upper atmosphere by a gas-filled balloon, then separated from the balloon and ignited. This allows the rocket to achieve a higher altitude, as the rocket does not have to move under power through the lower and thicker layers of the atmosphere. The original concept was developed by Cmdr. Lee Lewis, Cmdr. G. Halvorson, S. F. Singer, and
James A. Van Allen James Alfred Van Allen (September 7, 1914August 9, 2006) was an American space scientist at the University of Iowa. He was instrumental in establishing the field of magnetospheric research in space. The Van Allen radiation belts were named afte ...
during the Aerobee rocket firing cruise of the U.S.S. ''Norton Sound'' on March 1, 1949. A serious disadvantage is that unpiloted balloons cannot be steered, and consequently the location from which the rocket is launched can be uncertain. Therefore, a large area for the fall of the rocket is required for safety reasons.


Early atmospheric research

''Time'' magazine reported in 1959: "Van Allen's 'Rockoons' could not be fired in Iowa for fear that the spent rockets would strike an Iowan or his house." Van Allen convinced the U.S. Coast Guard to let him fire his rockoons from the icebreaker ''Eastwind'' that was bound for
Greenland Greenland ( kl, Kalaallit Nunaat, ; da, Grønland, ) is an island country in North America that is part of the Kingdom of Denmark. It is located between the Arctic and Atlantic oceans, east of the Canadian Arctic Archipelago. Greenland is ...
. "The first balloon rose properly to 70,000 ft., but the rocket hanging under it did not fire. The second Rockoon behaved in the same maddening way. On the theory that extreme cold at high altitude might have stopped the clockwork supposed to ignite the rockets, Van Allen heated cans of orange juice snuggled them into the third Rockoon's gondola and wrapped the whole business in insulation. The rocket fired." The Office of Naval Research (USA ONR) used the Loki in some of its Rockoon launches, lofting the Loki to high altitudes on a helium balloon before firing, for upper atmosphere research. The first Rockoon launch of the Loki I occurred on Jul 1 1955 from shipboard off the coast of Greenland. During July–October 1955 instrumented Loki I and
Deacon A deacon is a member of the diaconate, an office in Christian churches that is generally associated with service of some kind, but which varies among theological and denominational traditions. Major Christian churches, such as the Catholic Chur ...
rockets were successfully balloon launched (Rockoons) from shipboard off the coast of
Greenland Greenland ( kl, Kalaallit Nunaat, ; da, Grønland, ) is an island country in North America that is part of the Kingdom of Denmark. It is located between the Arctic and Atlantic oceans, east of the Canadian Arctic Archipelago. Greenland is ...
in cosmic-ray studies by The University of Iowa research group. Army Ordnance supplied JPL-developed Loki rockets and ONR sponsored the project. The first attempt of the Deacon Rockoon on Aug 21 1952 06:25 GMT from the
Arctic Ocean The Arctic Ocean is the smallest and shallowest of the world's five major oceans. It spans an area of approximately and is known as the coldest of all the oceans. The International Hydrographic Organization (IHO) recognizes it as an ocean, ...
80.1 N x 68.5 W was a failure. However, success came on Aug 9 1953 in the
Atlantic Ocean The Atlantic Ocean is the second-largest of the world's five oceans, with an area of about . It covers approximately 20% of Earth#Surface, Earth's surface and about 29% of its water surface area. It is known to separate the "Old World" of Afr ...
, Launch Site 11 Launch Point 10 74.38 N x 71.93 W, at 05:54 GMT. This was quickly followed by another success on Aug 30 1953 20:46 GMT, at Atlantic Ocean Launch Site 11 Launch Point 13 53.13 N, 54.75 W. In September 1957, as part of the U.S. contributions for the
International Geophysical Year The International Geophysical Year (IGY; french: Année géophysique internationale) was an international scientific project that lasted from 1 July 1957 to 31 December 1958. It marked the end of a long period during the Cold War when scientific i ...
, thirty-six Rockoons (balloon-launched rockets) were launched from Navy icebreaker U.S.S. Glacier in Atlantic, Pacific, and Antarctic areas ranging from 75° N. to 72° S. latitude, as part of the scientific program headed by James A. Van Allen and Lawrence J. Cahill of The University of Iowa. These were the first known upper atmosphere rocket soundings in the Antarctic area. Launched from IGY Rockoon Launch Site 2, Atlantic Ocean; Latitude: 0.83° N, Longitude: 0.99° W.


Recent usage

More recently, the JP Aerospace company has developed and used rockoons as part of its space access plans. Additionally,
Iowa State University Iowa State University of Science and Technology (Iowa State University, Iowa State, or ISU) is a public land-grant research university in Ames, Iowa. Founded in 1858 as the Iowa Agricultural College and Model Farm, Iowa State became one of the ...
, the University of Alabama in Huntsville, and
Purdue University Purdue University is a public land-grant research university in West Lafayette, Indiana, and the flagship campus of the Purdue University system. The university was founded in 1869 after Lafayette businessman John Purdue donated land and ...
(Purdue Orbital) have started programs to develop rockoons and significant work has been recently done by Leo Aerospace based in Los Angeles and a Romanian space company,
ARCASPACE Romanian Cosmonautics and Aeronautics Association ( ro, Asociația Română pentru Cosmonautică și Aeronautică), also known as ARCAspace, is an aerospace company based in Râmnicu Vâlcea, Romania. It builds rockets, high-altitude balloons, a ...
. The Spanish company
Zero2infinity Zero 2 Infinity (0II∞, sometimes rendered as Zero2Infinity) is a private Spanish company developing high-altitude balloons intended to provide access to near space and low Earth orbit using a balloon-borne pod and a balloon-borne launcher. ...
plans to launch a toroid shaped rocket from a balloon called Bloostar in 2018 to carry micro satellites to low Earth orbit. UK base company, B2Space is developing the concept to launch small satellites into low Earth orbit. The American company
Deimos-One Deimos-One is an American spaceflight technology development company working on an AI powered, autonomous UAV rocket system to move payloads to space. As of January 2021, the company has completed a successful prototype test flight, reaching ...
is developing an AI assisted concept to launch rockets and carry satellites to low Earth orbit.


See also

* Air launch to orbit * CU Spaceflight * Da Vinci Project * JP Aerospace * Non-rocket spacelaunch *
Zero2infinity Zero 2 Infinity (0II∞, sometimes rendered as Zero2Infinity) is a private Spanish company developing high-altitude balloons intended to provide access to near space and low Earth orbit using a balloon-borne pod and a balloon-borne launcher. ...
's Bloostar * Deimos-One's Vulcan * The Space Perspective


References


Sources

* *


External links

{{wiktionary, rockoon
Details of Rockoon launches made in 1956 from the USS COLONIAL in the Pacific Ocean
Stratocat website

Stratocat website * ttp://www.harcspace.com/ High Altitude Research Corporation 1953 in spaceflight Rocket propulsion Spaceflight