The UFM Easy Riser is an American swept wing

biplane A biplane is a fixed-wing aircraft with two main wings stacked one above the other. The first powered, controlled aeroplane to fly, the Wright Flyer, used a biplane wing arrangement, as did many aircraft in the early years of aviation. While ...

hang glider Hang gliding is an air sport or recreational activity in which a pilot flies a light, non-motorised foot-launched heavier-than-air aircraft called a hang glider. Most modern hang gliders are made of an aluminium alloy or composite frame covered ...

that was first powered in 1975, becoming the first modern

ultralight aircraft Ultralight aviation (called microlight aviation in some countries) is the flying of lightweight, 1- or 2-seat fixed-wing aircraft. Some countries differentiate between weight-shift control and conventional three-axis control aircraft with ailer ...

. The Easy Riser was still in production as an unpowered glider in 2002 by Ultralight Flying Machines.Cliche, Andre: ''Ultralight Aircraft Shopper's Guide'' 8th Edition, page E-14. Cybair Limited Publishing, 2001.

Design and development

The Easy Riser was developed by Larry Mauro from the earlier Kiceniuk Icarus II biplane hang glider. An engine was installed by John Moody in 1975 so the glider could be launched from flat terrain.Rogers, Bennett: ''1974 Sailplane Directory, Soaring Magazine'', page 99. Soaring Society of America, August 1974. USPS 499-920 Early powered versions consisted simply of a motor added to the foot-launched hang glider version with control by a combination of weight shift for pitch and tip rudders for roll and yaw, with the tip rudders used together as air brakes. Because many pilots could not run fast enough to achieve take-off, wheeled

tricycle gear Tricycle gear is a type of aircraft undercarriage, or ''landing gear'', arranged in a tricycle fashion. The tricycle arrangement has a single nose wheel in the front, and two or more main wheels slightly aft of the center of gravity. Tricycle g ...

was added. The aircraft exhibited poor pitch stability, so a

horizontal stabilizer A tailplane, also known as a horizontal stabiliser, is a small lifting surface located on the tail (empennage) behind the main lifting surfaces of a fixed-wing aircraft as well as other non-fixed-wing aircraft such as helicopters and gyroplan ...

and

elevator An elevator or lift is a wire rope, cable-assisted, hydraulic cylinder-assisted, or roller-track assisted machine that vertically transports people or freight between floors, levels, or deck (building), decks of a building, watercraft, ...

were added. Finally, on later versions, the tip rudders were replaced with a tail-mounted rudder. The Easy Riser is constructed with an

aluminium Aluminium (aluminum in American and Canadian English) is a chemical element with the symbol Al and atomic number 13. Aluminium has a density lower than those of other common metals, at approximately one third that of steel. I ...

structure and stamped ribs, covered in doped

aircraft fabric covering Aircraft fabric covering is a term used for both the material used and the process of covering aircraft open structures. It is also used for reinforcing closed plywood structures. The de Havilland Mosquito is an example of this technique, as ar ...

Mylar BoPET (biaxially-oriented polyethylene terephthalate) is a polyester film made from stretched polyethylene terephthalate (PET) and is used for its high tensile strength, chemical and dimensional stability, transparency, reflectivity, gas and aro ...

or other coverings. The pilot sits on a fabric sling seat. Engines used include the

McCulloch MAC-101 The McCulloch MAC-101, also called the MC-101 and MC101, is a two-stroke, single cylinder engine that was designed and produced by McCulloch Motors Corporation for kart racing Kart racing or karting is a road racing variant of motorsport with ...

Hirth F-36 The Hirth F-36 is a single-cylinder, two-stroke, carburetted aircraft engine designed for use on ultralight aircraft, especially powered paragliders and ultralight trikes. It is noted for its extremely small equipped weight of including exh ...

and

Solo 210 The Hirth F-36 is a single-cylinder, two-stroke, carburetted aircraft engine designed for use on ultralight aircraft, especially powered paragliders and ultralight trikes. It is noted for its extremely small equipped weight of including exh ...

. Easy Risers were produced in large numbers until the ultralight market downturn of the early 1980s when the type was taken out of production. Later, the unpowered glider version was put back into limited production. In 1979, Larry Mauro installed

solar cells A solar cell, or photovoltaic cell, is an electronic device that converts the energy of light directly into electricity by the photovoltaic effect, which is a physics, physical and Chemical substance, chemical phenomenon.Mauro Solar Riser The Mauro Solar Riser is an American biplane ultralight electric aircraft that was the first crewed aircraft to fly on solar power. It was also only the second solar-powered aircraft to fly, after the uncrewed AstroFlight Sunrise, which had ...

become the first solar powered aircraft to carry a person aloft.

Aircraft on Display

Canadian Air & Space Museum The Canadian Air and Space Conservancy (formerly the Toronto Aerospace Museum and the Canadian Air and Space Museum) was an aviation museum that was located in Toronto, Ontario, featuring artifacts, exhibits and stories illustrating a century of ...

- Easy Riser used by

Bill Lishman William Lishman (February 12, 1939 – December 30, 2017) was a Canadian sculptor, filmmaker, inventor, naturalist and public speaker, president of William Lishman & Associates Limited, Vice President of Paula Lishman Limited and Chair Emeritu ...

in projects to teach birds to migrate *

EAA AirVenture Museum The EAA Aviation Museum, formerly the EAA AirVenture Museum (or Air Adventure Museum), is a museum dedicated to the preservation and display of historic and experimental aircraft as well as antiques, classics, and warbirds. The museum is lo ...

- two Easy Risers and the Solar Riser. *

US Southwest Soaring Museum The US Southwest Soaring Museum is an aviation museum, located at 918 E US Route 66, in Moriarty, New Mexico, United States that focuses on the history of gliding in the western United States. The museum is an affiliate member of the Soaring Socie ...

- Easy Riser

Specifications (Easy Riser ultralight)

Notable appearances in media

References

External links