Cyclogyro

exhibition The cyclogyro (cyclocopter) is an aircraft configuration that uses a horizontal-axis cyclorotor as a rotor wing to provide lift and, sometimes, also propulsion and control. In principle, the cyclogyro is capable of vertical take off and landing and hovering performance, like a helicopter, while potentially benefiting from some of the advantages of a fixed-wing aircraft. The first untethered model cyclogyro flight came in 2011 at China's Northwestern Polytechnic Institute. The performance of traditional rotors deteriorates at low Reynolds Numbers by low angle-of-attack blade stall. Current hover-capable MAVs can stay aloft for minutes. Cyclorotor MAVs (very small scale cyclogyros) could utilize unsteady lift to extend endurance. The smallest cyclogyro flown to date weighs 29 grams and was developed by the vertical flight laboratory at Texas A&M University. Commercial cyclogyro UAVs are under development by D-Daelus, Pitch Aeronautics, and CycloTech.

exhibition]] The cyclogyro (cyclocopter) is an aircraft configuration that uses a horizontal-axis cyclorotor as a rotor wing to provide lift and, sometimes, also propulsion and control. In principle, the cyclogyro is capable of vertical take off and landing and hovering performance, like a helicopter, while potentially benefiting from some of the advantages of a fixed-wing aircraft. The first untethered model cyclogyro flight came in 2011 at China's Northwestern Polytechnic Institute. The performance of traditional rotors deteriorates at low Reynolds Numbers by low angle-of-attack blade stall. Current hover-capable MAVs can stay aloft for minutes. Cyclorotor MAVs (very small scale cyclogyros) could utilize unsteady lift to extend endurance. The smallest cyclogyro flown to date weighs 29 grams and was developed by the vertical flight laboratory at Texas A&M University. Commercial cyclogyro UAVs are under development by D-Daelus, Pitch Aeronautics, and CycloTech.

History

Jonathan Edward Caldwell, a pioneer of an American version of a Cyclogyro aircraft propulsion, took out patent number 1,640,645. It was granted on August 30th, 1927. The Schroeder S1 of 1930 was a full-size prototype which used the cyclogyro for forward thrust only. Adolf Rohrbach of Germany designed a full VTOL version in 1933, which was later developed in the US and featured a tall streamlined fuselage to keep the wings clear of the ground. Another example was built by Rahn Aircraft in 1935, which used two large-chord rotary wings instead of a multi-blade wheel driven by a 240 hp supercharged Wright Whirlwind The cyclogyro has been revisited in the twenty-first century, as a possible configuration for unmanned aerial vehicles.

See also

FanWing Rotary-wing aircraft VTOL/STOL/VSTOL/STOVL Voith Schneider Propeller

References

Further reading

"The Cyclogyro", Vertiflight, The American Helicopter Society, 2005, Vol. 51; No. 2, pages 16–19

External links

Text derived from https://en.wikipedia.org/w/index.php?oldid=1374019280 under CC BY-SA 4.0; modifications have been made.