Editing Contra-rotating propellers (section)

===Ultralight applications===
An Austrian company, [[Sun Flightcraft]], distributes a contra-rotating gearbox for use on [[Rotax 503]] and [[Rotax 582|582]] engines on ultralight and microlight aircraft. The [[Coax-P]] was developed by Hans Neudorfer of [[NeuraJet]] and allows powered hang-gliders and parachutes to develop 15 to 20 percent more power while reducing torque moments. The manufacturer also reports reduced noise levels from dual contra-rotating props using the Coax-P gearbox.<ref>{{cite web |url=http://sunflightcraft.com/en/coaxp.php |title=COAX-P: Counter rotating propeller gearbox |website=Sun Flightcraft |access-date=July 18, 2019}}</ref><ref name="WDLA04">{{cite journal |surname1=Bertrand |given1=Noel |given2=Rene |surname2=Coulon |title=World Directory of Leisure Aviation 2003-04 |journal=World Directory of Light Aviation |pages=70, 87 |publisher=Pagefast Ltd |location=Lancaster, United Kingdom |year=2003 |issn=1368-485X}}</ref><ref>{{cite web|url=http://www.neurajet.at/englisch/home.html|archive-url=https://web.archive.org/web/20051222043916/http://www.neurajet.at/englisch/home.html|title=Willkommen bei Neura Jet|archive-date=22 December 2005|work=neurajet.at|access-date=3 November 2015}}</ref>