DiscussWorldIssues - Socio-Economic Religion and Political Uncensored Debate - View Single Post - Hovered my helicopter upside down. Video.

**gariharrr** · 04-26-2007, 02:50 AM

I'm amazed that people actually believe the rotor spins the other way round to fly inverted. [thumbup]

The RPM is constant. The blade pitch is variable. I have ~12° positive and negative collective pitch on my heli the way it's set up now and the blade profile is symmetrical. Flying inverted isn't much different form flying upright. The rotor disc is an incredibly stable gyro.

Full size helicopters can't fly inverted because they don't have the negative pitch range, the rotor system wasn't made for strong negative loads, the engines and other systems usually can't handle prolonged negative G, and the blades aren't symmetrical. full size helicopters are utility aircraft, not thoroughbred aerobatic machines like RC helicopters are.

04-26-2007, 02:50 AM	#15
gariharrr Join Date Oct 2005 Posts 775 Senior Member	I'm amazed that people actually believe the rotor spins the other way round to fly inverted. [thumbup] The RPM is constant. The blade pitch is variable. I have ~12° positive and negative collective pitch on my heli the way it's set up now and the blade profile is symmetrical. Flying inverted isn't much different form flying upright. The rotor disc is an incredibly stable gyro. Full size helicopters can't fly inverted because they don't have the negative pitch range, the rotor system wasn't made for strong negative loads, the engines and other systems usually can't handle prolonged negative G, and the blades aren't symmetrical. full size helicopters are utility aircraft, not thoroughbred aerobatic machines like RC helicopters are.
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