WaspAir
Supreme Allied Gyro CFI
- Joined
- Oct 21, 2006
- Messages
- 5,424
- Location
- Colorado front range
- Aircraft
- Bell 47G-3B-1 / A&S 18A / Phoebus C, etc.
- Total Flight Time
- stopped caring at 1000
Coning is a slightly misleading term. It suggests a straight sided cone (from revolving a straight line) as if all bending happens at the root. A bowl-like shape is more likely, especially given the distribution of lift along the span and the flexibility of the blade.
Whether fully articulated with a flapping hinge, teetering and equipped with a Robinson coning hinge, or teetering while fixed to a hub bar, the blade will take on a new shape under load, just as the tips will droop when everything is stopped. The difference is only where the bending starts along the span.
Whether fully articulated with a flapping hinge, teetering and equipped with a Robinson coning hinge, or teetering while fixed to a hub bar, the blade will take on a new shape under load, just as the tips will droop when everything is stopped. The difference is only where the bending starts along the span.