Ground Resonance and Langing Gear
Ground Resonance and Langing Gear
(OP)
I've read and heard a lot about how Ground Resonance sets up and can quickly progress into an oscillation that upsets a helicopter. I've got references from Ray Prouty that lead me to believe that all helicopters, regardless of the configuration, are vulnerable to this.
A co-worker says that he's been to a conference where an expert stated that 2-bladed helicopters aren't susceptible to ground resonance.
Who's right?
In this vein, why did Bell change the landing gear configuration between the 206L and the 206L-4?
A co-worker says that he's been to a conference where an expert stated that 2-bladed helicopters aren't susceptible to ground resonance.
Who's right?
In this vein, why did Bell change the landing gear configuration between the 206L and the 206L-4?
Steven Fahey, CET
"Simplicate, and add more lightness" - Bill Stout
Talk To Other Members
RE: Ground Resonance and Langing Gear
To my limited knowledge, all teetering rotors are without lead-lag hinges, with the exception of the Kaman intermeshing helicopter. The Kaman heads appears to provide for lead-lag between the two rotors and, ALSO, between the two blades on the same rotor.
Dave J
RE: Ground Resonance and Langing Gear
Heidi M.