Stuart & Kathryn Fields wrote:

Rick: You are right. There is no collective control available to the
blades. This means autorotation is not feasible. Yaw control of the
coaxial ships is usually accomplished by differential torque on the blade
sets, which is normally accomplished by differentially changing the pitch on
one set vs the other. While I have flown several different experimental
homebuilt helicopters, I wouldn't want to be close to this thing with the
engine running and it tied down. I think that we have here another
potential Darwin Award candidate.


Ask yawn, I bet he will tell us zoom has already flight tested it.

Dan, U.S. Air Force, retired