AR-1 gyro manufacturer
- Oct 31, 2011
- Tampa, FL
- Total Flight Time
- 4000+ 560 gyroplanes. Sport CFI Gyro and Trikes. Pilot Airplane
Hi Anthony and Fara,
Many thanks for the responses. Adjusted the tightness of the roll and pitch bolts yesterday to get a nice stiffness without excessive force when using the stick. Adjusted the tracking using plastic shims. Did test flights. Previously I could fly up to 115 mph without any vibrations or shudders. The VNE in my machine is 100 mph so the 115 mph was a rare accidental occurrence. Yesterday when I reached 90+mph straight and level, the whole machine shook violently. I immediately closed the throttle, centered the stick and the shaking subsided. I removed any shims added but the shaking returned at above 90 mph. Anybody experienced such violent shaking of the whole gyro at higher speeds and what did you do to fix it?
Many thanks for any suggestions and advice. John H.
Try loosening the roll and pitch block friction slightly and re-doing this test. If your gyro hops (meaning the body shakes but not the stick) you likely have a tracking issue. This requires changing the pitch of one of the blades by either using shims or if you have an old Magni rotorhead without new eccentric bushing, no adjustment is possible. Its their design. I would advise then bringing it up to the manufacturer. Shim material is placed between the hub bar and the teeter block. Cut a strip of say 2 thou and place it on one side and try flying. If that doesn't work you placed it on the wrong side so change and try. It will be trial and error because you don't have a dynamic balancer