Will be watching for the teardown results David. The shear pin on the sun gear is the most likely candidate since it was sized for a normally aspirated 13B. After the failure on Marks 20B, I have changed the pin diameter and if there has not been any damage due to the shaft spinning in the sun gear, it can be retrofitted with the larger pin size.
Tracy
Sent from my iPad Today had a failure of my RD-1B gear drive. It couldn't have happened at a better time, I was just taxiing off the runway at my home airport. I just finished flying 200 mi. to Santa Paula to help Paul with the getting of Mike Wills airplane back into the air. Flight home was otherwise unevenful and beautiful. I didn't bother taking it apart, but will do so tomorrow. Feels like I may have broken the sun gear pin again but will have to wait until tomorrow to be sure. The strange thing is that nothing particularly stressed it.
Sorry there is not cause I can report... a little suspense until tomorrow. -- David Leonard Turbo Rotary RV-6 N4VY http://N4VY.RotaryRoster.net
http://RotaryRoster.net
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