Rodney, i was there for the last flight of Wojtek's kingcat and the last failure of his 400. it in fact did have a foreign sound coming from the engine. the engine shut down from low rpm's as indicated by the GSU and the sound was noticeable from a distance. it was a clanking sound.
Are you sure that you inspected wojtek's engine?
ORIGINAL: AMTdude
Wojtek's 400 was test run 4-5 times today with no problems. I would like to know more of what happened on the last flight. You could PM me or post it. Intial inspection was that the rotating assembly was spinning properly with no noise other than normal. I had Derrik take off the outer housing and do a visual inspection of the turbine wheel/stator wall and look for areas where the wheel would have made contact. The motor was reassembled and ran flawlessly. I do not have a test plane for engines but am interested in a new Boomerang ARF, has anyone seen the price for one?
Rodney Evans~Technicial Specialist AMT-USA