Helibilly Posted October 25 Share Posted October 25 Having put together many Raptors, 30’s and 50’s over the years, I have been stumped by my latest one. It is a Raptor 50 fitted with a TT 50 PRO Motor and TT mount. As with all used heli’s I buy, it has been stripped down and had all the bearings changed, had a good deep clean and rebuilt. My problem is that after the rebuild the clutch is locked up, indicating something is mis-aligned. I have loosened of the mounting to frame bolts and by moving the engine about, can get the clutch to operate as it should. As all the engine, mount and clutch fixing holes are pre drilled, they can’t be altered. The clutch bearings have been checked and are all OK. I even went to the lengths of changing the frame to a new one, with the same result. In all my many year building Raptors, this has never happened. As a last resort I am getting a new engine mount and will try a spare OS 32 motor and see how it pans out. Has Anyone had similar problems? I will report back on any findings when I have swapped out the parts mentioned. Thanks Bill W Quote Link to comment Share on other sites More sharing options...
Paul De Tourtoulon Posted October 25 Share Posted October 25 Have you tried to put the clutch into the housing out of the helicopter, and see if the clutch isn't binding ? Quote Link to comment Share on other sites More sharing options...
Helibilly Posted October 25 Author Share Posted October 25 There is no binding at all with the clutch and bell along with the starter shaft out of the heli. It seems like an alignment problem. I have tried the clutch and engine in 2 V2 frames with the same result. I have even taken the shim out from under the clutch shoe. I suspect either mounting is bent/twisted or motor holes are drilled wrong? I have no past history on this motor. Ordered new motor mount. Bill W. Quote Link to comment Share on other sites More sharing options...
Paul De Tourtoulon Posted October 26 Share Posted October 26 Funny, I have sold a few in my time and repaired customers ones, and I have never had that problem. Quote Link to comment Share on other sites More sharing options...
Engine Doctor Posted October 26 Share Posted October 26 (edited) Are the mountings on the frame bent/out of alignment due to a bang at some time . I don't do helicopters but basic engineering principles apply . Parts locking up when all the screws etc are tightened to their working spec suggest a damaged or bent item somewhere along the line . Try tightening one part at a time to see when it starts to bind . Good luck and hope you find the fault. Edited October 26 by Engine Doctor Quote Link to comment Share on other sites More sharing options...
Helibilly Posted October 26 Author Share Posted October 26 Just awaiting delivery of new mount as a 32OS MOTOR with a different mount fits ok. Existing mount doesn’t line up, hence suspect old mount. I will let you know. Bill W. Quote Link to comment Share on other sites More sharing options...
Paul De Tourtoulon Posted October 26 Share Posted October 26 I can't see anything bent, the way that all the pieces of plastic and aluminum are all molded. Quote Link to comment Share on other sites More sharing options...
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