Not sure as I no longer have any TT engines, but this is most likely just a
2mm slotted head screw. Check one to see if it fits, and if it does I'd
recommend you use a hex head 2MM screw dremeled to the length you need. A
small spring from a Bic lighter or whatever should take care of the tension
dept. If it's the same size as the one in a OS .40FP, I'm sure I have a few
in my stash...
Thunder Tiger parts are available from a number of online resellers:
I've done business with all of the above Thunder Tiger resellers. At this
moment, I'm expecting a cylinder head for my TT F-91s from Paul's Model
Supply. He services and sells parts for a wide variety of glow engines.
Paul stocks Webra engines and parts as well as doing a good deal of business
with Thunder Tiger engines.
If you can't find the Ace Hobby part number for an air bleed screw for a
GP-61 engine, I'd recommend that you start with Paul's Model Supply. If you
know the part number, it should be available at any of the above sites.
Good luck and good shopping!
Thanks for al the great responses. I called many places and struck
out. I then did the obvious. I found a similar but not perfect screw
(2.5 mm), cut a piece off the spring and threaded it into the screw
hole. Will fly it tomorrow. Thanks again.
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