ORIGINAL: gcb
ORIGINAL: dennis
...As has been said many times the OS40FP, the Thunder Tigre 40GP and the Tower 40 were all completely interchangable in parts. I have seen motors with parts from all 3 of the motors combined...
Not sure about the .40 but the TT .10, .15, and .25 all have sprinkler venturies with the needle valve to the rear instead of centered.
Here is a TT .10 venturi:
George
The sprinkler system is not a major component part. Thunder Tigre engines for the most part have interchangeable parts. I believe that the 15 heads are different in the amount os screw holes in them but cranks,p/L and wrist pins, gaskets etc and crank cases can be used. The venturi that came on the Thunder Tigre engines was usually too big a bore and needed to be reduced for c/L stunt.
Dennis