ORIGINAL: modegrande
I was wondering if it's possible to convert an OS 40 fp rc engine to control line by removing the existing carb and replacing it with a venturi and needle valve assembly. The engine is new in the box, and I was hoping it could be done without altering it in any way just in case I wanted to use it for rc again.
Thanks for any input,
Maurice
The FP-40, unlike the LA .40 has a boost port. Blocking the boost port will help the engine run better with large props in the RPM range that CL stunt uses. If you intend to fly CL stunt, contact Leonard Neumann on Stuka Stunt Works. He has prepared many, many FP .40's and is always willing to share the information he has gained. He can also recommend the best venturi size and needle assembly to use. He will even sell them to you if you decide to remove the carb.
Here is a link that explains how they rework the FP .40:
http://www.clstunt.com/engines.htm
George