Hi:

    I have been watching several friends of mine run their O.S LA and FP engines as stunt engines.  They adjust these engines to run in a very rich 4 cycle and use large props.

    It is my understanding that these engines are best run in a "wet" 2 cycle with low pitched props due to their P&C materials.

   These engines appear to be very good engines for use as they start easily, easy to adjust and hold setting very well.

     Any suggestions or comments?

                                                                                                                              Tia.

                                                                                                                              Frank


   

There's a lot more to it than just prop and fuel and NV setting. Muffler restriction is a major deal, along with venturi size and tank, muffler pressure or not, glowplug, etc. "The Setup" (i.e., the one that works) includes everything related to the power system. IMO, you need to investigate your friends "setup" in much more detail, and take notes.  I have noticed that folks will take the notes on a complete, known to be good setup and not get all the details right, and wonder why it doesn't work at all.  Details count! Steve

Which is why you should go through that WHOLE THREAD!

And if it doesn't work at first (mine didn't), keep going over the thread and trying things until you find a combination that works.

http://stunthanger.com/smf/index.php?topic=21156.0

Like which prop,, what fuel,, and of course,, use a tach,,