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General control line discussion => Open Forum => Topic started by: bob whitney on May 23, 2015, 02:55:56 PM

Title: FP OS 40
Post by: bob whitney on May 23, 2015, 02:55:56 PM

  i have a chance to pick up a NJB FP 40 wih U/C venturi  will it make a good stunt engine??

Title: Re: FP OS 40
Post by: peabody on May 23, 2015, 04:13:33 PM

Hi Bob
You'll get lots of answers ....
Randy used to make a BC sleeve set up that yields a terrific stunt run.
Stock, you have to run the fast and not overload ......a "magic" prop is an APC 10 1/2 X 4 1/2
Have fun

Title: Re: FP OS 40
Post by: RknRusty on May 23, 2015, 05:36:34 PM

I use the magic APC prop Peabody mentions with an Eric Rule tongue muffler tapped for pressure and Enya #3 plug. Contrary to what I've read, it will run a very timely 2-4 break. I believe my venturi is .257". Mine is one of the later production ABN engines and I fly it in my 45 ounce Oriental. I like it a lot. BTW, my prop/muffler/plug setup was recommended to me by the Philly Fliers. I always pay attention when they offer advice.
Rusty