There is a lot on other threads about the set-up of 140 and 160 O.S. I have both, and the 140RX is VERY reliable and makes reasonable power. It is also probably one of the simplest motors I have run . . bolt it in, hook the fuel lines, and run it . . no need to touch the pump ever.

The 160FX makes more power and torque (from my back to back tests) and is also very reliable once set-up. Plug it all together and run it . . once tuned, this thing hardly needs the needle touched, and can fly TWO P09 schedules on a 20oz tank. Make sure you take the main needle OFF the engine and mount it on the firewall. The vibration from the engine seems to create bubbles in the fuel line. Not desirable. I also ended up adjusting the pump about 1/2 turn . . can't remember which way . .

I have set a throttle curve on both motors in an effort to get a more linear feel, and the 160FX produced the best result of the two. The power curve is more linear than the 140RX . . but still NOT what a YS would be.

Both these motors start easily. The 160FX needs the starter first flight of the day (and man, it's hard to crank over too . . need a good starter for this one). After that . . it usually starts on one back-flip (put the starter away ).

There's great set-up information for the 160FX on Bob Pastorello's site . . http://www.rcaerobats.net/OS160_Setup.htm I followed this set-up, including the Aeroslave Pipe, and it's faultless.

I use this set-up in a Composite ARF Integral, and there is no way I use full throttle on up-lines except for perhaps the windiest days . . it visably accelerates if I do

Cheers, JB