4 Stroke for Raptor .50

[TALONLM]

Hello all,

Noob here and was wondering if anyone knows whether the OS FS-52H Surpass will work in a Raptor .50?

http://www.osengines.com/engines/osmg1952.html
Heres the link to OS.

[Danal Estes]

You'll be disappointed. 4-stroke engines have very different torque curves from 2-stroke. You could probably find a 4-stroke that would fly a heli, including that one,(it's been done), but it will suck.

That specific engine is not likely powerful enough for that heli, based on the "rule of thumb" for airplanes that a 4-stroke needs to be about 1.5 times the displacement of a 2-stroke.

[TALONLM]

Thanks for the info. I've been flying the 4 stroke that comes with the Real Flight G3.5 sim and I like the way it handles. It appears to be very smooth with plenty of power, but it is a sim. Thanks for the info. I'll ask around at my LHS and see if any one has any experience there. I'll probably end up just sticking with the Two stroke though.

[BarracudaHockey]

Its a neat experement if your into serious tinkering but if you just want to fly get a 50sxh hyper and be done with it. And I doubt that engine would get a Raptor off the ground w/o over heating.