WHAT ENGINE TO USE
04-15-2010, 04:17 PM
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WHAT ENGINE TO USE
Hi Guys, I have been away from the R/C aircraft sport for sometime and I am not familiar with today's engine technology. I am currently building an old (circa 1975) Sterling Fokker D-7 war bird and I am wondering what OS Engines has that will both fit and power this bird adequately. Any suggestions would be greatly appreciated. Thanks
04-15-2010, 06:51 PM
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RE: WHAT ENGINE TO USE
What's the size and estimated weight of the airplane? To me, that D-7 wouldn't be right unless it had a 4-stroke in it. I think it would just sound more appropriate.
04-15-2010, 06:52 PM
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RE: WHAT ENGINE TO USE
ORIGINAL: aerowoof
fs 91 0r 75ax
fs 91 0r 75ax
IMHO the four strike is more appropriate not that there is anything wrong with the 75AX but four strokes have that sound
. Cheers,
Colin
04-16-2010, 06:05 AM
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RE: WHAT ENGINE TO USE
Thanks for the input guys! My bad, I forgot to include that a 45 to 65 engine is Sterlings suggested engine size and that the weight should come in at 8 to 10 lbs. BTW the engine size is two cycle as there weren't many 4 strokes back in 1975 when I purchased this kit. Yes, I've been carrying it around for 35 years. LOL
04-16-2010, 08:49 AM
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RE: WHAT ENGINE TO USE
Bill, be pretty careful about your engine choice. With a kit like that, you almost want to pick an engine based on weight rather than anything else. I'd suggest determining how much weight you need to have the CG within range, and then determining your engine with that in mind.
Power-wise, the suggested engines may be a bit much for a WW1 biplane of that size.
04-16-2010, 01:06 PM
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RE: WHAT ENGINE TO USE
What MikeL says is true, however... WWI birds had BIG, HEAVY engines (with very little power by today's standards) so they had relatively short noses. This means that a modeled version can handle the weight of a large engine (and usually needs additional nose weight) - AND, they had huge, kite-like wings, so they can usually lift that extra weight plus a piano or two..
This plane sounds similar in size to a Sopwith Camel that I had. The plane flew very well with an OS 70 4-stroke and it was still more power than it needed.
This plane sounds similar in size to a Sopwith Camel that I had. The plane flew very well with an OS 70 4-stroke and it was still more power than it needed.
