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Old Aug 10, 2012, 03:20 PM
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Joined Apr 2008
46 Posts
Saito FG 21 vs. FG 17

Hello all,

i am contemplating a GP Super Skybolt that calls for up to a .91 four stroke.

I like the Saito FG 17 for this plane (gas version of the Saito 100) but I believe the FG 21 would be more useful on other planes down the road. The FG 21 is four ounces heavier and $50 more. Are both engines generally free of problems?

I am not looking for the 3D performannce of an Ultimate Biplane. I want a smooth, mildly areobatic, non 3D biplane.

Anyone have an opinion on flying the GP Super Skybolt with an FG 21 instead of an FG 17?

Thanks for your help.

John T.
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Old Aug 10, 2012, 04:09 PM
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GeetarJoe's Avatar
United States, LA, New Orleans
Joined Sep 2011
650 Posts
Four oz is not a lot on a short nosed airplane, in fact you may need it. I would go with the 21 and just put on a large diameter low pitched prop. Something in the 6-8 pitch range. That will keep the speed down and the thrust up.
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Old Aug 11, 2012, 02:39 AM
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Toysrme's Avatar
Birmingham, Alabama
Joined Jun 2002
2,977 Posts
my issue is thinking about other projects down the road. i dont see how that logic applies after a basic trainer. frankly. it's not even good logic for a basic trainer. (for what a .40 sized engine always cost... for heaven's sake just buy another engine and have *two* planes that fly...). if you like the fg-17 go that route.

GeetarJoe is also spot on about 4oz not being that big of a deal in a short nosed biplane of that size
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Old Aug 12, 2012, 08:30 AM
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United States, TX, Palestine
Joined Dec 2007
165 Posts
No substitute for cubic inches.....
My bolt sports a satio 100. dam fine combination. She's not overly powered but isnt a weinie either. Flys nice and scale and smooth with just enough for that little something extra.
Go with the FG21 and you wont be disappointed.
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