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SF120 performance

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Old 03-30-2004, 07:21 PM
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DHammer
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Default SF120 performance

Hello Dave, quick question. I have a SF120, sweetest running engine in my fleet. I did have it in a plane that weighed 8 1/2 lbs. Was swinging a 16X8 at 9200. Gave me unlimited performance on the plane. It's been idle for a year and now I want to put it in a plane that weighs in about 9 3/4 lbs. Is the 9 3/4 lb plane too much for this engine swinging the same size prop?
Thanks,
Dhammer
Old 03-31-2004, 09:19 AM
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Dave Shadel
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Default RE: SF120 performance

Depends on what type and how much wing loading. A Cub at that weight vs. a pattern airplane at that weight will be two totally different animals.
Old 03-31-2004, 08:33 PM
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DHammer
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Default RE: SF120 performance

Good point. Fun fly 3D type with a wing loading right about 16OZ per Sq Ft.
Old 04-01-2004, 11:02 AM
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Dave Shadel
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Default RE: SF120 performance

I'd say it will work fine. You may have to go with a larger diameter, lower pitched prop. Be ready to experiment.
Old 04-01-2004, 07:46 PM
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Default RE: SF120 performance

Thanks Dave, Will do.
Dhammer
Old 04-01-2004, 08:04 PM
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Default RE: SF120 performance

Good Flying!

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