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US 120 Lite and a OS FT-300

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Old 09-12-2012, 08:31 PM
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Bladejunkie
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Default US 120 Lite and a OS FT-300

I'm putting a OS Ft-300 on my well worn US 120 Lite and I'm kinda worried about ground clearance.Would a 18x12 MAS prop be enough prop for this combo?Anything over a 18" prop is pretty close to the ground.

Thanks for any advice Jim.
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Old 09-13-2012, 04:44 AM
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Default RE: US 120 Lite and a OS FT-300

I dont know about ground clearance but I bet it is going to be nose heavy by a big margin. have you mocked it up?
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Old 09-13-2012, 04:54 AM
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Default RE: US 120 Lite and a OS FT-300

TFF,it's already had a G-38 and CRRC40 on it.When I got the airframe I cut the firewall back about three inches,so I don't think it will be nose heavy.The FT-300 is lighter than the G-38,not much lighter/but still lighter.I think this engine will be easier on the airframe too!!!It's smooth as silk.

Thanks for the input Jim.
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Old 09-13-2012, 08:28 AM
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Default RE: US 120 Lite and a OS FT-300

Your ahead of the game.
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Old 09-13-2012, 10:39 AM
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Default RE: US 120 Lite and a OS FT-300

If you want more ground clearance for a larger prop, put larger wheels/tires on the landing gear or modify the landing gear.

My Saito FA300TTDP turns a 22X8 Zinger @ 7100 RPM static. It would take about the same HP to turn an 18X12 @ 8100 RPM.

Oops I entered the wrong data. 8100 sounds OK to me. Th e18X12 should work OK.
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Old 09-13-2012, 02:44 PM
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Default RE: US 120 Lite and a OS FT-300

Thanks guys,thats what I wanted to hear.Planes almost ready to go,just have to recover a few places on the fuse that were damaged when I lost a wheel in flight and ripped out the landing gear.

Later Jim
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Old 09-14-2012, 01:07 PM
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Default RE: US 120 Lite and a OS FT-300

That sure is a lot of motor on a small aircraft - have fun!
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Old 09-15-2012, 04:14 PM
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Default RE: US 120 Lite and a OS FT-300

What's that little old Cobra got in it?
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Old 09-16-2012, 03:25 AM
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Default RE: US 120 Lite and a OS FT-300

Just enough. 351c
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Old 09-16-2012, 10:38 AM
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Default RE: US 120 Lite and a OS FT-300

351c,thats what I had in my 69 Mustang,so I guess we both know about too much power right?

Later Jim
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