OS 95 or 1.20? - RC Groups
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Oct 01, 2012, 10:22 PM
Las Vegas

OS 95 or 1.20?

Iím either going to get a new OS 1.20 or a OS 95. for the 9lbs. Edge 540 Iím building.
Is there a big difference in fuel consumption between the two engines.
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Oct 02, 2012, 10:39 AM
Las Vegas
Thanks for all your replys. Guess I'll go with the 1.20
Oct 02, 2012, 11:16 AM
Registered User
I TOBOR's Avatar
Grip, how about some sound late advice, when in doubt, pick more cubic inches, it works every time.
Oct 02, 2012, 12:16 PM
Las Vegas
Will do. Thanks Tobor.
Oct 02, 2012, 12:21 PM
Methanol, The Cool Fuel !
Gary Cee's Avatar
The OS 95 is still only around in small numbers but all the tests say it is a fine engine . Check the weight difference . If your plane winds up tail heavy , the added weight of a bigger lump may be OK . It the plane is already nose heavy weight may be a detriment. Bigger engines often shake a bit more as well as the requirement for a heavier fuel load . Some planes fly well "on the wing" others make better use of a bit more power . The Edge can probably make good use of more power so long as the weight/balance issues are resolved first .

Sometimes it takes a bit more than 24 hours for people to offer advice . It is free after all .
Oct 03, 2012, 09:25 PM
Registered User
KaP2011's Avatar
I just got a new OS 95v the other day and based on the manual it should be pretty good on fuel consumption. The manual states that a 10oz tank should last 12-15 min. However, if I had a 9lb Edge 540 I would go with the 120.
Oct 07, 2012, 12:44 PM
pǝʇɹǝʌuᴉ sɐʍ I ǝsnɐɔǝq
LowlyElevated's Avatar
Never had any experience with the 95s, but I do have one of the older pre-fix 91s. I stuck a .46 needle vavle on it 4 months ago and now it it starts on the first spin witht the starter every time. It will pull my 60 size u-can-do vertical all day.
However, It refuses to run on anything I have tried but a 14-8 prop. That is the magical ticket, it seems.

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