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Old Oct 01, 2012, 10:22 PM
GRIPDOG is offline
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Las Vegas
Question

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.
Thanks
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Old Oct 02, 2012, 10:39 AM
GRIPDOG is offline
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Thanks for all your replys. Guess I'll go with the 1.20
Old Oct 02, 2012, 11:16 AM
I TOBOR is online now
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Grip, how about some sound late advice, when in doubt, pick more cubic inches, it works every time.
Old Oct 02, 2012, 12:16 PM
GRIPDOG is offline
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Will do. Thanks Tobor.
Old Oct 02, 2012, 12:21 PM
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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 .
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Old Oct 03, 2012, 09:25 PM
KaP2011 is offline
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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.
Old Oct 07, 2012, 12:44 PM
LowlyElevated is online now
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pǝʇɹǝʌuᴉ sɐʍ I ǝsnɐɔǝq
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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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