OS 70 Surpass II, Break in, Props
06-04-2003, 04:48 PM
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OS 70 Surpass II, Break in, Props
anyone have a goot brea in procedure and prop recomendations for this motor on a laser 3d. I just cant seem to get the top end right. tnx
06-05-2003, 11:23 PM
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O.S. 70 Surpass II
Great engine. What do you mean about the top end. How much have you run it?.......You should break it in just how it says in the manual. Maybe a little extra oil in the fuel. I run this engine on a Freestyle with a 13X6 prop, and it will hover at 3/4 throttle or less. It really turns this plane into a monster. What size is the Laser ?
Bobbdd
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06-06-2003, 02:12 AM
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OS 70 Surpass II, Break in, Props
Like above, 13x6, I run it on Cool Power 4 stroke fuel, just run it rich for the first 1/2 gallon of fuel, gradually ask a little more of it, fly around, after the first gallon it will purr like a kiten, superb engine, one of those set it and forget it types. Rich running at the top end is the answer.
06-06-2003, 11:05 AM
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OS 70 Surpass II, Break in, Props
thx, i was way way way to rich on the top end so i leaned it out to the point where shes still rich but flyable. Plus she was over proped with a 13x8 and with all that pitch the prop was stalling in a hover. The laser is a 50 - 60 sized plane with a 46 stamp on it.
P.S. Also running Byron 15/20. Dont particularly care for this brand, whats your opinions?
P.S. Also running Byron 15/20. Dont particularly care for this brand, whats your opinions?
06-06-2003, 11:29 AM
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Fuel
I always use Morgan cool power or the Morgan Heli fuel with 3-4 % castor oil added. You can get your LHS to order you a bottle of pure castor from I think Morgan fuels. A few people will say don't use castor in Four strokes, but others will say you must have at lest a small percentage of castor. I have been using this mix, and not had any problem the past two years, and that is running a Magnum 30 FS, Satio 40 FS, O.S. 52 FS, O.S. 70 FS
bobbdd
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06-08-2003, 12:46 AM
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I never used tower fuel
.........People,magazines, my local hobby shop, all say don't use any fuel, if the maker will not list what is in it ! Unless you fly quite often, the fuel is not your biggest cost, buy the good stuff !
bobbdd
bobbdd
