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HomeAircraftHelicopterEngines Plugs Mufflers Fuel › OS-Why not a .60?
04-11-2010 04:49 PM  8 years agoPost 1
Mikerobe

rrVeteran

Green Turtle Cay,Abaco, Bahamas.

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If OS provide a super-duper .55, why not also offer a .60?

There must still be a need for .60's, everytime you see one in the classifieds or ebay it sells for at least the asking price.

The lot I got is not a lot, but I thank God a lot for the lot I got!

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04-11-2010 05:43 PM  8 years agoPost 2
Dr.Ben

rrMaster

Richmond, VA, USA

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It's not all about displacement. It's about how much larger can you go with the current case and rear bearing size. As it stands, the rear bearing on these high powered 50's is being taxed to the ragged edge. After that, you have to create the mainstream model design to fit the engine. Typically the two go hand in hand. By the time you build a model and driveline large enough to handle the extra size of the 60 crankcase and the rear bearing it ought to have for reasonable longevity, you've come full circle and will be back to looking to put a 90 in where that 61 was mounted. The marketplace wants a smaller, lighter, less costly model, and the 50 sized models with engines of that same physical dimension fit nicely into that niche.

Ben Minor

Peak Aircraft/Team Minicopter Team Futaba Team Kontronik USA

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04-11-2010 06:34 PM  8 years agoPost 3
outhouse

rrVeteran

auburn ca

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also a 60 provides only a small amount of extra power over a 55 at best, but takes hundreds to modify the new frame to fit it.

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04-11-2010 08:15 PM  8 years agoPost 4
Mikerobe

rrVeteran

Green Turtle Cay,Abaco, Bahamas.

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I could probably use the .55 to replace the .61sx-h in my 1990 Eagle, but as stated, crank/crankshaft dimensions are not applicable.
I definately would not want to put a .90 in this model because I love the way it flies using existing gearing/blades.
My Freya with a .70, being heavier and longer on the other hand would probably fly well with a .90, however, I love the way it flies with the .70 plus the fuel economics.
Am I the only one left flying OS.61's?

The lot I got is not a lot, but I thank God a lot for the lot I got!

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04-11-2010 10:45 PM  8 years agoPost 5
LonR

rrElite Veteran

Macomb,Mi

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If your talking about a 50/600 size heli,the OS 70 is the best motor for it.Way more power over the Hyper 50,YS 56,OS 55 and the flight times are 30 secs to 1 min more .Its about $50.00 bucks to install the OS 70 SZ-H so its not hundreds of dollars.You'll need to shorten the crank so it doesn't touch the starter shaft,a $14.00 dollar pinion and a Thundertiger motor mount.If you have a .

Oops,your talking about replacing your OS 61.Just put a OS 70 SZ-H in it,heres one in my Raptor 90 with the small fuel tank.Check out the flight time too,makes awesome power and sips fuel .

Watch at YouTube

600LE,OS55,OS PowerBoost pipe,Align 610's,Spartan

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04-11-2010 11:20 PM  8 years agoPost 6
Mputu

rrVeteran

Killeen, TX

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NOt bad, it's good idea.

Fly hard, Land safe

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