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Old 08-20-2006 | 11:01 PM
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Default OS .40 LA

Just bought myself my 2nd plane (but new to gas planes) and ended up getting the OS .40LA, is this engine any good? I know all O.S. engines are really good and should be trouble free. I take good care of all my nitro engines (cars), and would like to know if anyone has had any expirence with this engine?

Cheers!
Old 08-21-2006 | 12:04 AM
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Default RE: OS .40 LA

The LA series engines are great all around engines. They're easy to tune and seem to last forever. I have 4 .40 LA's, and I beat them up pretty good. I've never broken one. I use them when I make my SPAD planes. Some fly, some just "Fall with style". For a trainer or small sport plane, (something that's going to crash a couple times) you can't beat them (literally).
Old 08-21-2006 | 01:25 AM
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Default RE: OS .40 LA

they get good mileage! there is another thread where I stated that mine flew 10 minutes on a 4-5 oz tank! but it was a trainer so I was puttering around , a spad is heavier and would take more throttle...Rog
Old 08-21-2006 | 06:30 AM
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Default RE: OS .40 LA

I have a .65 la on my cloud dancer, and I have to land because it flies so long on 10 oz. after about 10 mins I still have a 1/4 tank left. [X(][8D] I have a .46 la and it is the same way... they are great. I havent had any probs with them.
Old 08-21-2006 | 07:47 AM
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Default RE: OS .40 LA

Agree, great little engine, easy to operate but not very powerful so need to set reasonable expectations about what it can haul around. My 2.8Kg plastic bodied trainer was just a little too heavy to ROG if the grass at our strip was anything approaching long (i.e overdue a cut).

Regards,
Andy
Old 08-21-2006 | 04:30 PM
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Default RE: OS .40 LA

The little engine that could!!
I like LA's in sport planes, they are not top muscle and don't like to run too lean (no engine likes this) but they are reliable and rugged
Old 08-21-2006 | 11:22 PM
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Default RE: OS .40 LA

Im really glad to hear that. Yeah I know, i never run my engines lean i like them on the rich side. As I say, im only learning to fly a gas plane and I wont be flying very fast but just puttering it around. And I did want an engine that will give me trouble free. Thanks everyone!
Old 08-22-2006 | 09:13 AM
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Default RE: OS .40 LA

hitman
Do the engine a favour and use around 22% oil and preferably with a lot (if not all ) castor. It's a plain bearing engine and if you use castor the crank and bush will likely never wear out. Castrol M is quite widely available here in Oz, I get mine from a Caltex fuel depot on occasions. Make sure the steel shim thrust washer between the crankcase and prop driver is well lubricated before using an electric starter.
Old 08-22-2006 | 09:23 AM
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Default RE: OS .40 LA


ORIGINAL: downunder

hitman
Do the engine a favour and use around 22% oil and preferably with a lot (if not all ) castor. It's a plain bearing engine and if you use castor the crank and bush will likely never wear out. Castrol M is quite widely available here in Oz, I get mine from a Caltex fuel depot on occasions. Make sure the steel shim thrust washer between the crankcase and prop driver is well lubricated before using an electric starter.
what he said, I buy a gallon of cool power and add benol..(pure castor oil) to fill the jug to the top..alittle messier to clean up, but you dont have to worry about the engine... great for breakins too, benol is at tower.. a quart goes a loooong way...Rog
Old 08-23-2006 | 05:55 AM
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Default RE: OS .40 LA

Thanks! for the advice guys. Yeah im a Castor fan too. Now just a quick question...

Do the Heli guys use a smoke additive to their fuel or is it just high oil content? I want my engine smokin' (in a good way )

Cheers!
Old 08-23-2006 | 09:02 AM
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Default RE: OS .40 LA

Helis do use more oil than usual but it seems worse (smoke-wise) because the exhaust isn't being hit by a direct blast of 100MPH air straight from the prop. I use 25% all castor in my ST G51 (no, not in a heli!) and it leaves a smoke trail but nothing that you'd write home about
Old 08-24-2006 | 10:52 PM
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Default RE: OS .40 LA

arhh well thats true too, thanks anyways. I use 20% oil in all my car engines, they run great with it. Havnt missed a beat, and they too smoke really well but not as much.

Ohh well not to worry. Thanks guyz.

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