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Author Topic: O.S. -.50 SX  (Read 1636 times)

Online Paul Taylor

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O.S. -.50 SX
« on: July 10, 2010, 07:25:06 PM »
Would this make a good C/L engine?

More power then a LA .46?
Paul
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As my coach and mentor Jim Lynch use to say every time we flew together - “We are making memories

Offline Greg L Bahrman

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Re: O.S. -.50 SX
« Reply #1 on: July 11, 2010, 01:29:02 PM »
Probably does make more power than an LA46 but it also weights 14.33 ounces according to the Tower specs and the LA46 is around 9 ounces. You will be hard pressed to find a motor more user friendly the LA46.
I couldn't find it in the Tower motor section, but I did find it as a Heli motor. I don't know anyone who uses one. Might be better to stick with motors that are tried and true especially if your not an engine expert. For some reason the 50 size is not a real popular size at my flying field. There is a lot good info on the ST51 though. As far as more power I have used up to 15% nitro in my LA46 with success. Good luck. Grins
Greg Bahrman, AMA 312522
Simi Valley, Ca.

Online Paul Taylor

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Re: O.S. -.50 SX
« Reply #2 on: July 11, 2010, 01:57:08 PM »
Thanks Greg for the feed back.
I am looking for more power, just hate to go to a $300 engine. I love them blue engines!

I have been looking at the ST's but not sure they are worth the $$$. Seem like you have to rework them. I may wind up getting one if I can find a used one at a fair price.
Paul
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Offline Bill Barber

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Re: O.S. -.50 SX
« Reply #3 on: July 11, 2010, 02:22:26 PM »
   Paul , Greg & I fly together and we both love our LA .46's . Very easy motor to set up with Lot's  power .
But I checked Tower Hobbies and you can get a new ST.51 for $89.99 .  I know some people had good luck with them stock , even if you had it
modified for $80. ,  you are still below $200.
   Other motors you could consider; Randy Smith sells the  Enya .50 SS for $155.95 and Brodak has the Avistar .53 for $129.99 and the Avistar .61 for $149.99 .
   Bill
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Offline Greg L Bahrman

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Re: O.S. -.50 SX
« Reply #4 on: July 11, 2010, 09:32:07 PM »
Paul,
I don't what your plan is but you might stick with the LA46 and go to a smaller plane. I have seen a lot of good flights by the Vector 40 (Randys design) using the LA46. Cheers
Greg Bahrman, AMA 312522
Simi Valley, Ca.

Offline Bill Adair

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Re: O.S. -.50 SX
« Reply #5 on: July 11, 2010, 11:02:15 PM »
Paul,

Sam's has the Avistar 53 on sale for $99, but the link doesn't seem to work. Check it out on Sam's Bargain Hanger page.

Bill
Not a flyer (age related), but still love the hobby!

Online Paul Taylor

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Re: O.S. -.50 SX
« Reply #6 on: July 12, 2010, 07:22:05 AM »
Thanks guys for the info. I have a few LA 40's and 46's and I love them one flip starts and the user friendly setup.

I am just looking for a engine that will carry some of my porkers a little better. Just until I learn how to build lighter. HB~>

Not really needed, just something I want to test out.
Paul
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Offline Greg L Bahrman

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Re: O.S. -.50 SX
« Reply #7 on: July 12, 2010, 01:32:41 PM »
Well I don't know. So you have a heavy plane and you go to a bigger motor and end up with a heavier plane. Performance is in the weight of the plane, so just because you go to a bigger motor doesn't mean you will have a better flyer ???? even if it does go vertical better ????
Greg Bahrman, AMA 312522
Simi Valley, Ca.

Online Brett Buck

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Re: O.S. -.50 SX
« Reply #8 on: July 12, 2010, 03:46:02 PM »
Well I don't know. So you have a heavy plane and you go to a bigger motor and end up with a heavier plane. Performance is in the weight of the plane, so just because you go to a bigger motor doesn't mean you will have a better flyer ???? even if it does go vertical better ????

   Actually, a big motor and a *light* airplane can be an issue, too. I have recently seen examples of a mid-50 oz airplane with a PA65 that would have greatly benefited from 10 more oz, even just dead weight,  or a smaller engine.

     Brett

Offline Martin Quartim

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Re: O.S. -.50 SX
« Reply #9 on: July 12, 2010, 10:45:45 PM »
Hi Paul,

I have been very lucky with the Enya Engines and the Enya SS50 has probably one of the best power/weight ratio in the market. It is only 0.8Oz heavier then the OS 46LA and if you use my setup it will carry easily anything up to 68oz.

This engine starts just by twisting the spinner backwards and is very very friendly to work with. We have tried many props and venturi openings  with success giving us a broad range of power to work with, very very friendly engine indeed.

For big and heavy models we are getting the best performance using low pitch props and launching above 10k rpms. In this mode it works 4-2-4 (if the model is heavy enough to load the engine to break into 2, if not it will just keep on 4-4-4).

No need to get it reworked, all you may need to do is ad one head shim. You can use props like APC 12.25x3.75, 12~12.5x3.75 3 blades carbon fiber and a JXF 13x4 wood (a friend clipped one to 12.8" and is working very well on his Score).

Martin
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Offline richardhfcl

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Re: O.S. -.50 SX
« Reply #10 on: July 13, 2010, 08:51:41 AM »
Paul,

      I think that I fully understand your needs:  a reasonably priced engine which will provide a bit more power than the LA .46.
I believe that Martin hit on the answer with the Enya 50.

     Although it will cost you more than the Tower priced Tigre .51, it is an 100 % reliable engine that can even use the muffler
that comes with the engine.  Certainly, one hears of instances of the S.T.'s which seem to work beautifully without further
work, many do come with flaws and problems needing to be addressed before you can fly them with any feeling of confidence.
(Of the three that I purchased, only one worked even reasonably well without further work.)

     If you would like to be  pioneer, you could purchase an Aviastar.  I'm actually curious as to how something other than the
prototype actually works.

     Of course, if you have major problems, the seller, whether it be Tower or Brodak, will be good for the return or exchange.
I, personally, don't like to screw around with returns or custom work if I can avoid it, and would be leaning towards spending
a little more for an engine with known quality control, an Enya.

     It all comes down to "You pays your money, you takes your chances."

     Please keep us informed how your search progresses.

     Best regards,

     Richard Ferrell
Richard Ferrell

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Offline Leo Mehl

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Re: O.S. -.50 SX
« Reply #11 on: July 13, 2010, 09:24:23 AM »
Go for the controline version of the Super Tigre 51, It is reasonably priced and the chinese version is just as good as the Italian version. For the price its a good buy that will give you hurs of flying. I have seen them used on smaller planes with good results straight out of the Box. H^^ H^^ H^^ H^^ HB~>

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