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10-15-2007, 07:20 AM
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#1 |
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Flyin' Around
 Join Date: Jun 2006
Location: The Netherlands
Age: 30
Posts: 6
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Butterfly ARF - Engine OS 55?
Hi,
I'm looking for a new engine for my new profile. I want the best 2 stroke engine and not the cheapest. I'm thinking of the O.S. Max 55AX. Please advice. Butterfly: Wing Span: 48-1/2in(1235mm) Length:44-1/2in(1130mm) Wing Area:750sq in(48.4sq dm) Weight: 3.6-4lbs(1650-1800g) http://www.kuzarc.com/index.php?Page=39 
Last edited by bjlevi; 10-16-2007 at 05:20 AM. |
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10-15-2007, 10:27 AM
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#2 |
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tissue ? cry baby jack wagon!
 
Join Date: Jan 2006
Location: pyote,texas
Age: 58
Posts: 2,651
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Re: Butterfly ARF - Engine?
don't think you could ever go wrong with os engines
__________________
Life's journey is not to arrive at the grave >safely and in a well preserved body,but rather to skid in > sideways,totally screwed up,worn out,shouting,"oh damn what a fine ride! AMA 98634 > HEY I GOT A DIVORCE----HELL YEA  > Futaba, FROMECO:a good way to get a charge out of life  ,,3w all the way for a good day |
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10-15-2007, 11:25 AM
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#3 |
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Bad-ass Super Contributer!
Join Date: Mar 2006
Location: Malaysia
Age: 39
Posts: 286
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Re: Butterfly ARF - Engine?
I flew the brother/sister of the butterfly, a plane called the air kller, i used an MVVS 49 on it, I think an os 50 wll be good enough, a 55 will be ballistic. Whichever you choose, your in for a lot of fun. A few guys over here have flow it with Thunder tiger 46's and APC12.25x3.75 props, with good results as well.
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10-15-2007, 03:33 PM
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#4 |
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Flyin' Around
Join Date: Jun 2006
Location: The Netherlands
Age: 30
Posts: 6
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Re: Butterfly ARF - Engine?
The OS 55 is only 20 grams (0.7 ounce) heavier.
I only am worried the OS 55 is to heavy. Is it? (ballistic souns good) And I want to use a APC12.25x3.75 prop on it. |
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10-16-2007, 10:55 AM
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#5 |
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Bad-ass Super Contributer!
Join Date: Mar 2006
Location: Malaysia
Age: 39
Posts: 286
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Re: Butterfly ARF - Engine?
Well lighter is always better, but your not going to feel 20grams additional weight. With the OS55, you might be able to go with a 13x4W instead of the 12.25x3.75, but as I have not run that motor persoanlly, I cant be sure of that. Maybe someone with the motor can chip in.
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10-16-2007, 01:40 PM
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#6 |
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GiantStyle Yapoleno Hucker!
Join Date: Jan 2006
Location: Cordova, TN USA
Posts: 1,283
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Re: Butterfly ARF - Engine?
Webra .50 or the OS .55AX would both be fine choices. The Webra would be the lighter of the two, and the .55 will probably have an edge on power....
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10-17-2007, 01:48 AM
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#7 |
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Flyin' Around
Join Date: Jun 2006
Location: The Netherlands
Age: 30
Posts: 6
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Re: Butterfly ARF - Engine?
Thanks
I'm going to order the OS 55 with the 12.25x3.75 prop. What about servo's? I want to use the 3001, but aren't they to slow? Other suggestions? Last edited by bjlevi; 10-17-2007 at 06:43 AM. |
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10-17-2007, 09:21 AM
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#8 |
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GiantStyle Yapoleno Hucker!
Join Date: Jan 2006
Location: Cordova, TN USA
Posts: 1,283
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Re: Butterfly ARF - Engine?
BJ, I've always found that the 3004 is a pretty good servo for a standard profile. Especially good when run on 6v packs. There are plenty more expensive servos, but the 3004 will do the job.
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10-26-2007, 02:17 AM
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#9 |
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Flyin' Around
Join Date: Jun 2006
Location: The Netherlands
Age: 30
Posts: 6
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Re: Butterfly ARF - Engine?
I've ordered the OS 55, four 3004's, HS-81 and a 5cell 6V battery pack with a BEC.
Can't wait to build it. |
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