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General control line discussion => Open Forum => Topic started by: Brad B on September 26, 2008, 05:14:16 PM

Title: aviastar engines
Post by: Brad B on September 26, 2008, 05:14:16 PM
Does anyone know anything about these engines?  Aviastar 46 and a 53  I was just wondering about the quality of them.   Thanks, B
Title: Re: aviastar engines
Post by: Steve Helmick on September 26, 2008, 07:57:05 PM
 http://www.sigmfg.com/cgi-bin/dpsmart.exe/MainMenuFV4.html?E+Sig (http://www.sigmfg.com/cgi-bin/dpsmart.exe/MainMenuFV4.html?E+Sig)

Click "engines" on the menu in the left margin, then "R/C Gow Engines 2 Cycle .51-.60"
(http://www.sigmfg.com/thumbs/AVI53.html.jpg)

I recalled seeing them mentioned in a SIG ad, but didn't investigate at the time. So, I just did. Looks a lot like the old series of Magnum XL engines, with maybe some extra case fins added. I'd bet that the same case casting is used for both, so probably the .53 is lighter than the .46 (more air inside). The Magnum XL .53 is fairly popular here in the NW, so I think you might have found a gem. The parts might well swap, too. Keep us posted!  y1 Steve
Title: Re: aviastar engines
Post by: Greg L Bahrman on September 26, 2008, 09:44:22 PM
From the Sig site. The .46 is 13.4 oz. at $49.99 and the .53 is 14.4 oz. at 69.99. A little on the heavy side but the prices are really reasonable for sure.
Title: Re: aviastar engines
Post by: Vincent Corwell on September 27, 2008, 12:37:22 AM
I saw these on Brodaks web site
and at different prices ?

Vincent
Title: Re: aviastar engines
Post by: Ralph Wenzel (d) on September 27, 2008, 03:31:50 AM
Quote from: Vincent Corwell on September 27, 2008, 12:37:22 AM
I saw these on Brodaks web site
and at different prices ?

Vincent

Whew! Ambitious pricing, compared to SIG!

Ralph
Title: Re: aviastar engines
Post by: Brad B on September 27, 2008, 07:17:14 AM
Really expensive venturi I suppose.   ~^ 
Title: Re: aviastar engines
Post by: Andrew Borgogna on September 27, 2008, 09:58:06 AM
It would seem Sig has redefined the ABC engine.  Their "true ABC construction" has a "steel alloy" cylinder and I always thought it was chrome plated brass oh well live and learn. ~^  Still for the price it might be worth investigating.
Andy

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For instance, the connecting rods use the same aluminum alloy as found in some full size aircraft engines. Crankshafts are one piece hardened Cr steel. A specially developed "KK" bronze alloy is used for the conrod bushing which allows it to withstand high RPMs. Cylinders are made of a special heat treated Cr steel alloy to insure a hard and true cylinder that will not distort at high temperatures. Piston rings (1.2 - 2.0 in3 engines) are made of the same steel alloy as found in some racing motorcycles. The .46 in3 is true ABC construction. All engines contain high quality dual ball bearings.
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Title: Re: aviastar engines
Post by: Leester on September 27, 2008, 05:35:33 PM
The Super Tigre 51 venturi and nva work in them just fine.
Title: Re: aviastar engines
Post by: Steve Helmick on September 27, 2008, 05:44:25 PM
The steel sleeve probably applies to larger ringed engines...which may include the .53. In any case, advertising folks don't always know what they're talking about, right?  R%%%% Steve