1705493-AndyW
Posts: 1835
Joined: 1/17/2003 From: Timmins, ON, CANADA Status: offline
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I run and fly mostly small engines. The last few years mostly 1/2A and mostly Norvels. My experience with fuel in the smaller engines is that yes, castor is necessary in SOME engines, notably the Cox line and the VAs from Russia. The issue is the shrouded wrist pin with the VA and the ball socket rod with Cox. In both cases, there's much less fresh fuel/oil circulating in these areas because of the design. If you DON'T use lots of castor in these engines, you'll have premature wear. HOWEVER, in the Norvels, I've run Cool Power 25% for a few years now and have not had any problems. In fact, I've found superior power, idling and acceleration with Cool Power. The worst fuel, at least for 1/2A, was Byrons 1/2A formula. Same day, same prop, same engine and the CP was far superior. In fact, the Byron was the worst fuel these engines had ever seen. On top of that, the Byron was specified for 1/2A and the CP is NOT. But Norvels are unique, won't say the same thing for any other brand of small engine. On the same note, I had run, for years, Morgan's 25% Sidewinder fuel on small engines with no problems whatsoever. And many of these were Cox engines. Go figure, especially in that Sidewinder fuel is for CARS and has only 10% oil. And recent flying with Sidewinder on a Norvel .074 has shown good power and good throttling. ??? Beats me. But I DO like Rich's Brew, especially in that he'll mix up any formula you want,, like 60% nitro with 25% castor. Just what I needed for TD .010s and TD .020s. Throttling is much improved with the increased nitro. Yes, expensive, but not on a per flight basis. Here, http://www.youtube.com/profile?user=hopeso You can see a custom heli engine turning a 6 X 3 Grish prop at 19K plus on 25% Cool Power. Not bad. Same goes for a modified Brodak .049 in one of the other videos.
< Message edited by 1705493-AndyW -- 9/7/2006 6:30:27 AM >
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Andy Woitowicz
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