stunthanger.com
Engine basics => Engine set up tips => Topic started by: Steve Fitton on August 31, 2009, 08:08:38 AM
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For those running non piped engines that are bemoaning the demise of Bolly and the retirement of Brian Eather, I found that one of the Mejlik props sold by Randy Smith gives very good results on my DS-60. Its the 12.5x5.2 three blade, and on the 60 its the best three blade carbon I have tried to date. I'm guessing it will be a good prop for ST 60s and four strokes as well.
When I tried a depitched Bolly 12x6.5 3 blade, it never seemed the motor could see any load until I had the pitch over 5.75 or more, at which point the windup was rather poor. The undercamber Mejlik with its greater diameter loads the engine exactly the same as the 12.75 x5.9 wood I was using, and I launch at the same exact RPM. I like the prop, and its going to stay on the airplane for awhile...
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Glad it worked well for you, I have many people now using that exact prop. Plus I have many more new props that are being produced now in 2 and 3 blades even have a few electric props , there is a electric 11.5 x 5.5 3 blade that works well on FP LA 40 46 engines as well as other IC motors
and the 13 inch plus 2and3 blade props for the bigger motors
Randy
Randy
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My Enya 61CXS Pro likes this prop too. Mejzlik web site says it is designed for non-piped 60's.
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We are thinking of buying a couple of those props since we only have 4 bolly props, and one is on a plane allready. Now undercamber creates a greater load on the motor, right?
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We are thinking of buying a couple of those props since we only have 4 bolly props, and one is on a plane allready. Now undercamber creates a greater load on the motor, right?
Yes these are a slight undercamber and they have more load from the UC
Randy
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Whatcha got for unpiped .75/.76's, Randy? ??? Steve
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Whatcha got for unpiped .75/.76's, Randy? ??? Steve
New 13 x 4.7 3 blades in stock, and coming new 14.5 x 5.5 wide 2 blade
Randy