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Building Tips and technical articles. => 1/2 A building. => Topic started by: Bootlegger on February 16, 2020, 05:39:02 PM
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Fellow's does any one have any plans, that work, of a 1/2A twister that I can borrow? Thanks a lot
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Fellow's does any one have any plans, that work, of a 1/2A twister that I can borrow? Thanks a lot
Hi Bootlegger, I don't have any 1/2A Twister plans; however, there is an easily available 1/2A Twister kit. :)
Either buy a Sig Akromaster kit or find the Akromaster plans; then put it on a diet and you'll have a
model that can be powered by a Paw .049-.061 Diesel or any 1.0cc glow engine. About 12 years ago,
I constructed an Akromaster, substituted some of the balsa and ended up with an excellent flying model
powered by an MP-Jet 1.0cc Diesel.
The model fly's on 45'X.008" lines and swings a 7" X 5" prop. the model weighs 10.75 oz. sans fuel.
the wing is covered with Micafilm. Best of luck; Tony G. D>K
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I have looked at my Akromaster several times and thought this would be a good 1\2a plane! May try it someday y1
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Motor,I am hoping to power it with a Cox Medallion 049, thanks for asking...
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I have looked at my Akromaster several times and thought this would be a good 1\2a plane! May try it someday y1
I have built an Akromaster. You should be aware that the kit does not come with plans. It only comes with an instruction sheet. The wing doesn't need a drawing of the wing because the ribs fit in notches in the leading and trailing edges.
I really doubt you could build an Akromaster (especially from the kit wood) that would be light enough to be flyable on a Medallion .049. The wing has 1/4" balsa spars top and bottom, and a 3/8" thick fuselage. I'm pretty sure you would have to draw up a set of plans for the wing and use a much lighter construction method and also utilize 6 pound wood throughout. I suppose you could build a model with the Akromaster's dimensions for a Medallion .049 but it would take a lot of redesigning and trouble.
Joe Ed Pederson
Cuba, MO
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You want about 150 - 175 sq. in. wing. Twister is pretty straight forward, might be easy to draw out on paper if you know the aspect ratio and general parameters of a 1/2a stunt plane. I should see if the printer can shrink my FTwister plans.
Motorman 8)
Hi Motorman and Joe, when I saw that Bootlegger was going to use a Medallion .049, I agree that the Sig Akromaster has
too much wing area for the Medallion. Motorman, the Medallion can pull a light(9-11oz) model up to 230sq"s. 150-175 sq"s
is really too small for the Medallion. Please refer to Barry Baxter's 1/2A Stuka stunt design(228 sq"), that flew beautifully(full pattern)
powered with a Cox Medallion .049. The Medallion is actually a better 1/2A(.049) than a TD. 049 engine. Not as powerful of
course, but much more tractable power delivery and fuel economy.
So I suggest you draw up plans for a 220-230sq" Twister, or find plans for Fast Richard's Pinto design. Again, Best of Luck;
Tony G :)
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RSM kits the Pinto and also my Sky Sport design. Either one could be good with a Medallion on the appropriate length lines.