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  • October 22, 2020, 10:55:48 PM

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Author Topic: 1/2A Twister plans  (Read 408 times)

Offline Bootlegger

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1/2A Twister plans
« on: February 16, 2020, 05:39:02 PM »

 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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Gil Causey
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Offline paw080

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Re: 1/2A Twister plans
« Reply #1 on: February 17, 2020, 03:12:07 PM »
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

Online Motorman

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Re: 1/2A Twister plans
« Reply #2 on: February 17, 2020, 03:25:48 PM »
What size engine?
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Offline ray copeland

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Re: 1/2A Twister plans
« Reply #3 on: February 17, 2020, 05:06:29 PM »
I have looked at my Akromaster several times and thought this would be a good 1\2a plane! May try it someday  y1
Ray from Greensboro, North Carolina , six laps inverted so far with my hand held vertically!!! (forgot to mention, none level!) AMA# 902150

Offline Bootlegger

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Re: 1/2A Twister plans
« Reply #4 on: February 17, 2020, 07:21:56 PM »

  Motor,I am hoping to power it with a Cox Medallion 049, thanks for asking...
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Offline Joe Ed Pederson

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Re: 1/2A Twister plans
« Reply #5 on: February 19, 2020, 12:34:49 PM »
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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Re: 1/2A Twister plans
« Reply #6 on: February 19, 2020, 02:04:57 PM »
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)
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Offline paw080

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Re: 1/2A Twister plans
« Reply #7 on: February 19, 2020, 07:00:46 PM »
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   :)

Offline Larry Renger

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Re: 1/2A Twister plans
« Reply #8 on: February 24, 2020, 08:37:52 PM »
RSM kits the Pinto and also my Sky Sport design. Either one could be good with a Medallion on the appropriate length lines.
Think S.M.A.L.L. y'all and, it's all good, CL, FF and RC!

DesignMan
 BTW, Dracula Sucks!  A closed mouth gathers no feet!

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