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Wittman W-10 Tailwind

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Old 04-24-2013, 02:23 PM
  #1
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Default Wittman W-10 Tailwind

Just wanted to share a couple of pictures of my Tailwind project. Wing span is 42". Mostly made out of 1/32" balsa and 1/8" square sticks. Tail is solid 1/8" balsa. It's going to be electric powered but I know very little about motor sizing so I need to start doing some research.
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Old 04-24-2013, 02:54 PM
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Default RE: Wittman W-10 Tailwind

Kudos for building one of Steve Wittman's airplanes. My apologies but I know nothing of electric motors for airplanes.
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Old 04-24-2013, 03:45 PM
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Default RE: Wittman W-10 Tailwind

The Tailwind is one of my favorites. It is a smart design. Cant help on the motor either.
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Old 04-24-2013, 04:35 PM
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Default RE: Wittman W-10 Tailwind

I really don't have all that much experience in electrics myself but I would suggest looking around at a Axi 28xx motor with a 3S 3300 mAh pack. For the record, I have compared Axi motors to their BP Hobbies clones and while they look the same, they don't perform the same. The BP Hobbies equivalent would probably be a good match anyway and a lot less expensive.

Just my SWAG & uneducated $.02

Bob
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Old 04-24-2013, 06:24 PM
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Default RE: Wittman W-10 Tailwind

Thanks for the replies regarding motors. Might rethink it and just put a .10 or so glow engine on it. Electric is nice but glow is familiar to me.
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Old 04-24-2013, 10:53 PM
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Default RE: Wittman W-10 Tailwind

Decided to build a balsa cowl and made some progress on it today. Hoping to finish the cowl tomorrow.
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Old 04-26-2013, 10:36 AM
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Default RE: Wittman W-10 Tailwind

The cowl is basically done just need to do a bit of sanding and filling.
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Old 05-02-2013, 01:57 PM
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Default RE: Wittman W-10 Tailwind

Originally I had planned on putting simple strip ailerons on the Tailwind. After the wing was all sheeted however I decided to add flaps. Luckily the scale aileron and flap setup lent itself well to this situation as there are no control mechanisms enclosed by the wing.

The flaps are driven by 5/32" brass tubes with the ailerons being driven by a 4-40 torque rod running inside the brass flap tube. Makes for a clean wing with nothing hanging out in the breeze.
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Old 05-02-2013, 04:10 PM
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Default RE: Wittman W-10 Tailwind

That is how the real one does it; aileron torque tube run inside the flap one.
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Old 05-03-2013, 11:12 PM
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Default RE: Wittman W-10 Tailwind

Needs wing struts!

Will probably streamline all of this in the future for more go fasts.
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Old 05-04-2013, 04:45 AM
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Default RE: Wittman W-10 Tailwind

S. Wittman perfected this technique with his 1930's racers. Here's a 1/4 scale big Bonzo wing panel. You can see the torque tube levers on the right end. They have square drives on them so that the wings can be unplugged (just like the original) for transport.
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Old 05-08-2013, 10:01 PM
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Default RE: Wittman W-10 Tailwind

Coming along. Pardon the mess...
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Old 05-09-2013, 03:32 PM
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Default RE: Wittman W-10 Tailwind

More covering
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Old 05-10-2013, 03:32 PM
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Default RE: Wittman W-10 Tailwind

Lookin' good! Nice job with cowling.
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Old 05-18-2013, 12:01 PM
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Default RE: Wittman W-10 Tailwind

FYI Pete Miller did a slightly larger Tailwind in RCME magazine a few years ago. Here is a link, there are lots of pictures here but i did not see any details about the electric motor he used.

http://www.modelflying.co.uk/news/article/peter-miller's-wittman-tailwind/8587

Its a neat plane, love the ridder. i recall in his write up Pete said it was very effective. Keep up the good work.

Yojoelay
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Old 12-23-2013, 10:49 AM
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I'm still here! Control surfaces are permanently mounted now. Just need to install the electronics and it'll be ready to go.
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