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Yellow Zero Flap Retrofit

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Old 07-08-2013, 07:56 AM
  #1
Check6
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Default Yellow Zero Flap Retrofit

I will be installing flaps on a Yellow Zero that was already built and the flaps were omitted. Don't know why, but these will help in landing this already heavy fighter. I have outlined the flap area using Yellows guideline. I plan on using the flap skin that I removed thus eliminating any repainting.
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Old 07-08-2013, 09:51 AM
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Default RE: Yellow Zero Flap Retrofit

OK, already have a change in plans. After cutting out the perimeter of the flap outline. There was no way of removing the skin from the foam in one piece. I forgot how tightly the skin was glued to the foam. Had to remove everything by gouging out the foam and sheeting. Will be building new flaps with ply and ribs. I do have the flap pockets cleaned out.
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Old 07-08-2013, 10:34 AM
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Default RE: Yellow Zero Flap Retrofit

Hi Fred,

The flaps on my YA zero were balsa sheet with the correct airfoil shape. I think ply with ribs is actually more scale anyway. Go for it.

Carl
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Old 07-08-2013, 04:31 PM
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Check6
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Default RE: Yellow Zero Flap Retrofit

Hi Carl,
I have to do the built up flaps since I don't have any airfoil balsa sheet. I think they will look better. I made the leading edge sheet for the flaps. I glued on the hinge blocks and made pockets in the wing to fit everything in. Side formers are glued in also. Ready to make the flaps.
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Old 07-08-2013, 05:52 PM
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Default RE: Yellow Zero Flap Retrofit

Looks great Fred. You make this stuff look way too easy!!!!
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Old 07-08-2013, 06:06 PM
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Default RE: Yellow Zero Flap Retrofit

Thanks Tony, I've had a lot of practice working on your airplanes. LOL. This is not my plane, I'm doing the work for another friend Dan Carlson from Indiana.
Later,
Fred
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Old 07-09-2013, 04:35 AM
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Default RE: Yellow Zero Flap Retrofit

OK, Made the flap blanks out of 1/16 ply. Layed out the rib location. Glued on the leading edge and ribs.
Starting to look like flaps!!
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Old 07-09-2013, 04:37 AM
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Default RE: Yellow Zero Flap Retrofit

Flaps rough sanded and dry fitted.
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Old 07-10-2013, 03:22 PM
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Default RE: Yellow Zero Flap Retrofit

Got the first servo pocket cut. Will be driving the flap internally.
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Old 07-10-2013, 04:12 PM
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Default RE: Yellow Zero Flap Retrofit

Good Job!
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Old 07-10-2013, 07:31 PM
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Default RE: Yellow Zero Flap Retrofit

Thanks, Bob.
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Old 07-13-2013, 10:49 AM
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Default RE: Yellow Zero Flap Retrofit

Servo pocket lined with balsa and servo mount cap made. Flap is dry hinged
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Old 08-06-2013, 07:48 PM
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Finishing up this project. Servos are mounted and linkages are made. Made a plywood horn and the clevis hole has a piece of nyrod glued in for a bearing surface. Flaps are dry hinged for fit. Glassing and finishing next,
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Last edited by Check6; 08-07-2013 at 02:01 AM.
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Old 08-06-2013, 10:59 PM
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if you make a post the 3rd icon on the top of the message box from R-L is the image location click that and you can load pics
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Old 08-07-2013, 01:52 AM
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Thanks Tim,
Here are some with the flap installed and clevis attached
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Old 08-23-2013, 03:05 PM
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Flap retrofit is completed
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