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Andy Sheber Pitts s1s

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Old 12-21-2012, 11:13 AM
  #251
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Default RE: Andy Sheber Pitts s1s

The following is one of the reasons not much work will be done over the next few days.
Have to put other thing's together. What ya'll think, will it fly?
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Old 12-21-2012, 11:25 AM
  #252
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Default RE: Andy Sheber Pitts s1s

Ace,
That's gonna fly for somebody.
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Old 12-21-2012, 01:01 PM
  #253
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Default RE: Andy Sheber Pitts s1s

I have been going over these wing plans real good. Just want tomake sure I have all the bases covered. There is one thing I will change. In the pic at the rear of the rib there is a rectangularcut out1/4 x 7/16. This is for a piece of hardwood to run from outer rib to outer rib. I do not have the tools to replicate this 28 times as accurately as I want it. So I am going to change this to a 3/8 dowel.
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Old 12-21-2012, 02:39 PM
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Default RE: Andy Sheber Pitts s1s

And here are the routered ribs. Next is the drill press for some lightening holes and the dowel hole.
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Old 12-21-2012, 02:58 PM
  #255
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Default RE: Andy Sheber Pitts s1s

Ace,

What is your way to make the stringer notches ?
Do you have a technique to make accurate repetetive cuts ?
Newbie builder here.

Thanks,
Kevin
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Old 12-21-2012, 03:22 PM
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Default RE: Andy Sheber Pitts s1s



I believe I do.
Pic1-After the router while still attached to the templet I cut the recess in the band saw. -This band saw cut is not exact just loosens up the inside.
Pic2-Now I line them up square, true, and held firmly.
Pic3-Then I make a sanding stick with a mark for depth.
Pic4- Put a good straight edge on the cut and sand with the stick.

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Old 12-21-2012, 03:39 PM
  #257
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Default RE: Andy Sheber Pitts s1s

Thanks ace.

Grasshopper very grateful

The more I see a the potential of a magnetic building board the more I want one.
Building a Sig KadetLt 40 on drywall now. The next plane will be built on a magnetic board.

Kevin
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Old 12-21-2012, 03:47 PM
  #258
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Default RE: Andy Sheber Pitts s1s

You are welcome. Nothing like a magnedic one. Wait till you see how much of this wing is assembled before a drop of glue hit's it.
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Old 12-21-2012, 04:54 PM
  #259
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Default RE: Andy Sheber Pitts s1s

Hey Robert
You seem to be moving at a fast pace. Love it.
You may have noticed with a couple of pictures I posted that I used flite skin fiberglass sheets instead of aluminum.
I am not completely happy with the way it turned out and have been thinking about removing it, smoothing the balsa skin again and using conventional glass and finishing resin.
I'm trying to talk myself out of it but it's not working.
I could then simulate the panels using high full primer.
Oh, what do I do?
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Old 12-21-2012, 05:05 PM
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Default RE: Andy Sheber Pitts s1s

Hey Wayne, Thank's.You know how it is as soon as I get thru the frameing it will slow way down.I have donepanelswith glass, aluminum, plastic, and even poster board.But leaving those big chunks of balsa out makes it a little different. I got some litho plate from a friend, it is super thin and flexible.So Iwill back it with 1/64ply, minus the overlap of course. I think, hopefully, this will be a bit lighter. But it does what I wanted to do and that is make them removeable.
Here's the ribs all done with the dowel stuck in the back side. Fine tuning will take place during instalation, if needed.
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Old 12-21-2012, 05:38 PM
  #261
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Default RE: Andy Sheber Pitts s1s

All the nose of the Waco is 1/64 ply, the gear covers are aluminum, and the gear fairings are fiberglass.
The nose of the Cub is poster board, and the gear covering is balsa covered in flite metal.
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Old 12-21-2012, 06:22 PM
  #262
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Default RE: Andy Sheber Pitts s1s

Fine! If ya'll insist. Here's some more building. The wings have been started. The bottom wing left half.
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Old 12-21-2012, 06:30 PM
  #263
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Default RE: Andy Sheber Pitts s1s

Here ya go! I'm no fan of thumb screws so I used regular.
Also if your gonna want any real down force there needs to be four magnets on the front instead of two.
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Old 12-21-2012, 07:00 PM
  #264
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Default RE: Andy Sheber Pitts s1s

Ace,

Was going to ask you about your fixtures for your magnets.
Do you have any other typesthan the ones you just showed ?

Also on a build such as the Pitts, about how many fixtures will you use ?
How many magnets, loose and attatched to fixtures will you use at one time ?

The magnets come in a box of 100.
Are 100 sufficient for a build like the Pitts ?

Thanks,

Kevin
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Old 12-21-2012, 07:14 PM
  #265
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Default RE: Andy Sheber Pitts s1s

How about posting a link to the magnets.
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Old 12-21-2012, 07:20 PM
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Default RE: Andy Sheber Pitts s1s

Here ya go.  http://www.magnetsource.com/Solution...-catches3.html
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Old 12-21-2012, 07:28 PM
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Default RE: Andy Sheber Pitts s1s

Kevin they will sell any number just call them. I got 100  loose magnets and 13 fixtures. For hold downs I usually use the magnets under the piece with a rubber band.  I don't really use the fixtures much other than to hold something square. I could use a few more, probably 100. If I try to form up an entire wing like I am doing on this pitts I will use most of them. So 250 should be sufficient. As a matter of fact I think I am going to go and order myself another 100. Thank's!
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Old 12-21-2012, 07:34 PM
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Default RE: Andy Sheber Pitts s1s

Ace,
Did the pic.s of the canopy get through?
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Old 12-21-2012, 07:36 PM
  #269
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Default RE: Andy Sheber Pitts s1s

I don't recall seeing it. Where did you send it to?
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Old 12-21-2012, 08:17 PM
  #270
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Default RE: Andy Sheber Pitts s1s

Ok! A little more. Thats about all I can do until romorrow. I need to cut some spars, leading and trailing edges.
Speaking of spars he says to make them out of balsa, hmmmmmm.
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Old 12-21-2012, 08:40 PM
  #271
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Default RE: Andy Sheber Pitts s1s

hmmmmmm. Indeed Robert. That would make me nervous !
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Old 12-21-2012, 08:50 PM
  #272
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Default RE: Andy Sheber Pitts s1s

Maybe the fly wires are functional?
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Old 12-21-2012, 09:14 PM
  #273
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Default RE: Andy Sheber Pitts s1s

My S2 had, key word HAD balsa spars. Changed to spruce for the main center spar with the rear secondary spar balsa..

And yes, I do believe the flying wires are functional.
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Old 12-21-2012, 10:51 PM
  #274
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Default RE: Andy Sheber Pitts s1s

Robert, thanks for the pictures of the jigs. I hear ya about using the four magnets for real holding power...
Derrick
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Old 12-22-2012, 08:00 AM
  #275
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Default RE: Andy Sheber Pitts s1s

For those that have not done this I thought I'd share how I cut my ribs. I make a copy of the rib in question on my copier. Then I glue the copy to some 1/4 ply with 3m spray adhesive. I then cut this rib on the band saw and do a fine edge finish with a sander. This is now a template. I put two screws thru the template that will hold several pieces of balsa. I then screw the balsa to the template, one towards the front and one toward the rear,and then route the balsa useing a laminate trim bit.. The bearing on the bit runs the ply while cutting the balsa. All 28 ribs come out identical.
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