Metal SS Wing

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Metal SS Wing

Postby kenryan » Mon Sep 29, 2014 12:38 pm

Has anyone considered not covering the SS wing and just making it all metal? Looks like it would add roughly 15 pounds to the overall weight. Are there considerations other than the weight penalty?
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Re: Metal SS Wing

Postby danerazz » Mon Sep 29, 2014 1:59 pm

Early ercoups are commonly "metalized" as you are suggesting. I don't know enough about the SS but don't see why it couldn't be done, and cannot think of any reasons other than weight not to do it.
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Re: Metal SS Wing

Postby R Rinker » Mon Sep 29, 2014 6:43 pm

really tempting idea...Some things I've "heard" is that, at the spacing of the ribs it will be 'wavy' and look bad. I guess you could go thicker and add stiffeners? If you have quick build wings you'd have to drill out a bunch of rivets to slide it under the leading edge, which is the main reason I quit thinking about it. So, adds 15 pounds at what gauge metal??
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Re: Metal SS Wing

Postby kenryan » Tue Sep 30, 2014 2:37 pm

85.75 square feet
X .228 (.016) = 19.5 lbs
X .285 (.020) = 24.4 lbs

It looks like the ribs are already set up for additional stringers, one top, one bottom. I can't imagine any problem with wavy-ness if stringers are added top and bottom. Using 1/2 X .035 round stringers would add another 2.6 pounds total. Using Oratex for figuring (because the weight is known) subtract about 6 pounds for fabric but then add back paint.

Bottom line: .016 with additional stringers, painted, probably about 20 pounds heavier than same two wings covered with Oratex.
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Re: Metal SS Wing

Postby jak » Tue Sep 30, 2014 6:58 pm

very first wings we buit were to have all metal sheeting the cad plans were drawn up for this as we built the wings we became very wary of the weight adding up. the sheet metal in the middle was omitted in the name of weight saving. Just to heavy. Jak
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Re: Metal SS Wing

Postby kenryan » Thu Oct 02, 2014 11:53 am

Note, my figuring has been with regard to the main wing structure only, not including flaps or ailerons. I would now say that if you don't paint the wings, the result would be the addition of 15 pounds. That's using Oratex. If you are covering with some other, heavier fabric system, the difference would be less, depending upon the skill, or lack of skill of the person applying the coatings.

For those who like the idea of a metal wing, I think covering the main wing with .016 and leaving flaps and ailerons fabric makes a lot of sense. Incidentally, the Helio has metal wing and fabric ailerons (but metal flaps).
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Re: Metal SS Wing

Postby danerazz » Fri Oct 03, 2014 10:37 pm

kenryan wrote:Incidentally, the Helio has metal wing and fabric ailerons (but metal flaps).


So is the DC-3, B-17, and a whole bunch of others!
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Re: Metal SS Wing

Postby Heliojoe » Wed Oct 08, 2014 7:39 pm

New to this forum...but working on our 40th airplane build, the Just Aircraft "Super STOL".

Yes....the Helio Courier did have fabric ailerons with metal wing skins and flaps. I rebuilt 4 Helios and owned two myself...the premier STOL airplane bar none.

Yes....we are metalizing the wings on this Super STOL at the present time. It's a no brainer considering only about 20 - 23 inches remains to be covered. Those concerned about the weight should re-calculate the weight of fabric/tapes/several coats of Poly-Brush, 3 more coats of silver, possibly a coat of epoxy primer and finally 2-3 coats of 2 part urethane. The difference is negligible and I really don't think, the way this airplane is built, that it could care less. There are many other areas that weight can be saved........Heliojoe.
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Re: Metal SS Wing

Postby jak » Fri Oct 10, 2014 7:56 pm

heliojoe if you want to all metal the wing, please call troy he has some info you will want to know. Jak
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Re: Metal SS Wing

Postby Heliojoe » Sat Oct 11, 2014 3:50 pm

jak wrote:heliojoe if you want to all metal the wing, please call troy he has some info you will want to know. Jak


Hi Jak.........will call Troy on Monday...thanks.
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Re: Metal SS Wing

Postby kenryan » Mon Jun 29, 2015 11:17 pm

Well, if anyone is wondering what a metal SS wing looks like, here you are.

finished-wing.jpg


finished-wing2.jpg
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