Estimating your teardrop weight

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Re: Estimating your teardrop weight

Postby Dalorin » Tue Apr 14, 2015 8:19 pm

Sharon,

That makes sense. I guess I meant just leaving the paint and epoxy out of the equation. The way that I see it you have the weight of paint and epoxy whether you skin in aluminum or not. If my memory serves I think the aluminum skin adds a couple hundred pounds.
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Re: Estimating your teardrop weight

Postby angib » Wed Apr 15, 2015 7:40 am

Let's say a 8x4 teardrop has 110 ft2 of skin area (3.5 sheets of plywood). Then 32 thou aluminium to cover that will weigh 50 lb - a little over 60 lb if 40 thou aluminium is used. Add maybe 10 lb for corner trim and a 10% margin for screws and sealants and you get a total of 66 lb in 32 thou aluminium and 80 lb in 40 thou aluminium.
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Re: Estimating your teardrop weight

Postby John61CT » Tue Oct 27, 2020 6:26 pm

How much puncture resistance does 40 thou aluminium buy you?
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Re: Estimating your teardrop weight

Postby Aussie leslie » Tue Oct 27, 2020 6:47 pm

John61CT wrote:How much puncture resistance does 40 thou aluminium buy you?



Good question how much protection does the aluminium sheet give you compared to thick canvas with three coats of paint ?
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Re: Estimating your teardrop weight

Postby John61CT » Wed Oct 28, 2020 12:18 am

or compared to FRP?

Which skinning sheet material resists puncturing the most relative to its added weight per sq ft?

PMF may not be strong, but trivial to patch up, if aesthetics are not a priority. . .
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Re: Estimating your teardrop weight

Postby saltydawg » Wed Oct 28, 2020 8:17 am

Well even thou this thread is about weight, we are talking about skins. The fiberglass skin I used is .3 lbs per sq ft, while that is cloth and gel coat its probably pretty close to what you get if you did a hand layup and filled the weave and painted it.

As for puncture resistance a premade fiberglass is probably the best, followed by aluminum skin, followed by a woody, followed by PMF and hand laid glass. But then we get in to each one a little further, fiberglass is pretty dent resistant and not too bad to repair. Aluminum would dent pretty easy, hard to punch a hole but dent easy, and not easy to fix and look decent. A woody I would think dents, but not super obvious, and puncture not super easy, but depending on how its built can be easy or hard to repair. PMF and hand laid glass should be pretty good at dent resistance its all whats under it denting, not super hard to punch a hole, and not too bad to repair depending on how it was finished in the first place.

I would also guess PMF weighs more than premade skins, and hand laid glass. Aluminum is probably pretty light too. If I had to guess PMF maybe the heaviest skin once complete.
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Re: Estimating your teardrop weight

Postby iconicflux » Tue Feb 09, 2021 2:04 pm

I want to say that Filon is .17 lbs/sqft
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Re: Estimating your teardrop weight

Postby KCStudly » Tue May 18, 2021 3:15 am

My testing showed that 8 or 10 oz canvas (I forget which at the moment) done PMF style weighs exactly the same as 2 layers of hand laid 6 oz glass cloth weave and epoxy. The epoxy remains relatively flexible, does not take damage easily at all, and... no... it definitely does not "shatter", as some people seem to be stuck on from the olden days of fragile polyester parts.
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Re: Estimating your teardrop weight

Postby Gold5one » Tue Mar 29, 2022 11:50 am

The formula for mine was, 15 x (8'x4') equals 480lbs, mine came in at 485 Lbs!- and the build has a box height of 42" instead of 48", I made it lower to decrease the frontal wind resistance.

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