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#1
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Anyone know the weight difference?
Does anyone have the knowledge of what the weight difference is between
1 square ft. of 3 mil. plywood and 1 square ft. of 1/2" styro core composite? Or maybe someone could give me the weight of the 1 square ft. of 1/2" styro core composite? Lou |
#2
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Anyone know the weight difference?
On Wed, 04 Jan 2006 19:05:51 -0800, Richard Riley
wrote: On 4 Jan 2006 18:08:58 -0800, "Lou" wrote: oes anyone have the knowledge of what the weight difference is between :1 square ft. of 3 mil. plywood and 1 square ft. of 1/2" styro core :composite? :Or maybe someone could give me the weight of the 1 square ft. of 1/2" :styro core composite? : Lou Sorry, not enough information to be accurate but we can wing it :^) The core's going to be around 2 - 3 oz. Bidirectional fiberglass will be about 1 oz per ply plus 1/2 oz per ply for epoxy. 2 or 3 plies per side, so about 8 to 12 oz. YMMV You can make it a whole lot more compact if you use Vinyl Ester Resin though. I'm assuming you are talking about Styrofoam (TM) the blue construction foam. (has a styrene solvent in it) I was using some Styrofoam as spacers under one corner at the front end of the G-III. I "dripped" a little excess Vinyl Ester resin on the *stuff* and it just plain vanished. I guess there is a reason they don't use that stuff on wet lay-ups over Styrofoam cores. :-)) Roger Halstead (K8RI & ARRL life member) (N833R, S# CD-2 Worlds oldest Debonair) www.rogerhalstead.com |
#3
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Anyone know the weight difference?
"Lou" wrote in message
ups.com... Does anyone have the knowledge of what the weight difference is between 1 square ft. of 3 mil. plywood and 1 square ft. of 1/2" styro core composite? Or maybe someone could give me the weight of the 1 square ft. of 1/2" styro core composite? The weight difference between Okume or Mahogany plywood and that of Finnish Birch is significant as well. Rich S. |
#4
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Anyone know the weight difference?
Thats true, the plane I'm building calls for 3 mil Okume. I've come
across a website of a kr2 builder who decided to install the composite/foam instead of plywood. Unfortunatly he didn't weight anything before he made this change. Also he oversized everything on the plane and made quite a few modifications. His plane is overweight, but doesn't know if it's from the redesign, the oversize, or the material change. I like how it's coming out and it promises to be a very slick machine. Lou |
#5
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Anyone know the weight difference?
"Lou" wrote in message
ups.com... Thats true, the plane I'm building calls for 3 mil Okume. I've come across a website of a kr2 builder who decided to install the composite/foam instead of plywood. Unfortunatly he didn't weight anything before he made this change. Also he oversized everything on the plane and made quite a few modifications. His plane is overweight, but doesn't know if it's from the redesign, the oversize, or the material change. I like how it's coming out and it promises to be a very slick machine. Sure hope he registers it as a "Swiftfoam Special" or something other than a "Rand KR2". I can understand the toothgrinding that a designer suffers when someone substantially alters their design, yet keeps the name the same. 2 mm Finnish Birch is the equivalent in weight and strength to 3 mm Okume, IIRC. Rich S. |
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