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GPW wrote:Plywood = 57#/ cu. ft.
Foam 2#/cu.ft. ....
loaderman wrote:I always see people comparing Foam weight to plywood.
Really need to compare the overall system.
Plywood, spars, paint, etc.
Foam, interior finish (bedsheets can be used), canvass, and paint.
I do remember one thread where someone mentioned the weight of the paint on a boeing i believe and it was a lot!!!!
Having said that, yes I do believe a faom system would be lighter. But as others have said trailer weight is a huge deal, as well as air flow etc.
wagondude wrote:loaderman wrote:I always see people comparing Foam weight to plywood.
Really need to compare the overall system.
Plywood, spars, paint, etc.
Foam, interior finish (bedsheets can be used), canvass, and paint.
I do remember one thread where someone mentioned the weight of the paint on a boeing i believe and it was a lot!!!!
Having said that, yes I do believe a faom system would be lighter. But as others have said trailer weight is a huge deal, as well as air flow etc.
Very true. Also remember the color of the paint effects the weight. For instance, FedEx used to have planes that were white on the bottom and purple on the top half for the full length. They changed to the current theme where only the tail is purple and saved a considerable amount of weight (I don't remember the exact figure). It seems that the purple had a large amount of lead in it. The repaint was supposed to pay for itself in fuel savings within just a few years.
S. Heisley wrote::thinking: Okay, so, at 19 mpg, my car isn't the most fuel efficient; but, evidently, my wood trailer is. Towing 1100 lbs drops my mpg to 15 mpg, just 4mpg less. So, weight on that point may not matter. Maybe it's mostly aerodynamics.
But, remember, if you can keep your weight down on that trailer, it could be easier when you have to brake.
Lonewolf42301 wrote:S. Heisley wrote::thinking: Okay, so, at 19 mpg, my car isn't the most fuel efficient; but, evidently, my wood trailer is. Towing 1100 lbs drops my mpg to 15 mpg, just 4mpg less. So, weight on that point may not matter. Maybe it's mostly aerodynamics.
But, remember, if you can keep your weight down on that trailer, it could be easier when you have to brake.
Very true... aero is the major concern at hiway speed... the smaller the parachute you pull, the better off you will be.... Now, stopping that brick is another matter.... getting up to speed and back down is where weight plays an issue.
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