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mccordia 73
Make a suit from shark skin!
It'll be stinky, but awesome!
It'll be stinky, but awesome!
JC
FlyLikeBrick
I'm an Athlete?
FlyLikeBrick
I'm an Athlete?
Heffro1 0
Actually, Yuri is on to something! Balancing a suit to peoples individual centers of gravity will increase performance. The way to do this, however, is to change the ratio of arm wing surface area to leg wing surface area. Unless a pilot is balanced on a fulcrum point it is very difficult to determine the exact C/G. Adding weight might give better results over an unbalanced suit, but tailoring suits to peoples individual C/G's will give better performance gains. I've designed a table just for this, but I'm still figuring out the formula to translate to surface area ratios.
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Tony Suits
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The111 0
Good idea, Jeff, I've always wondered if human CG variance is significant enough to actually warrant something like this. For example, if a guy is scrawny enough up top, and fat enough at the bottom, will a Vampire (for example) work significantly less efficiently for him than it would for a guy of more average build? I'm not sure we can know the answer to this, especially since individual flying skill plays such a large part in the big picture.
Well if you know where CG is, and where you intend CP (center of pressure) to be, it is simple geometry to balance the areas by wing profile. Also the body surface area is of importance.
Another thing to consider is that optimal surface area distribution for a given CG could vary based on intended performance. Suits intended for high performance often have CP (center of pressure) biased further to the rear. Suits intended for acrobatics, flocking, or student use often have the CP biased further forward. Do you have intended CG/CP relationships for each of your suit models?
I'm curious how much the human CG does vary for given height/weight ranges. What have you found so far with your table? I'd imagine that if this info is useful to somebody else, there is already some data out there in a human factors library somewhere listing 5/50/95 percentile distributions. (This is just an academic pursuit - if the variance is indeed significant, then you are on the right track measuring each person individually).
Could you post a picture of your table and how it works? What body position do you have people in on the table? As you know, CG is dependent on this. I will have to stop by the shop again next time I'm in town.
QuoteI'm still figuring out the formula to translate to surface area ratios.
Well if you know where CG is, and where you intend CP (center of pressure) to be, it is simple geometry to balance the areas by wing profile. Also the body surface area is of importance.
Another thing to consider is that optimal surface area distribution for a given CG could vary based on intended performance. Suits intended for high performance often have CP (center of pressure) biased further to the rear. Suits intended for acrobatics, flocking, or student use often have the CP biased further forward. Do you have intended CG/CP relationships for each of your suit models?
I'm curious how much the human CG does vary for given height/weight ranges. What have you found so far with your table? I'd imagine that if this info is useful to somebody else, there is already some data out there in a human factors library somewhere listing 5/50/95 percentile distributions. (This is just an academic pursuit - if the variance is indeed significant, then you are on the right track measuring each person individually).
Could you post a picture of your table and how it works? What body position do you have people in on the table? As you know, CG is dependent on this. I will have to stop by the shop again next time I'm in town.
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Also, will experiment with sewing a piece of thicker, heavier material on the bottom of the armwing, to make it very smooth. Or maybe I'll cover it with hair and experiment with different shaves.
L/D Vario, Smart Altimeter, Rockdrop Pro, Wingsuit FAP
iOS only: L/D Magic
Windows only: WS Studio
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