Can a vacuum balloon be built with current material technologies? Answered

A balloon's bouyancy (lifting force) is a function of how much air it displaces. Today's balloons use hot air, hydrogen, helium and other lighter than air gases for lift. In 1670 Franceso de Lana, an italian monk, proposed the use of a vacuum. One major problem is how to make the structure light enough to support a vacuum without collapsing in on itself due to the outside pressure.

Question by sansoy 10 years ago  |  last reply 4 months ago

Wetsuit for 5 year old With fins/paddles

My nephew was born with severely clubbed feet, and lobster hands. After several surgeries he has ended up with with above the knee amputations, and tri-fingers with a very strong grasp. He receives intensive therapy and support, so he gets all the recreation he needs, plus occupational therapy. Well, he was recently introduced to a swimming pool and loves it. unfortunately, because of his amputations, he buoyancy is all screwed up. I would like to take a wet suit, and modify it to include a hard silicone leg prosthesis, and swim fins, and gloves that fit his fingers, with webbing, similar to what long distance endurance swimmers and navy seals use. I figure I can use off the shelf neoprene for the wet suit, and take very good measurements for the gloves. I have made patterns for outfits before, so I can layout the pieces, and have my wife or mother stitch them together. (they are great with sewing machines) For Bouyancy, I was toying with the idea of air bags made from cordura nylon and fillable from the outside with air attachment nozzles, and stitched inside the legs. They would be surrounded by hard plastic similar to the shape of his prosthetic legs he is getting used to. The torso of the wet suit would be stitched to the legs, so when his torso grew, I would cut along the seam, replace the torso as needed. Anything you guys think I am missing? I will start posting sketches and renderings as I get started on this project...

Topic by Lightcutter 12 years ago  |  last reply 12 years ago