3 ms·
Strap one on your back and you can swim in the atmosphere like a diver in water. Although it would have to be over 66 cubic meters for an 80kg person in 20°C a
by arnarbi 14y ago
Strap one on your back and you can swim in the atmosphere like a diver in water.
Although it would have to be over 66 cubic meters for an 80kg person in 20°C air. If it is spherical, it would be c.a. 5 m in diameter.
- rossjudson 14y agoI would make mine in the shape of a giant hand. Then I'd take a picture and send it to Peter Molyneux.
- mortenjorck 14y agoThanks for the napkin calculation. How does that compare to the volume required for the amount of helium or hydrogen that would be required to achieve the same buoyancy?
- arnarbi 14y agoThis new material is 0.16 kg/m3, presumably if it's filled with vacuum.. Helium is 0.17 kg/m3 at 20°C and hydrogen is 0.09 kg/m3. At the same time, air is 1.2 kg/m3. So, the volume of each needed to lift 80kg (which would have to include the person and whatever structure to contain the material), is 80/(1.2 - density of material) m3. So: Helium: 78 m3, or sphere of diameter 5.3 m Graphene aerogel: 77 m3, or sphere of diameter 5.3 m Hydrogen: 72 m3, or sphere of diameter 5.1 m