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Guess we have to get rid of the props and just tether it to the pack like a balloon. Seriously though, I've often wondered if a weather balloon style lifter te
by solardev 3y ago
Guess we have to get rid of the props and just tether it to the pack like a balloon.
Seriously though, I've often wondered if a weather balloon style lifter tethered to a backpack could help it be lighter. Probably with a less flammable gas, and only in sparsely forested areas.
- dylan604 3y agoLess flammable would be Helium. It just so happens that the US is looking to sell the strategic helium reserve. So you just need to find a VC and you can get your backpacker's assistant idea off the ground. hehe as far as helium balloon, it would have to be a balloon of such enormous size to be of any benefit. To launch a couple pounds of payload to 90k feet required a balloon 8' in diameter on the ground.
- namibj 3y agoA kilogram of lift per cubic meter of helium. At sea level; if you let it expand it only goes bigger at altitude, without needing more helium.
- dylan604 3y agoGreat, so if I have a 25kg sack, a 1 meter sphere being trailed above is only going to make it 24kg. Like I originally stated, a few pounds required an 8' diameter balloon, so 2.5m balloon. That's friggin huge. FYI, at 90k' altitude, the balloon expanded to about 40' before reaching it's burst limit allowing for a return of the payload.
- temp365984365 3y agoLots of fun on windy days!