2 ms·
Hot air. They'll fall of their own accord once the fuel is gone. Might not even use fuel, just a big bag you inflate with hot air and it stays aloft long enou
by LorenPechtel 1y ago
Hot air. They'll fall of their own accord once the fuel is gone. Might not even use fuel, just a big bag you inflate with hot air and it stays aloft long enough.
- giorgioz 1y agoYou are right this would be the easier, doesn't require helium, solves the problem of taking them down.