An average blimp is about 1.5 meters long, and somewhat egg-shaped.
Hydrogen lift will support about 1 kg per cubic meter at STP. Are blimps from a planet with an espeically dense or cold atmopshere, or are you seriously going for a 5 lb natural sapient?
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Hydrogen lift will support about 1 kg per cubic meter at STP. Are blimps from a planet with an espeically dense or cold atmopshere, or are you seriously going for a 5 lb natural sapient?