Let’s be honest, no balloon the size of a small car can possibly carry any substantial intelligence package. A balloon’s carrying capacity must necessarily be less than the weight of a volume of air at the balloon’s operating altitude equal to the size of the balloon itself
A balloon the size of a small car, say 10 cubic meters, would therefore have a carrying capacity at 40k feet of 4 lbs minus the weight of balloon itself.
A balloon the size of a small car, say 10 cubic meters, would therefore have a carrying capacity at 40k feet of 4 lbs minus the weight of balloon itself.