helium

[joshua brady]

what other property of helium makes it good for filling airships

[ursula62]

It is light, inert and uninflammable - well at most temperatures where you'd use it in an airship.

[brachiopod]

What was the helium property you had in mind?

[Gef]

Just to be SC (Scientifically Correct). It is less dense than air and non-flammable :-)

[brachiopod]

Boo - hiss, I was about to ask joshua to decide whether he thought helium was flammable or inflammable (when mixed with air / oxygen of couse).

[Piper-AK]

On long flights to relieve boredom you can go and sit in the balloon and do silly voices??