Help me with the physics

> Mmmm another good one... :)
>
> Something I always been thinking is to use balloons
> to take vectors up to
> the very limit of the atmosphere and then ignite
> from there... I wonder why
> is not done, surely would save a lot of fuel?
> I guess the problem is to get the balloon where you
> want it at the right
> time...?
>
there is an x-prize contestant already using this
approach: www.jpaerospace.com

They even have put hundreds, if not thousands of
payloads into the upper edges of the atmosphere:
www.pongsat.org. Probably one of the best public
relations efforts I have seen coming from a private
company to get people excited about space!

Ryan