OPSA Merlin 1 Balloon Rocket
News on this soon
But a Cambridge student science team have already achieved this.
This is our project to launch a helium-walled rocket to attain an altitude record.
Find out more
The creator of Amazon.com has also launched a similar reusable spacecraft. It appears to be using conventional fuel but the shape of the craft is interesting.
More information can be found here, http://news.bbc.co.uk/1/hi/technology/6230245.stm
There is a link on this page to a video of the Amazon launch.
Merlin has already suggested a solution to this on our forum and it is something we are very interested pursuing.