Using Concrete to build space ships...

> That is IF you find the perfect asteroid in the right orbit.

There aren't any asteroids in the PERFECT orbit. There are however
asteroids that are good candidates for orbital manoevering.

> When the orbit is not so perfect and you have to change it, this
could
> get really hard because of the inertia of such a huge mass
involved.
> When starting off a standstill youll have the time to get the
thing
> going in just the direction you wish.
>
> Frank

Look at my previous post for a response to the above.

TangoMan