Flywheels / NEO Retrieval

Ian, this is an excellent contribution to the discussion.

Sorry for my tardy reply, the day job is quite demanding currently.

I will reply at more length later, when I have found out the cost per
kilo of Xenon, and can compare it to the cost per kilo to LEO and the
cost per kilo of platinum group metlas.

Cheers,

CFR

>
> > Nobody has addressed the amount of propellant which would eb needed for
> > retrieving an asteroid.
> > It is very large.
>
> Not that large. Consider the rocket equation:
>
[snip[