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Re: starship-design: How to build a station.
> In a message dated 4/20/00 2:45:48 AM, email@example.com writes:
> >With a 40:1 mass/payload ratio 5 tons is a 200 ton space/craft,
> >a bit large for a first time design. How about 2.5 tons... 100 ton
> Why do you assume a 40 to 1 ratio?
There is about a 20:1 mass ratio from the rocket equation
for a ISP of 350. ( lox/ kerosene or lox/ch4 ). If you assume
the mass of the craft empty is the same of the payload, that
becomes a 40:1 ratio.
> Solar in general is expensive. The panels however are simpler and more
They have been claiming cheap solar panels, as long as the have
been claiming cheap access into space.
> A LOX/Kero rocket based SSTO would use 14:1 fuel/craft ratio. The air
> breather could cut that to 7-1 maybe less. Given Kerosine is far more dence,
> it needs a far smaller and lighter tank.
I just think in the near future +25 years the price of oil/gas will
skyrocket and CH4 will be cheaper than synthetic Kerosene.
"We do not inherit our time on this planet from our parents...
We borrow it from our children."
The Lagging edge of technology: