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starship-design: stale mail
Your mail to: "Michael K. Heney" <mheney@mach-25.com>
with subject: Re: Virtual Beanstalk -- Numbers, numbers, who's got the numbers?
sent on: Sun, 08 Aug 1999 21:42:13 -0600 is being returned to you.
It sat unread in the mailbox beyond NetZero's 6 month limit.
Undelivered Ideas
> > Sorry for saying you were negative. I know you were just trying to
> > put a practical spin on my $10 orbital goal and that you want cheap
> > access to space as much as I do.
Here are some round about numbers for my view on the lowest cost.
http://www.rotaryrocket.com/tec/rotonv.html Rotory rocket.
Mass fully loaded 180,000 kg
Pay load 3,200 kg
cost per playload $2,200 kg
fuel/payload 56:1
http://solar.rtd.utk.edu/%7Emwade/props/loxosene.htm
lox/Kerosene ratio 2.5
40 kg lox
16 kg fuel for each kq of payload.
cost 1980 lox kg $ .08
fuel kg $ .20
assuming 3 x increase for 2010 then ( my guess )
lox .24
fuel .60
lox $9.60
fuel $9.60
rounding up $19.20 per kg of payload fuel costs.
tricky part assume a running cost 30% of the fuel
Mininum cost $ 25 per kg $12.5 per lbm
RLV Current cost $2,200 per kg
Mature cost ( guess ) $ 50 per kg $25.00 per lbm
So here are my numbers. I can see why NASA and the military have never developed
RLV's look
how much you can rip off the tax payer.