"Ian Stirling" wrote in message
...
Andrew Chesters wrote:
Grunff wrote:
Ian Stirling wrote:

What sort of requirements are there on getting an account?


This varies a lot depending on who you talk to. There is supposed to be
a minimum annual spend, but I've never had this enforced. I buy 2-3
loads a year.

Thanks.
How much is a dewar?

New a 25l dewar is about ?300, but you can get second hand ones for
around ?100.


Hydrogen peroxide vacuum distillation to make HTP for rockets is
annoying,
and I was wondering if O2 might be more usable.


Liquid O2 is a lot less readily available, but you can still get it if
you try.

HTP H2O2 is even less available.
IIRC, 70-90% may be available if you're willing to buy a train load, but
otherwise you've pretty much got to distill it yourself.

(messing around in garage making rockets - eventual goal is a 4 stage
orbital
one with a kilo to orbit.)

Excellent!

Agree with the "Excellent"; but I somehow hope I live up-range from
Ian!!

Well, I can always get you on reentry

Actually, the stage weights are fairly modest, somewhere around 5Kg, 25Kg,
125Kg, 625Kg (fueled), so on launch it's well under a ton.
And the first stage is meant to come back on a parasail.

The second stage, which bits may reenter intact of, has a dry weight of
only 25Kg.

I was initially considering a launch from around John-o-groats (sp?) over
the pole.

That'll cost you in orbital velocity: you won't pick up anything from the
earth's rotation in that direction. I assume you've done the calculations
:-). I've been down to the ESA launch site at Kourou, French Guiana, and
it's there for a good reason, unobstructed launch path east over the
atlantic and only 5 degrees north. You'd better talk to the folks in the
Orkneys, they're due north of John O'Groats!

Andy.