Grunff wrote:
Markus Splenius wrote:
With the same frivolity as "Has anyone ever built a dalek", I wonder
if any of you have thought about making liquid nitrogen at home.

I always liked cryogenics as a kid :-)

Of course anything is possible - it's just a matter of cost! :-)


It's very, very difficult to do on any kind of DIY budget :-)

However, the good news is it's very easy to buy, and quite cheap too.
You'll need a reasonable sized dewar, maybe 20-25l, and an account with
BOC. I pay ~?40 per fillup.

What sort of requirements are there on getting an account?
How much is a dewar?

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

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