[AR] Re: Hybrid High Powered Rocket
- From: Ben Brockert <wikkit@xxxxxxxxx>
- To: arocket@xxxxxxxxxxxxx
- Date: Mon, 15 Mar 2021 12:50:08 +0200
On Sun, Mar 14, 2021 at 11:05 PM roxanna Mason
<rocketmaster.ken@xxxxxxxxx> wrote:
Some seals/o-rings need changing and all non ferrous metals are com[patabler
with LOx. Insulation is usually non necessary with test stand components only
extended storage is insulation necessary nother like LH2 which requires
insulation under all circumstances.
Titanium is not particularly compatible with LOX.
Insulation on cryo test stands is almost always worth the effort.
Stands rarely have as short of propellant paths as rockets so
insulating the lines helps to get the same quality of LOX to the
engine. It's also a quality of life thing, a stand that isn't
insulated will end up being perpetually wet from melted frost. If it's
a high throughput stand where you're testing every day for weeks, it's
very easy to build up a block of ice that can damage things like
instrumentation when the stand is emptied and starts to melt.
A good middle ground for amateur and lower duty cycle stands is to
insulate lines away from fittings; you get most of the benefit but can
still see leaks.
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