[AR] Re: Continuation of small hybrid motor design
- From: <mark.spiegl@xxxxxxxxx>
- To: <arocket@xxxxxxxxxxxxx>
- Date: Thu, 23 Jul 2020 18:58:55 -0500
Troy Prideaux Wrote:
I’m assuming then we’re talking about a non-vented tank here?
Not exactly.. Im still stubbornly pursing fixed temperature (ie low) Nitrous..
The tank vents until a predetermined pressure and temperature are reached, then
the vent closes. Since Nitrous rockets are long and thin, the temperature
variations in a 5,6,7,8 foot tank are huge.
Common sense says that high pressure, oxygen safe, dynamic seals are really
hard to make. However, the seal is not connected to a pump. It would connect to
a stirrer.
Is this a reasonable approach?
A small thin axle with paddles, a corkscrew, whatever..
The axle traverses the entire length of the tank, and out the top bulkhead.
Seal the top bulkhead with a standard oring, EPDM Fluorosilicon whatever
Connect the axle to a wimpy battery powered motor.
Run the motor at 10s of rpm.(*)
The dynamic seal wouldn't need to last long.
Another idea is building a static heat pipe. Heat pipes work well in
electronics, but I seriously doubt they scale.
--MCS
(*) Of course I already have a small motor to power Troy's pyroless ejection
system. :-D
Da'yam that one of my favorite ideas from this list!
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