[AR] Re: Continuation of small hybrid motor design
- From: "Anthony Cesaroni" <anthony@xxxxxxxxxxx>
- To: <arocket@xxxxxxxxxxxxx>
- Date: Fri, 24 Jul 2020 12:21:35 -0400
These are from around 2000 and what we used for Hypertek and Hyperion
development. It was a self-contained module with pressure and temperature
PID controllers tied into a fill/vent scheme as well as tank weight. It
could keep pressure and temperature very close to set point.
Anthony J. Cesaroni
President/CEO
Cesaroni Technology/Cesaroni Aerospace
<http://www.cesaronitech.com/> http://www.cesaronitech.com/
(941) 360-3100 x1004 Sarasota
(905) 887-2370 x222 Toronto
From: arocket-bounce@xxxxxxxxxxxxx <arocket-bounce@xxxxxxxxxxxxx> On Behalf
Of mark.spiegl@xxxxxxxxx
Sent: Thursday, July 23, 2020 7:59 PM
To: arocket@xxxxxxxxxxxxx
Subject: [AR] Re: Continuation of small hybrid motor design
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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