So where the test conclusive or you need more data? Sounds like your
off to a good start. Mind if I ask what the goals are for this engine?
-------- Original Message --------
Subject: [AR] Re: Test this weekend...
From: Paul Breed <paul@xxxxxxxxxx>
Date: Sun, November 22, 2015 10:31 am
To: arocket@xxxxxxxxxxxxx
85% and the pack looked good.
Pure silver.
On Sun, Nov 22, 2015 at 9:22 AM, John Dom <johndom@xxxxxxxxx> wrote:
90% ? was the gauze pack black or half-destroyed after use? Silvered
stainless? Pack looked short compared to Mercury RCS.
JD
*From:* arocket-bounce@xxxxxxxxxxxxx [mailto:arocket-bounce@xxxxxxxxxxxxx]
*On Behalf Of *Paul Breed
*Sent:* zondag 22 november 2015 18:11
*To:* arocket@xxxxxxxxxxxxx
*Subject:* [AR] Test this weekend...
I fired the new 3D printed motor 3 times yesterday.
Most of the issues were related to test stand, the fuel valve seems to be
leaking.
Since the motor was vertical and fuel goes in below the cat pack not an
issue for hardstarts.
You can see a cartoon of the motor on my blog. (Unreasonable Rocket
http://unreasonablerocket.blogspot.com/2015/11/motor-design.html)
The first firing we did not get good decomposition of the peroxide in the
CAT pack. We skipped the smarium nitrate treatment step, and this may have
contributed. Muffed getting the data off the controller, no data.
For the second firing we set the feed pressure really low 20 psi.. and ran
peroxide through he cat pack to season it. At the end of that run we were
still not having good decompositon...no attempt to record data.
For the third run we had some test stand and battery issues that caused us
a delay...
When we were finally ready most everyone else was done for the day so no
one was filming and our one
gopro got set too close and flipped over.
The Third run looked really good almost clear exhaust and really good
sound. Motor is designed to run at 250psi max inlet, this run was about
175. (Reusing the test stand from a smaller motor and the valve is too
small, an easy fix) Got Chamber pressure of ~ 140 so the cooling and cat
pack drops were right where I would expect them at this flow. Got good
data from the run.
Hope to fix test stand issues and be back out there on Dec 5th.
