Interesting. Was the propane intended for early in the flight only, or did you
have a way of keeping it liquid long term?
--
Ian M Garcia
________________________________
From: arocket-bounce@xxxxxxxxxxxxx <arocket-bounce@xxxxxxxxxxxxx> on behalf of
Doug Jones <rocketplumber@xxxxxxxxx>
Sent: Wednesday, April 19, 2023 1:40 PM
To: arocket@xxxxxxxxxxxxx <arocket@xxxxxxxxxxxxx>
Subject: [AR] Re: arocket Digest V11 #72
I worked with 90% HTP at DSI in 2017-18, demonstrating direct injection and
ignition with a spark-torch igniter, no catpacks. We bought the peroxide from
Peroxychem<https://active-oxygens.evonik.com/en> (now part of Evonik) with the
usual stannate stabilizer which would poison precious metal catalysts and
destroy silver ones. The flight engines were to use self-press propane for
fuel, with the nozzle extension cooled with the propane to ensure gaseous
injection, but I used methane in the dev engine for simpler handling.
I got some white spots on my hands occasionally and managed to get some on my
shirt and belly once, but quickly removed my shirt and rinsed it out while
swabbing my skin. It left me with a welt that lasted two days and didn't even
bleach my shirt. That served as a reminder to always wear my tyvek PPE, bad
engineer, no cookie.
With the stannate and keeping the HTP cold or even partially frozen, we were
confident we could support a two-year asteroid prospecting mission without the
HTP tank overpressurizing from decomposition.
On Wed, Apr 19, 2023 at 10:35 AM Keith Batt
<dmarc-noreply@xxxxxxxxxxxxx<mailto:dmarc-noreply@xxxxxxxxxxxxx>> wrote:
Who is working with peroxide at FAR these days?
--
Ian M Garcia