That is generally the rule, although there are exceptions. I’ve developed
solids with zero exponent, but it’s a pretty safe bet this propellant has a
positive exponent.
Troy
From: arocket-bounce@xxxxxxxxxxxxx [mailto:arocket-bounce@xxxxxxxxxxxxx] On ;
Behalf Of Carl Tedesco
Sent: Tuesday, 11 April 2017 6:17 AM
To: arocket@xxxxxxxxxxxxx
Subject: [AR] Re: BURPG Hotfire of Heat Sink Chamber
I would guess they opened up the throat to lower the Vmax chamber pressure.
Remember burn rate is proportional to chamber pressure. We do this to light the
LR101, but we use an Aerotech G reload.
--- Carl
From: arocket-bounce@xxxxxxxxxxxxx <mailto:arocket-bounce@xxxxxxxxxxxxx>
[mailto:arocket-bounce@xxxxxxxxxxxxx ;<mailto:arocket-bounce@xxxxxxxxxxxxx> ] On
Behalf Of Robert Steinke
Sent: Monday, April 10, 2017 12:43 PM
To: arocket@xxxxxxxxxxxxx <mailto:arocket@xxxxxxxxxxxxx>
Subject: [AR] Re: BURPG Hotfire of Heat Sink Chamber
A Cesaroni Vmax only burns for about 0.4 seconds. Did you have any problems
getting the ignition timing working with such a short duration ignitor?
On Sun, Apr 9, 2017 at 1:36 PM, Douglas Lescarbeau <lscrbo@xxxxxx
<mailto:lscrbo@xxxxxx> > wrote:
Hey everyone,
Yesterday the BU Rocket Propulsion Group hot fired our heat sink engine, Iron
Lotus.
Full test:
https://youtu.be/TrEH56gX040
Slow-mo:
https://youtu.be/LftKgQkoDNs
~2,500lbf NOS/IPA heat sink chamber. Ignited with a Cesaroni Vmax slug. Full
data analysis to follow this week. Will be posted to burocket.org/updates
<http://burocket.org/updates> .
Best,
Doug Lescarbeau
Director-elect, Boston University Rocket Propulsion Group
