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] *On
Behalf Of *Robert Steinke
*Sent:* Monday, April 10, 2017 12:43 PM
*To:* 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> 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.
Best,
Doug Lescarbeau
*Director-elect, Boston University Rocket Propulsion Group*
