I have photos of a MD M840 (longburn, 75mm 6G motor) where the thrust is
visibly offset.
Man that was a squirmy flight...
Bryce Chanes
Full-time Student/Musician/Eagle Scout/Rocket Scientist
On Jun 17, 2015, at 5:54 PM, Cliff Sojourner <cls@xxxxxxxxxxxxx> wrote:
And grain configuration. I am certain that moonburners and C slots have
offset thrust, there's only so much the convergent section of the nozzle can
do.
On June 17, 2015 4:44:03 PM PDT, R Dierking <applerocketry@xxxxxxxxxxx>
wrote:
So, what do you think? Malformed nozzles, chamber pressure too high,
exhaust gases thrust vector rocket...
Sent from my iPhone
On Jun 17, 2015, at 4:24 PM, "Kurt Gugisberg" <kurtgug@xxxxxxxxx> wrote:
From the video, I could see that my Punisher also veered off after it left
the pad. I had to leave my casing with David because it had a heat bulge
in the end near the forward seal. So it was probably close to catoing too.
Looks like we have a cast of characters that might lead to to behavior we
saw: misaligned thrust vectoring, rail button placement, low level of
stability with high thrust motor. The only thing it might not be is rail
whip.
Kurt
On Wed, Jun 17, 2015 at 1:02 PM, R Dierkin g <applerocketry@xxxxxxxxxxx>
wrote:
I’m sure we can come up with things to investigate and even reduce this
misalignment problem.
Who’s interested in a Punisher 2 mass launch? I think we should use the
same K1440 engine and leave it up to each flyer if they are going to
modify the rail buttons, pad, whatever else. We have lots of time to
collect details on each project.
Chris, would it be possible to post some details of the AC stand used to
test for misalignments?
Do you think that creating a way to hold the rocket on the pad until max
thrust is achieved would help?
I’m wondering why David Reese has not joined this discussion because
wouldn’t he be one of the best people to advise on something like this?
Again, I think building a large launch pad/test stand for ROC launches
would be cool and we probably wouldn’t need the contribution of many
people to do it. We could use the pad at Black Rock for XPRS or BALLS.
Again, I’m offering to buy the trailer for the project.
Richard Dierking
--
Sent from my Android device with K-9 Mail. Please excuse my brevity.
