Andrew,
Unfortunately I can't make it to LDRS. Just too much going on at work
right now, plus my son would not be able to attend since school is still
in session. His finals end on June 7 so ROCstock is our return to rocketry.
If you have time on Saturday at ROCstock I would certainly like to show
you our finished (?) 2-stage construction early in the day and get any
last-minute feedback. I was planning to bring 2 versions of the 3D
coupler and select the winner at the site, a real game-day decision.
Also I need to take my L2 exam -- last time I tried was that really
windy launch day in February where we literally got blown away by
10:30. Some of my paperwork escaped and took off across the playa,
never to be seen again!
Terry
On 5/14/2018 2:19 PM, Andrew Wimmer wrote:
Terry,
Are you going to be at LDRS? Would love to chat about 2 stagers there if you'll be there.
-Andrew
On Mon, May 14, 2018 at 2:11 PM, David Erbas-White <derbas@xxxxxxxxxxxxxxxx <mailto:derbas@xxxxxxxxxxxxxxxx>> wrote:
On 5/14/2018 1:44 PM, Mike Riss (Redacted sender rockt_dude for
DMARC) wrote:
"What I have done is use a single igniter, taped to a thin dowel
(to keep it at the top of the motor)."
The igniter not being in the right place to light the motor
probably factors in a lot. Unlike in a motor that's lit on the
ground, the igniter in the 2nd stage is subjected to the g's of
the 1st stage motor burn.
Mike
Ya know, it wasn't until my second reading of that sentence that
the significance of it really hit me. That's actually a really
important insight -- I'll keep that in mind for future staged
high-power flights!
David Erbas-White
