03-19-2010, 10:45 PM
|
|
Incurable SEMROC Fan
|
|
Join Date: Mar 2005
Location: Twin Falls, Idaho, USA
Posts: 2,318
|
|
Mas bueno! ("Better!")
Quote:
Originally Posted by RandyT0001
I added one ounce of mass located in the ST-730 body tube just aft of the bulkhead and it dropped the rocket's optimal delay to 3.9 sec and it's velocity at deployment to about 11 ft/sec.
|
Quote:
Originally Posted by CPMcGraw
Notice that the A8-3 and C6-5 values are close to perfect. [SNIP] Increase the drag slightly, and the model will begin to arc over sooner. What you want to achieve is to have the A and C engines deploy just after apogee, and the two B engines just before.
Scale up the fins a couple of percent and try running the simulation again. YMMV...
|
Randy and Craig (and Mark ),
Thanks for your input! I basically ended up adding a bunch of nose weight by swapping out the SE-10 screw eye with two SE-14's (in appropriate places) and a couple of WL-7 washers. That leveled out the deployment times, but obviously cut back on the altitudes.
I'm thinking if I do the same thing to my Prometheus, I might have to eliminate my tag line about "High Performance."
Craig, I was using Carl's standard "Recruiter" fins, so I decided that (British accent) "my talents lie in other directions." (A Bit of Fry and Laurie)
Herewith, "Retrograde" version 2.
Thanks so much, guys! I appreciate the help!
.
__________________
Jay Goemmer
"Centuri Guy"/"Tau Zero"
YORF Member 28
Semroc SAM #0029
NAR 86131
"I think about organizing things all the time. Never seems to happen. I find something that piques my interest and I'm off on a quest. Or a Centuri. "
--Bill Eichelberger, 02/22/2022
“Centuri fret buzz in an updated form.”
Bill “Wallyum” Eichelberger re: Estes Flutter-By
03 Sept 2014
|