- Mar 3, 2018
- Reaction score
- Central Colorado
Very late answer. Main point was that for early or perfectly timed ejection horizontal spin on booster should work if you are above 50 feet. On descent, all bets would be off.All that is true, of course, and super super basic. Did you have a point here about horizontal roll recovery?
Thanks Neil for adding this comment. I used it today to cut fin slots in the sustainer tube and it was easy peazy.When cutting fin slots, if you hold a piece of aluminum angle there and use it as a cutting guide, you can get beautiful straight cuts quickly and easily with very little effort (yeah it'll all be hidden by fillets).
Stability goes from 0.729 cal to 0.411 cal ..... and apogee is 1642 ftFor curiosity's sake, how about putting an E12 in the booster, with the extra inch hanging out the back? Just to see what happens. In OR, I mean; really no need to swing test it that way.
Stage separation occurs at about 137 feet, according to the exported data shown in the Excel screen grab.Yeah that shape looks really cool in flight in the swing test video. I didn’t realize you had a 24mm motor mount in there, that thing will really scoot. Might be pretty fast and high alt at staging with the D if you blink you might miss it.
Cool, thanks for the enlarged enlightenmentIt looks like the staging event is at about 130 ft., and the booster coasts up to about 250. Which it shouldn't do unless it's stable. And it seems to be coming in ballistic, i.e. stable, because the speed when it reaches zero altitude is literally off the chart. If I were you I'd worry about that.
View attachment 499704
Sustainer Swing TestCool -- Do you also spin test just the sustainer?
But, but, but... The unaccounted for ring tail will increase the boosters stability margin, so it will be not as negative as 0.78. Will it still be negative? It's your stuff, of course, but I'd feel better if you swing test the booster. With a spent motor (better for you) since it is spent by the time this matters.
- OR doesn't even know there is a ring fin.
- And an OR simulation of the booster itself, as a stand alone rocket, shows it to have a negative 0.78 cal stability.
Come on Joe.. what do you think I am, your trained Monkey.But, but, but... The unaccounted for ring tail will increase the boosters stability margin, so it will be not as negative as 0.78. Will it still be negative? It's your stuff, of course, but I'd feel better if you swing test the booster. With a spent motor (better for you) since it is spent by the time this matters.
I will now cease harping on it.