JimJarvis50
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Now that I see the size of those controlling fins, I'd be worried that if they are ever used when they are not the farthest aft fins, you might get control reversal. I think Armadillo Aerospace ran into that problem when they tried canards?
Basically, you may have to disable them until the stage behind them has separated.
In that vein, I'd imagine that they'd be best behind the second stage, so that they can right the stack before the second stage really gets it going.
I've been made aware of that problem. It would surprise me that the action could take place over the full length of the booster, but that may represent one more reason to disable the canards on the boost (and until after separation).
The current stack simulation (up to the point where the 2nd stage would light), suggests the velocity would fall below transonic at about 7 seconds into the flight. Might be good to let that happen too. I typically let the speed drop to around 750 ft/s before lighting the next motor. With guidance, perhaps 500 ft/s? Looks like this would be around 17 seconds. So, the profile could be a 7 second delay with 10 seconds of guided coast.
Jim