Help with RockSim HPR Staging

Rob Adlard · Nov 5, 2019

Hi, I've read several threads on this, but still can't get my stages to separate on RockSim...what on earth am I doing wrong...do I need to add a separation charge with plugged motors? If so how? Thanks for any advice.

Eric · Nov 5, 2019

I think I was able to get it to work by setting the booster motor delay, for the time that I wanted my actual Coast phase to last. But then I assume that it is simulating dragging the booster all the way until sustainer ignition

Rob Adlard · Nov 5, 2019

Can't seem to affect it with any changes to that...it just won't separate...

Titan II · Nov 5, 2019

Try putting this in....it works fine. Then adjust for your own parameters.

Ejection delay sec. Ignition delay sec.
(Sustainer) None 2.00
(Booster) 0 0.00

Rob Adlard · Nov 5, 2019

Thanks for that, but still no joy....

Rob Adlard · Nov 5, 2019

Is it because it needs an ejection charge added somewhow? I don't think so, but I'm grasping at straws...

Eric · Nov 5, 2019

Correct. The ejection charge is assumed to fire after the motor delay. Adding a motor delay gives you an ejection charge which ignites your sustainer.

Titan II · Nov 5, 2019

Sustainer "Ignition delay sec." is the time between booster burnout and sustainer ignition. In my example above, the sustainer fires 2.0 seconds after booster burnout. Can you post your setup?

dhbarr · Nov 5, 2019

Post the sim.

JimJarvis50 · Nov 5, 2019

I don't have problems doing this. When I pick the booster motor, I type in the "ejection delay", which sets the stage separation time after burnout. Then, when I pick the sustainer motor, I set the "ignition delay", which is on top of the ejection delay. I never modify the motor file itself.

Jim

Help with RockSim HPR Staging

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