Optimum Mass in RockSim 8 - Northern Colorado Rocketry

This topic has 12 replies, 8 voices, and was last updated 14 years, 12 months ago by SCOTT EVANS.

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January 18, 2011 at 10:17 pm #41183
Bruce R. Schaefer
Someone in the club asked me how to find the optimum mass for a rocket in Rocksim. I can’t, for the ever loving life of me, find out where it is. I mean, you can select different mass overrides and run the sim and find out which goes higher. But I thought there it was just a click away. Hah? ❓
January 18, 2011 at 10:24 pm #53759
Adrian
Participant
There’s a feature in the simulation area where you can run the mass optimizer. The problem is that it is horrible at finding the optimal mass. I have found it’s better just to adjust your nose weight and re-run it yourself.
January 18, 2011 at 10:57 pm #53760
Bruce R. Schaefer
Thanks, Adrian. I just changed mass and kept re-running it, too.
January 18, 2011 at 11:35 pm #53761
Bret Packard
Participant
So the graph that it plots for you isn’t accurate? I use this feature all the tim but I haven’t built anything yet that I’ve flown enough to really test it’s accuracy.
January 19, 2011 at 3:36 am #53762
greywolves
Hey guys,

I have never used the Rocksim, I use Openrocket, it sounds like they are simiair. In Open Rocket, thats how i have been doing it also, just keep tweeking the nose weight. Open Rocket post altitude and speed, on the build page, so every adjustment you make you see how it effects the rocket, right then, no simulation run. Rocket sim do this also?

Sure do build faster on the computer screen.
January 19, 2011 at 3:14 pm #53763
Adrian
Participant
So the graph that it plots for you isn’t accurate? I use this feature all the tim but I haven’t built anything yet that I’ve flown enough to really test it’s accuracy.

There have been many times where I set the mass based on the graph, and then when I re-run the sim I get a lower altitude than what I started with.
January 19, 2011 at 8:45 pm #53764
Warren B. Musselman
Moderator
At least with Rocksim 7.x I’ve seen that the manual optimization works far better than the automatic. Rocksim 8 (paid for) doesn’t work on any of my systems at all.
January 19, 2011 at 10:43 pm #53765
Bruce R. Schaefer
At least with Rocksim 7.x I’ve seen that the manual optimization works far better than the automatic. Rocksim 8 (paid for) doesn’t work on any of my systems at all.

Can we go back in time? 😉
January 19, 2011 at 11:59 pm #53766
Warren B. Musselman
Moderator
Wilke still uses the free version of Rocksim 4.0 I think.
January 20, 2011 at 3:01 am #53767
Adrian
Participant
After I rebuilt my computers and lost RS 8 in the process, and after pointing out bugs that didn’t get fixed in RS 9, I gave up and I only use Open Rocket and RASAero now.
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