03-30-2009, 12:50 AM
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BARCLONE Rocketry
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Join Date: Mar 2005
Location: Mobile, Alabama
Posts: 5,357
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Quote:
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Originally Posted by rocketguy101
I just noticed a weird behavior w/ RS9 (latest version), I opened up an old sim, and selected "Rerun all simulations" to refresh the results. One of the engine combos looked way out of line, so I reran that particular sim, and the numbers came back in line (I was watching the deployment velocity). Out of curiousity, I kept clicking "Rerun all" and the values keep changing. 
I deleted all the existing sims and started over. Even with a single set of results, "re-running" will give different values!
Is RS using a random number generator to start the sims? |
Probably several. Check the flight conditions dialog, and you'll see things like temperature, wind, humidity, etc...
Each flight of a real model is different, no two being exactly alike. RockSim tries to simulate real-world conditions, so each simulation run has changes in those environmental parameters that mimic what you might find at your local field. In fact, you can go in and make some direct changes to this section that very closely match the typical pattern of your local field. I don't usually change anything here, being lazy, but the option is there to really fine-tune the simulation for your local patch of sky. |