Lentamental
Well-Known Member
- Joined
- Jul 27, 2009
- Messages
- 363
- Reaction score
- 3
I've been fooling around with a 3 stage rocket in Open Rocket, and everything was going great until I messed with the fins a bit, and started getting some big errors. In the quick simulation I am getting a bunch of N/As rather than estimates, and when I try to run the simmulation, I get this:
It seems to be somewhat related to fin size, or possibly velocity, because when I decrease the bottom stage fins enough to destabilize the rocket, it will give me an estimate based on unstable flight, and if I add about 30lb of nose weight, it will start giving me estimates again.
Any ideas?
View attachment Space Rocket 3 Stage decreasing.ork
Code:
net.sf.openrocket.simulation.exception.SimulationCalculationException: Simulation values exceeded limits
net.sf.openrocket.simulation.exception.SimulationCalculationException: Simulation values exceeded limits
at net.sf.openrocket.simulation.RK4SimulationStepper.step(RK4SimulationStepper.java:264)
at net.sf.openrocket.simulation.BasicEventSimulationEngine.simulate(BasicEventSimulationEngine.java:86)
at net.sf.openrocket.document.Simulation.simulate(Simulation.java:302)
at net.sf.openrocket.gui.main.SimulationWorker.doInBackground(SimulationWorker.java:55)
at net.sf.openrocket.gui.main.SimulationWorker.doInBackground(SimulationWorker.java:24)
at javax.swing.SwingWorker$1.call(Unknown Source)
at java.util.concurrent.FutureTask$Sync.innerRun(Unknown Source)
at java.util.concurrent.FutureTask.run(Unknown Source)
at javax.swing.SwingWorker.run(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
It seems to be somewhat related to fin size, or possibly velocity, because when I decrease the bottom stage fins enough to destabilize the rocket, it will give me an estimate based on unstable flight, and if I add about 30lb of nose weight, it will start giving me estimates again.
Any ideas?
View attachment Space Rocket 3 Stage decreasing.ork