I'm currently in the process of creating a custom .eng file for use with OpenRocket/RockSim, and I've hit a bit of a snag that I'm hoping the community can help me with.
I used a website I found (http://www.aircommandrockets.com/sim/simulator.htm#collapseT) to generate a thrust curve graph for my water rocket. The plan was to take this graph and import it into ThrustCurve Tracer to get the .eng file that I need.
However, the graph that I've generated looks a bit off to me. The thrust appears to drop as expected initially, but then there's this strange spike that I wasn't anticipating. I've attached the graph here for reference.
Has anyone encountered a similar issue before? I'm not sure if this is a problem with the data I entered, an issue with the graph generation on the website, or if it's something I should actually expect in the thrust curve. Should I try this other website (which seems more simplistic, but might yield a more consistent result)? http://cjh.polyplex.org/rockets/simulation/
Any insights or advice on how to proceed would be greatly appreciated. I'm eager to get this right so I can proceed with my simulations and eventual launches.
Below I have added screenshots of the parameters used in the simulation, I don't know if it will help in the identification of the problem.
I used a website I found (http://www.aircommandrockets.com/sim/simulator.htm#collapseT) to generate a thrust curve graph for my water rocket. The plan was to take this graph and import it into ThrustCurve Tracer to get the .eng file that I need.
However, the graph that I've generated looks a bit off to me. The thrust appears to drop as expected initially, but then there's this strange spike that I wasn't anticipating. I've attached the graph here for reference.
Has anyone encountered a similar issue before? I'm not sure if this is a problem with the data I entered, an issue with the graph generation on the website, or if it's something I should actually expect in the thrust curve. Should I try this other website (which seems more simplistic, but might yield a more consistent result)? http://cjh.polyplex.org/rockets/simulation/
Any insights or advice on how to proceed would be greatly appreciated. I'm eager to get this right so I can proceed with my simulations and eventual launches.
Below I have added screenshots of the parameters used in the simulation, I don't know if it will help in the identification of the problem.
Attachments
Last edited:
