The Rocketry Forum

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  1. Alan R

    LOC 4" Micro-Magg .ork file

    I needed to sim some motors, and I couldn't find the 4" Magg file anywhere. This is down-scaled from the widely-available 5.5" Mini Magg. Most components from the DB. Some measurements are from my own rocket. The rest are just a guess. Posted here cause someone else might want this someday.
  2. T

    Wrong Size fo M2020

    Hello, me and my team are preparing for a rocket competition. We were given 2 engine options for us to use in our rocket. First choice is M2150 and second choice is M2020. We have to draw rockets in for 2 options. No problem for M2150. But the dimensions of the M2020 are incorrectly given in...
  3. N

    Automating OpenRocket Simulations

    Hi all, I am trying to find a way to automate OpenRocket to run many simulations sequentially, changing some variables between iterations. I.e. Start with a rocket setup, then run 500 simulations increasing the outside temperature 0.05 degC each iteration. Some ideas were interfacing with...
  4. Miles Goodson

    Open rocket stability number?

    Hi all, I just got Open Rocket to simulate an F powered rocket that I'm building, and for some reason, I can't get the stability number past 0.6! I've tried everything. Any ideas on what to fix?
  5. turkkusuroket

    High speed for lounchrod out

    Hi friends. I have a problem. I need speed of 25 m/s for lounchrod but my design speed is 32 m/s. If I increase mass, altitude is falling. How can reduce the lounchrod speed? Thanks friends:(
  6. neil_w

    How to ask an OpenRocket support question (or any other support question for that matter)

    I don't know is anyone will read this but I can only hope. Please note this is not directed at anyone in particular; it's a result of seeing the same pattern repeat over and over here and elsewhere. When asking for support with OpenRocket, or any other program for that matter, you need to...
  7. turkkusuroket

    I need to help for error.

    Hi everyone. I build a rocket in Open Rocket. I have a problem when run simulation. I uptaded .org file and a picture that shown error message. What is the solution of the error? Thanks
  8. turkkusuroket

    High Speed Error

    When we do the simulation, it gives warning that the parachute is opened at high speed. However, the parachute opens at the apogee point where the velocity of the rocket is 0 m / s. When we examine the graph, we see that the velocity at the opening point of the parachute is -0.5 m / s. However...
  9. B

    Open Rocket 15.03 Ubuntu High Dpi Problem

    Hi everyone. I'm currently using Ubuntu 18.04 LTS on Huawei Matebook 13 QHD display and having "so tiny user interface" problem on Open Rocket 15.03. I've googled it and got nothing about how to fix it on Ubuntu. Do you have any suggestions? It's getting more annoying that I'm having the same...
  10. Co-leader of the LRP

    My Design Thread

    Hello! This is a thread where I'll be posting my designs for rockets, some which may eventually get built. Please feel free to make any sort of comments on my designs, i would appreciate the input. Also, this thread is inspired by neil_w's half-baked design thread
  11. J

    OpenRocket Linux AppImage -- Beta testers?

    Since the default Java implementation on Linux machines has moved on past Java 8, I've created an AppImage that should allow you to keep using the current release. I'd like to invite anyone who would like to Beta test it to give it a spin by downloading from...
  12. RocketEnthusiast101

    Need help regarding OpenRocketv15.03 execution

    hi. I'm facing an execution issue regarding open rocket software. I have the latest java software. However whenever I download open rocket-15.03 from their website. It downloads the file in WinRAR format in my download section. To try to fix this issue I tried using the notepad method (basically...
  13. Co-leader of the LRP

    Can you get info on how far a rocket will drift in OpenRocket?

    I know you can get that information in Rocksim, but can you get information on how far a rocket will drift in OpenRocket? If so, please let me know how to do it. Thanks!
  14. F

    TARC Questions

    Hi everyone, I'm leading a TARC team for the first time this year and I had a few questions. 1. We are using OpenRocket to model the rocket and everything looks fine but the flight time looks a little unrealistic. We are using two body tubes and the weight of the rocket is around 300g right...
  15. K

    Fix for Openrocket Android Motor Issue

    I posted this as a comment but I figured it'd be more useful as it's own thread: Hey guys, I've found a way to solve the issue. Though I have very little android development experience, the error seemed like all you had to do was replace any thrustcurve2008 query with a thrustcurve2015 one. So...
  16. jcramton

    Openrocket: Adjusting Motor Delay Timing

    I've seen this behavior in Openrocket for some time, and just verified it in the current 15. 03 version. I don't see the simulation or the plot taking into account the motor delay specified in Motors & Configuration. When selecting a motor in Motor Configs, you can manually change the delay...
  17. M

    Simulating parallel staging in a cluster (in OpenRocket).

    Silly thought, but one I had in the shower earlier today. Is there any way to simulate parallel staging in a cluster? Specifically, I'm thinking of a situation where you'd have several very large motors strapped together in a cluster, and then only certain sets (in symmetrical pairs) would be...
  18. opcon

    All Java applications menu font rendering problem (OpenRocket)

    I've had a problem for months that I was unable to figure out how to correct. Every Java application I ran resulted in the fonts for the menus rendering garbled, completely unreadable resulting in the applications be unusable for me, including OpenRocket. I tried everything I could think of. A...
  19. S

    OpenRocket turns 10

    Ten years ago today, I released the first version of OpenRocket (0.9.0). It's been a great ride since. Even though my personal rocket hobby has dwindled over the years, it's still exciting to follow progress in rocketry, both large and small. It's also fun to do experiments like simulating a...
  20. H

    Single stage reaches higher altitude than multistage

    The two files below are a couple of designs I made in Open Rocket. What I don't quite understand, is that the single stage version reaches a higher altitude than the two stage version. I understand that the two stage version has extra drag due to the additional set of fins to maintain stability...