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  1. 1

    HPR Sim Questions

    Hi all! Back in December 2023 I got my L1 on a Binder Design Excel 54 mm version. I meticulously designed the rocket on Open Rocket yet still am having some issues. I am trying to match my sim down to the actual launch I had back in December and make it so that the rocket’s delay is actually...
  2. I

    Does it matter where the CoP is on the rocket as long as it's below the CoG?

    So I know that the CoP has to be below or behind the CoG for the rocket to be aerodynamically stable but I am wondering if it matters that the CoP is significantly further up the rocket that the wings as seen in the image the CoP is close to the center, does this affect the performance or not?
  3. xXHeliMechXx

    2.6” 38mm Crossfire ISX Upscale

    I started a scratch build Crossfire ISX. I scaled it using open rocket to a 2.6” airframe tube and I am going to be using a 38mm motor tube. I spent yesterday drawing up vectors and cutting out my centering rings and fins using 1/4” birch. I found a motor retainer on thingverse im going to try...
  4. lemon

    packing size of a parachute in real life

    How can i determine packing size of a parachute in real life from open rocket? i got packing diameter - 3.8inch and packing length - 15.7inch in Open Rocket for the 12ft Pro Experimental Drogue Parachute by Rocketman. This will be used in a rocket whose apogee is around 3000 feet (1 km to be...
  5. R

    3D Printing Printing Rocket Fins Open Rocket how ?

    Hey All Been designing and testing 3D printed Fins as part of STEM project. and I have a couple of questions around simulating results here. The fin gets printed on a 15 degree support to make sure that the layer lines is not in the same direction as airflow and the fin experiences more of a...
  6. lakeroadster

    Open Rocket Software Verification Models

    Centuri Technical Information Report #33 is a report, written by James Barrowman, that defines the long hand calculations for determining the center of pressure of a model rocket. In Open Rocket I replicated the (3) rocket examples shown in the report. These can be used as verification for the...
  7. Frosty_Burrito

    RasAero II Apogee Discrepancy with OpenRocket

    I wanted to verify our apogee (and the rest of the flight) predictions between OpenRocket and RaeAseo II. After importing the rocket into RasAero II and making sure that everything matched the OpenRocket, I ran the simulation and found that the apogee varied between OpenRocket and RasAero II by...
  8. stuart.mitchell

    Apache Log4J Exploit

    Hi there! A couple of days ago a very serious exploit was identified in the Apache Log4J Java logging library. As a few of our team use Open Rocket, we were wondering if Open Rocket uses this library, and if so, whether or not anything is being done to mitigate against it (patches, etc)...
  9. K

    open rocket , recovery device deployment error

    i am new to open rocket and tried making a 2 staged rocket. i am continuously getting the recovery device deployment at high speed error. i will add the file.
  10. noob

    OpenRocket Payload Separation

    Hello, I was wondering if it is possible to simulate payload separation with Open Rocket. I was able to simulate deploying payload within a nosecone using stage separation. Now, I need to simulate a payload being deployed from a different section of the Rocket. Is it possible to simulate this...
  11. noob

    Payload Deployment OR

    Hello, I was wondering if it is possible to simulate payload separation with Open Rocket. I was able to simulate deploying payload within a nosecone. Now, I want to simulate a payload being deployed from a different section of the Rocket. I hope this has been discussed before if so can you...
  12. T

    Freefall in openrocket

    Hi, is there any way to simulate free fall / drop test from a certain altitude to landing point? Thanks.
  13. T

    Air launch in OpenRocket?

    Hi, basically, how do you simulate air launches in OpenRocket? Thanks.
  14. F

    OpenRocket Simulation Different from "live" simulation

    Hi all, after doing a simulation in OpenRocket 15.03 I noticed my simulation results were different than the ones in the bottom left corner. Whats the reason for this? P.S. Rocket looks weird due to TVC system P.P.S Any recommendations as how to improve the apogee and stability of the rocket...
  15. turkkusuroket

    Open Rocket Payload Data Export

    I need to payload flight simulations from open rocket.I want to plot export of payload.(altitude to time graph)
  16. Miles Goodson

    Altitude to expect on a Estes F engine?

    Hi all, back again with another(probably dumb) question. I've been designing my next rocket in OpenRocket, which flies on an Estes F15-8. The apoapsis in the simulation is 454 meters, and I was wondering if this was an average apoapsis for this kind of motor, or if I just did something wrong(I...
  17. Chilly

    4" Mercury Redstone File?

    Hi all, Been away from the forums for a long time (more on that later), and I'm back with a question... I'm finishing up a Boyce Aerospace Mercury Redstone builder's kit (4" diameter) and need a Rocksim or Open Rocket file. Does anybody have one? Thanks!
  18. 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?
  19. Scott Chase

    Help With Fins In OpenRocket

    When I view my rocket design in unfinished mode the fin look like they are not flush with the air frame. Can anyone suggest a fix.
  20. 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...