openrocket

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...

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...

Hi, There is two stages for my rocket in openrocket. When i try to plot the data of stability margin calibers I got the "Unknown Bug" message screen. But I get an error for only one stage while exporting data. Is there any solution?

Hi, I want to deploy both nose cone and payload together at apogee in openrocket. I couldn't even figure it out how to deploy payload. There is a parachute in the nose cone section but when I open it, the mass of the rocket doesn't change, so the payload stays in the rocket. Is openrocket able...

I am relatively new to the rocket simulation world and I am looking to leverage the knowledge and experience of those that may be further down the road. I'm currently using RockSim as I've been simulating various part and engine configurations for a 1.68x Orbital Transport booster / glider...

Hi there, I wonder if it is possible to run a simulation in OpenRocket without the need of the GUI or the need of interact with the GUI. I am aware of simulation listeners, but these require some interaction with user interface. In brief, I want to run a simulation and get its results without...

I have Ubuntu 18.04. The guide on https://wiki.openrocket.info/Downloading_%26_Installing says to install using $ sudo apt install openrocket which I did. This seems to have gone okay, except for head: can't open '/etc/ssl/certs/java/cacerts' for reading: No such file or directory and...

I was writing some code, which would take data from OR to test a few algorithms. In particular, I needed pitch, yaw and roll rate data. However, when I checked OR, I found something very strange. Pitch rate (and probably roll/yaw rate) are not continuous. In fact, if you invert the data...

I found something in Openrocket I've never seen before. I'm sending my mammoth up on a G33 and adjusted the parachute opening to reflect the chute release I'll use (no main deploy at half a mile up please) I imagined I'd have to make a sudo-chute to simulate the airframe tumble so it didn't...

Hi all, I am currently designing my own level 2 rocket and I am having issues finding a proper fin size that works. I have read that generally you want your fins to have a root length of 2 calibers, a tip length of 1 caliber, and a height of 2 calibers When I add fins of this size to my...

I've been designing a simple one stage rocket with OpenRocket, which allows the user to design and simulate their designs. I was always told that a general rule of thumb for a rockets stability is that the center of gravity should be 1-2 calibers above the center of pressure. With this rule...

Hi everyone! Long-time lurker, first-time poster. I'm intentionally reposting this here and deleting the old thread, because on reflection it doesn't quite fit in "Rocketry Electronics and Software." No replies over there to miss, either. I'm exploring high-altitude darts, and conversations...

Hi everyone! Long-time lurker, first-time poster. I'm exploring high-altitude darts, and conversations with a friend of mine with a large amount of HPR experience has led to some design exchanges. Unfortunately, we both use different sim software - he uses RockSim, and I use OpenRocket. This...

I have a 24mm motor mount that is 95mm long. How can I add the 25mm adapter when using D12 and C11 motors (which are 70mm long) but remove it when using E9 motors (which are 95mm long)

Is it possible to dim the nosecone in openrocket? how? I read this was good for minimizing pressure drag.

Hi everyone, I'm new to the hobby and am working on a project to launch a rocket that was built by a group of students before me. They did all their calculations and design in OpenRocket and were kind enough to leave us all their .ork files, but I cannot get OpenRocket to launch. I downloaded...

Hi, Everyone what's up! :D Puns intended...lol....I'm new to the forum. Where can I find OpenRocket Sims for an Estes Goblin? Thx

I am currently in the middle of designing a rocket in OpenRocket that uses duel deployment. I was thinking about maybe using a streamer instead of a drogue chute. However, it seems to be acting weird when I put the streamer in. For example, if I don't put any recovery devices in the rocket at...

In a compressible flow, when a fluid flows through a convergent nozzle, the fluid increases its speed; But when the fluid arrives at 1 mach speed, the convergent nozzle will desacelerate the fluid, but a divergent nozzle will acelerate the fluid. I would like to know if the software OpenRocket...

I just discovered OpenRocket and feel like a kid in a candy store. This is going to be fun. I'm starting by designing and building something small and simple but ultimately would like to try to build a rocket with two bodies (two simple rockets glued side by side) and even three bodies (a la...