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Hello all, I was working on a 2 stage rocket on Open Rocket software. While the booster reaches its apogee, OR gives "Exception" warning as you can see from the attached image. What could be the reason of this warning? Normally, it should be plotted as the booster deployed the parachute and...

Hello all, I want to build the rocket that has 2 M class motor with stage seperation. Do you have any ideas about non pyro staging systems? CO2 systems with servo are not suitable. Thanks in advance! John

Hello all, As a beginner for open rocket, I want to ask what the "Roll Characteristics" analysis tell me, or what kind of information does it provide? Also, is there any guide that explains the each analysis option in the Open Rocket in detail? I couldn't see in the Open Rocket webpage...

Hello everyone, I want to calculate the force that is applied to the parachute and its cords, when the rocket deployed at apogee. Rocket deployed by black powder. Do you have any methods to find this force? Thanks in advance!

Hello all, I am trying to design a supersonic rocket on Open Rocket program with N2900 motor. I wonder that how I can keep the stability between 1,5 and 3 during flight, since the propellant weight is really high and critically effects the center of mass of the rocket to the forward during the...

Hello all, I am planning to launch the high power rocket. I have chosen Iris Ultra 60" parachute as main and 48" fruity chutes as drogue chute. I was wondering that if this parachute configuration is suitable or not for the rocket that has weight of 20kg. Thanks in advance! John

Hello all, I am looking for Eggtimer TX 868Mhz, if anyone selling it please put a comment or directly message to me. Best! John

Hello all, I want to have GPS Tracking by using Eggtimer TX. Can I achieve this by connecting yagi antenna to Eggtimer receiver instead of SMA Antenna?

Hi everyone! I am looking for 2x eggtimer TX Transmitter. Soldered or not doesn't matter. If you want to sell, please contact, I really need them urgent because of my time limit. Thanks in advance!

Hi everyone! I am designed a model rocket and its maximum velocity is 0,83Mach. One of my friends said that after 0,8Mach is problem for rocket because this speed is rated as "Transonic speed" so my airframe can be damaged in the air. Is this argument true? Airframe is fiberglass . Thanks in...

Hi all! I am gonna use Cesaroni M-2150 Motor to launch my rocket. With this motor, I want to decrease the maximum acceleration value of the rocket (below 8G, currently 9,7G). Do you have any advice about decreasing G? Thanks in advance!

Hi all! I want to decrease the static margin of my HP rocket. I have designed it in OR and I want to have my stability vs. time graph between 1.5 and 3 during the flight, how can I achieve it? I added my .ork file so that you can make comments on that. Deployment system selected as non-pyro...

Hi everyone! As you all know we are frequently asking our questions to this forum. But for our competition team, I need someone to advise us about some tactics and tricks, stay in contact frequently via messaging or any kind of platform doesn't matter. Here is the details about our team and...

Hi! I have an error on my rocket as "Recovery Device Deployment at High Speed" How can I solve that problem can anyone help me on that? Thanks in Advance!

Hi all! There is a problem in Open Rocket on my scenario. I couldn't achive to fix it. Here is the details: A dual deployment rocket climbs to 3000m. When it reaches to that level, it should drop a payload with seperate parachute and payload descends with its own parachute. Rocket also deploys...

Hi all! I want to get information about "minimum static equilibrium" of my rocket that designed in Open Rocket. How can I find it? Thanks!

Hi everyone! As we already now, the static margin above the 2.00 is called "overstable" for a rocket. Can you tell any disadvantage of overstability, if the main objective of the rocket is only climbing to specific altitude. All comments are welcome! Thanks!

Hi all! I want to make my dual deployment ejection system as non-pyro. I have already searched on CO2 systems. But if you have any systems that you used before, different than CO2, I want to know them. All advices about non-pyro systems are welcome, thanks!

Hi all! I have launched a dual deployment rocket to 3000m with the motor Cesaroni M1675. It flew really well but none of the parachutes were deployed. Then we learned that cable connections were broken. It happened during the lift off we guess. So how can I protect the electronic cable...

Hi! I want to make igniter for having ejection charge on canisters, but I have no idea about that. How can I make igniter for dual deployment rocket canisters ?