My first failure :)

[YoungAstroEng]

Hello everyone, today i started to make my first rocket everything is okay i am trying to reach range of rocket at 6km.
But there is something wrong my rocket doesn't fly.
I get the messeage from openrocket

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[YoungAstroEng]

 

[tim cubbedge]

That message is pretty common in Open Rocket with supersonic speeds.

 

[YoungAstroEng]

how can we figure it out the ratio of length and the diameter of the rocket ? For example i want Apogee to be 6km.
information about my rocket :
Engine is N5800-CS and the second one is N2900-CL.
Can you help me to reach my dream to 6km.

 

[neil_w]

https://www.rocketryforum.com/threa...ther-support-question-for-that-matter.157409/

 

[Voyager1]

Check the link posted by Neil. It will suggest that you at least post your OpenRocket .ork simulation file here for us to check out.

A rather ambitious project for a “first” rocket!