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(Divergent section) what is wrong ?


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After a few tests, i have notice something what i want to share...

Here i have 3 tests with the same nozzle throat same core same fuel everything the same except the divergent section of the nozzle...

 

Here 12 degree angle with 21mm exit area (CATOed)

 

Here 12 degree angle with 17mm exit area (Fast burn, i guess high pressure )

 

Here 25 degree angle with 25mm exit area (Slower burn, i guess lower pressure)

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