Comments (5)
If possible, I need an answer by the end of the week. as we are planning on a sub scale flight in 2 weeks using this motor.
Thanks,
Ben
from openmotor.
Hi Ben,
I can look at the files once I'm back to my main computer later, but for now, the first thing that pops into my head is the efficiency field. If this value is directly copied between burnsim and openMotor you will see different results because burnsim does no additional thrust coefficient adjustment beyond multiplying by the efficiency, while openMotor takes divergence angle and throat length into account. First verify that the propellant mass is the same in each sim to make sure that all grains were copied over, then check efficiencies.
-Andrew
from openmotor.
from openmotor.
The exit diameter being different will have an impact, as well as the efficiencies being the same as I mentioned in my last message. Because openMotor accounts for more than burnsim, you don't need to enter as much of a loss as you do in burnsim. Nearly all of my motors end up with ~0.95 efficiency in oM, while I was more used to 0.85-0.9 in BS.
from openmotor.
from openmotor.
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