MrCrowley wrote:Oh yeah wow, I didn't notice how much the chamber pressure increased with the extra 9 ignition points. Jumps up to around 20,000PSI, for an increase of about 10ms.
Is there a problem with sticking a longer barrel on it? Hybrids aren't very portable to begin with, especially one like this.
No I think that's what I'll do, put a longer barrel on it. This is really just a concept design so I shouldn't be too concerned with those sorta things anyway.
[quote="ramses"]All right, I got 799 m/s. But for a real design IT WILL NEVER WORK. suffice to say that the aspect ratio of the chamber is... well... *em*
HGDT reports the maximum chamber pressure as 221ksi, but the graph only shows a peak at around 16ksi. It is also extremely inconsistent in that the velocity varies 200m/s between runs with identical parameters./quote]
I've noticed that as well. After running the sim I change an input, run the sim, then change it back and run it again, different results... But for now I think it is still the best way to optimise the gun.
Once I get Solidworks down pat I'll upload the design for you all to have a look over