SpudBlaster15 wrote:Very nice. I've seen many videos demonstrating hydraulic shock, but certainly nothing of that scale. Impressive stuff.The velocity was lower then expected but I think it is because the burst disk slips out of the union on one side and resticts flow.
That is quite likely. I had a similar issue with unmodified hardware store unions on my smaller hybrid designs. If the disk managed to seal effectively enough to allow the launcher to be fired, it would often partially slip out of the union, lodging in the barrel port and heavily constricting flow.
I achieved a solution by grinding down the tapered surface on the female component of the assembly. As your McMaster union uses flat mating surfaces, it should solve this issue as well.
Thank you, I hope I can get my union and a new fuel gauge soon. I have some interesting shots in mind.
What do you mean by the female part? Didn't you grind the male lip off?
I would like to find a way to fix the unions over here for use in hybrids since I would hate paying 50USD for shippin on every union I need..