Originally Posted By: PeteM
Originally Posted By: Rocketman
Originally Posted By: Chuck H
Don,
do you mean to say that: if the pressure drops in the choke, there will be, effectively, no expansion (no change in strain value) of the barrel at the choke?


I think there will be significant intercolumn pressure within the choke section, but it will be dropping from entry to exit. I would expect strain gauges to read it nicely. Two or three gauges would make a nice data set; one at the entry, one at the exit, and one midway and/or one a couple of inches before the entry.


Don,

That is the reason Chuck and I need you to blow up a couple of guns for us! grin


Pete & Chuck.

I don't envision blowing up any guns- yours, mine, ours, or theirs!! We need a very simple single barreled gun where we can have cyl and full choke. I'm imagining a a choke section like a very long extended choke tube. We need to provide a means to pressure calibrate strain gauges at all locations. Chuck, my chronois oldand hasn't seen the light of day in years (I've had easy access to betterinthe recent past, but not now), so, I'll check mine out and let you know if I need yours.

I'm thinking a 10 shot series for each strain gauge with a common factory load. Six gauge locations on two chokes would be 120 shots. I'll provide ammo. Also, I'll capture patterns from each choke and we can see if Andrew Jones will run statistics on them. Chuck, what sort of computer will your pressure rig need? Pete, what do you have in mind for a gun?