ramses wrote:It is limited to 1200 fps, but as far as what we can afford, that is still pretty good. with good lighting, some stills could probably be extracted involving lead splatter.
That would require a fast shutter speed, not a fast frame rate. As far as I know, few things have the right shutter speed for the job, and those that do require huge lighting.
This photo was the work of Pete off the UKSGC:
Needed a 1/10,000th shutter speed, the ball wasn't all that fast, and it's still blurring. Took about 4000W of lighting I think.
@camosoul77:
Average effective - not peak, which is a big difference. Peak pressure tells you whether it will blow up, average effective tells you how much muzzle energy you get per unit of barrel volume, so gives you an idea of a power/size ratio.
I was deliberately emphasising that point. Average effective is not usually used in firearms - or anywhere really. To be frank, I'm about the only person that really makes use of it on this forum, mostly to guestimate a combustion's power.
We can work out the average effective quite easily, as it's muzzle energy divided by barrel volume, with a constant to sort out the units (With ft-lbs and cubic inches, multiply the result by 12)
I did make a slight error before, the average effective is 21,000 psi for a 12,000 ft-lb shot from a 45 inch .50 BMG barrel. (The error was incurred by a lazy conversion to metric and back again.)
So it's closer to a sixth - and could probably be boosted to a quarter - of the .50 BMG's average effective pressure.
)
