SpudFiles

jackssmirkingrevenge wrote: ↑

Thu Oct 20, 2022 8:50 am

hectmarr wrote: ↑

Thu Oct 13, 2022 11:30 am

It's not water, but if I pass a cotton ball through the inside of the barrel, it comes out quite wet.

Putting some water in a sound suppressor to enhance the effect is a well-known trick for firearms, the fluid helps to cool the hot gasses and thus lowers the pressure. I would not be surprised if it is a factor here too, heat is certainly important and even HGDT makes a difference between "insulated" and "adiabatic" chambers when calculating power.

What you think makes sense. Besides, my opinion is that the coefficient of friction should increase a lot, because the water deposited in the bore of the barrel, in the form of micro drops, accumulates when the pellet advances towards the mouth of the barrel, do not forget that it is well adjusted, and at those speeds, water is hard as a solid. Both questions would explain what I observe.

hectmarr wrote: ↑

Thu Oct 20, 2022 6:57 pm

Besides, my opinion is that the coefficient of friction should increase a lot, because the water deposited in the bore of the barrel

That's a good point too, any water in the barrel ahead of the projectile is mass that has to be accelerated and would decrease performance.

Perhaps a tank cannon style bore evacuator would help

Oh yea!!!