Started by mman, November 26, 2011, 10:05:34 AM
Quote from: mman on November 27, 2011, 09:23:01 AMYeah this is just for PCP guns. I once measured velocities (Air arms S410) from many different pellets with same regulation setting and cylinder pressure. Interestingly enough they all gave almost exactly the same muzzle energy. I used this information when testing the model. I'm just saying that this result shows that effect of pellet seating, hardness and shape are insignificant.
Quote from: mman on November 27, 2011, 10:06:40 AMOne thing I would like to add to the model is correlation with regulation length and cylinder pressure. The correlation is different for every gun but I think it could be solved from the measurements of muzzle velocity and cylinder pressure. I think the valve's equation of motion is something like this:striker rod impact force(t) - firing valve spring force(t) - cylinder pressure force(t) = firing valve acceleration(t) * firing valve mass
Quote from: mman on November 27, 2011, 09:23:01 AM However I can't be absolutely sure that those effect you mentioned can always be ignored but it is very hard to know right input values for them even though I wanted to take them account.