As I suggested before, air bumperramses wrote:And I still need advice on a bumper for a 4" toolie valve. I was thinking multiple tennis ball halves.
![Wink ;)](./images/smilies/icon_e_wink.png)
As I suggested before, air bumperramses wrote:And I still need advice on a bumper for a 4" toolie valve. I was thinking multiple tennis ball halves.
hectmarr wrote:You have to make many weapons, because this field is long and short life
Yes. The discussion starts here. It wasn't just SB15mark.f wrote:Therefore, shouldn't the energy of the piston at the end of its travel be about the same for heavier or lighter pistons (of the same diameter)?
Therefore, shouldn't the energy of the piston at the end of its travel be about the same for heavier or lighter pistons (of the same diameter)?
POLAND_SPUD wrote:even if there was no link I'd know it's a bot because of female name
Sure, why not?Labtecpower wrote:Today I tweeked the sights on my copper gun, and tried out a new projectile. I got 1" grouping on a distance of 8 meters. Pretty cool for a smoothbore gun I think!
I like the projectiles because they don't tumble in flight. All the shots made nice round holes in the furniture board.
Anyone wants pics?
Sorry I didn't see this until now. No, actually it wasn't. I grabbed enough points from the GGDT graph to do a quartic regression on my graphing calculator, then assumed the piston would only retract far enough to open to full flow before it stopped gaining energy, and used my calculator to take the derivative of the graph when the piston would be retracted fully.ramses wrote:Was your estimate based on d/4 and uniform acceleration thorugh that time frame?
POLAND_SPUD wrote:even if there was no link I'd know it's a bot because of female name