yet another HEAR valve flipbook
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description
This is one of several recordings made of the HEAR valve on my GB Semi firing. It is recorded at 2000 frames per second. Focus and lighting aren't too great because the box that I have rigged up as a backstop was soaking wet from a water leak, so I was aiming up over my house and not able to focus directly on the gun. It was a huge pain just to get the gun in the frame while shooting at the angle I needed because there was nobody around to help me with the camera.
This recording shows the valve cycling twice. The second time that the valve cycles there is no projectile in the barrel. As expected the valve cycles faster without a projectile.
reference objects
There is a plastic strip with marks every inch sticking out right next to the piston.
additional media
related links
flipbook measurement toolmy high speed camera
GB Semi
HEAR valve flipbook 1
another HEAR valve flipbook