In our first submersion test this evening, the chum cannon worked as expected. The piston moves more slowly than in air due to the limitation of only 4 quarter inch holes for water to flow through. We did experience a small leak in the chamber. The source appears to be a failure in the acrylic end seal. The use of PVC cement is not ideal for acrylic and has repeatedly shown poor strength. Now I have to figure out how to get the water out and re-seal the end.
