RHF wrote:


Better would be a Cam-Valve with a Dead Weight
counter-balance : Pull/Blow the Up-Lock Pins and
Gravity over time {Minutes to an Hour} does the rest.


That's way too slow. A replaceable cylinder loaded with whatever they
use for explosive bolts; wouldn't need much; and the ram could be
ratcheted for locking after the charge fires. All you need is a few
thousand PSI for a 10th of a second.