Jim. I am taking a different approach to the rotating motor linkage. I'm
just not that comfortable with a shaft penetrating the hull and using a seal
there. I have a sketch on Frappr showing the side motor mounts (2) but
basically I'm using a pressure cylinder to move the motor between horizontal
and vertical. The through hulls are one for the electrical connection, and one
for the hydraulic line. The master cylinder inside the sub will be hand
operated like a brake pedal, coupled to a slave cylinder outside the sub which
through linkage will rotate the motor to horizontal. The system fails with the
motor in the vertical position.
Both through hulls have a ball valve on the inside, so if any leak
occurs, I can isolate that line. In the case of the electrical through hull, I
can pull the wires off the connectors and close the valve.
Here is the link to my frappr site. The cost of a small hydraulic
cylinder is low, and the hydraulic connectors are usually good for 600 psi
applications.
I'll also be using a similar approach for the rudders.
Frank D.