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Frank, I didn't follow
the release mechanism explanation but it sounds very intriguing. D'you have a
diagram you could upload?
thanks,
Alec From: owner-personal_submersibles@psubs.org [mailto:owner-personal_submersibles@psubs.org] On Behalf Of ShellyDalg@aol.com Sent: Wednesday, February 14, 2007 8:55 PM To: personal_submersibles@psubs.org Subject: Re: [PSUBS-MAILIST] through-hulls I've seen the linkages passing through the hulls for steering, and I think
a better way to do that would be hydraulics. There are several off-the-shelf
hydraulic positioners available for just that kind of application.
The system doesn't use a pump, but basically uses a steering wheel pushing
a piston, like a two way master cylinder, piped to an exterior two-way
cylinder connected mechanically to the rudder. Very low tech, and not prone to
leaks.
As for the buoy release, I am building one for my sub that is really just a
tube and ball valve inside the sub.
When I open the ball valve, the tube fills with water, and the buoy floats
out and up. The buoy is connected to the bottom of the tube with a small
stainless cable spooled on a pin.
The 3'' valve isn't cheap, but the rest is. I will be able to see the buoy
release through the window, to verify that it has deployed.
Additionally, I expect to be able to use the same tube to jettison excess
air or accumulated condensate water by opening the valve just enough to release
the whatever, but not enough to release the buoy, and pump the air or water into
the tube.
No moving parts spinning in a through-hull, just a big ball
valve.
Frank D. The contents of this e-mail are intended for the named addressee only. It contains information that may be confidential. Unless you are the named addressee or an authorized designee, you may not copy or use it, or disclose it to anyone else. If you received it in error please notify us immediately and then destroy it. |