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Lets be patient...Franks sub is majical I just know it! David Bartsch From: joeperkel@hotmail.com To: personal_submersibles@psubs.org Subject: RE: [PSUBS-MAILIST] retractable buoy Date: Thu, 29 Oct 2009 10:23:09 +0000 "..... How big and what type of cable would be required to get a voice out of a submarine. Frank D......"
Frank,
Three things I found when I looking at this for Alvin Jr.
- Kittredge's thru hull for the crank on the claw, makes for a handy manual retract mechanism (for ROV too) in another appropriate location.
- There is a "design spiral" with these floats, the bigger (longer) the cable, the bigger the float to suspend it. - Snoopy's rig, was what I would have likely shot for. Your saucer shape, will capture much attention. There will be the inevitable Cousteau comparisons, and reminiscing. What a showman he was! Too bad no-one has been able to recreate the magic! Joe From: ShellyDalg@aol.com Date: Thu, 29 Oct 2009 00:24:57 -0400 Subject: Re: [PSUBS-MAILIST] retractable buoy To: personal_submersibles@psubs.org In a message dated 10/28/2009 6:28:23 P.M. Pacific Daylight Time, edlunddds@comcast.net writes:
I have been toying with retractable devices for a surface buoy Just some random thoughts on releasing a buoy.
Dean has a little "torpedo" buoy he can shoot out if a problem arises.
I think he once said it was a wooden dowel type float with fishing line wrapped around it.
It seems like there are several issues to consider here.
An emergency buoy that's released says the sub is stuck, so retracting it may not be necessary.
The emergency buoy should have a transmitter on it, and possibly a communication cable attached so a surface boat could plug in and talk to the stranded subbers.
It could also be considered to have the capability to guide a line and hook down to grab the sub and haul it up.
Again, this type of application may not need to be retracted.
A buoy that is to mark the submarine so surface traffic doesn't run over the sub would need a light and/or flag
warning boats away. Retracting the line would be good to avoid entanglement. As the sub nears the surface, the line would get shorter so it stays clear of the prop. A light so it can be seen in the dark, a "diver down" flag large enough to be seen by passing boaters during the day.
Another suggestion a while back was to float an antenna so radio transmission could be done submerged.
Or possibly use it to obtain GPS signals.
On making a retractable line.....
I would think a small waterproof motor could be geared to a reel without too much work or expense.
There are a few examples of reels on the psub site. Depending on how large the cable was, it could be quite small.
Much like our submarines themselves, any buoy system needs to have a specific function or goal to achieve and the design will be driven by those parameters.
I'm just not sure how useful a little float would be for just "marking" a sub. Good visibility through the windows, some collision avoidance sonar, and a long antenna that breaks the water before the sub gets up.
I expect to make most dives with a surface boat nearby, so sub to surface comms is more useful.
If a sub is down and "stuck" then the same applies. Using the line as a guide to drop something down to the sub could be useful, but still, I'd rather have comms to the surface. How big and what type of cable would be required to get a voice out of a submarine.
Frank D.
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