[PSUBS-MAILIST] trackdrive

["Carsten Standfuß " via Personal_Submersibles]

http://articles.maritimepropulsion.com/article/Iguana-29-Amphibian-4393.aspx

http://www.besportier.com/archives/iguana-amphibious-yacht-with-caterpillar-tracks.html

http://modelscale.free.fr/histoire/SubtankWM_P/

http://www.uboat.net/types/steufel.htm




"Cliff Redus via Personal_Submersibles"
<personal_submersibles at psubs.org> schrieb: 

Hank,


You have hit my key issues with tracks integrated into boat.  I will add
one more.  You are adding a lot of weight/cost/complexity for some thing
that is used only on launch and retrieval.

Maybe I should use the big DC traction motor I am taking out of the 
R300 as well as the motor controller and old joystick and build a
submersible  powered tracked launch and retrieval sled.  Support diver
drives the sled with the R500, pilot onboard, off a flatbed trailer on
to the beach, and out far enough to lift the R500 off the sled. Reverse
process on retrieval.   Could use it to launch off both beach sand and
conventional ramp.  Add enough batteries to make the sled negatively
buoyant when the R500 lifts off the sled.


Could work.


Cliff


From: hank pronk via Personal_Submersibles
<personal_submersibles at psubs.org>
To: Personal Submersibles General Discussion
<personal_submersibles at psubs.org> 
Sent: Thursday, July 24, 2014 6:51 AM
Subject: [PSUBS-MAILIST] trackdrive



Alan,
The fellow that helps me test and dive my subs is a huge fan of tracks
on a sub.  We debate this for hrs after a big struggle at a lake trying
to launch.  This idea would be the ultimate system.  The problem is, if
it were electric, the power consumption would be huge and put a big
drain on your batteries.  I figured the only way to do it would be with
a gas motor hyd power pack.  Hook up the quick connectors to launch,
then disconnect.  The next problem is, tracks, even rubber, are very
heavy. The setup could weigh 1,000 lb easily if it is carrying a sub. 
Then there is the cost, think big!  :-)    It would be the ultimate
though!
Hank

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