Dan,
Its not proven but I think a digital compass with the sensor on a short
(0.8 M above the steel) mast and the readout on a convenient place is a
good option
They cost about 200-300 Dollar/ Euro and they dont consume much power.
Good luck with your sub!
Regards, Emile van Essen
----- Original Message -----
From: Dan H. <mailto:jmachine@adelphia.net>
To: personal_submersibles@psubs.org
<mailto:personal_submersibles@psubs.org>
Sent: Thursday, October 21, 2004 3:47 AM
Subject: [PSUBS-MAILIST] Tired of Going in Circles
Hello All,
Well, I've had My K-350 "Persistence" out several times this summer,
and now that the local waters are clearing up more as they get
cooler, I'll be getting in several more dives until it freezes. As
of yet, I haven't done a deep water test but dived manned to fifty
feet several times and had no problems. I don't care to take it any
deeper then that until I do an unmanned deep water test to five or
six hundred feet.
I've had a bunch of fun with it, even though I haven't seen anything
spectacular. With the practice, I'm getting better at controlling
it. It still bobs some as I'm submerging, but I now keep that down
to no more then four degrees fore and aft. Running a straight line
when going top speed (don't ask me how fast but it's faster then one
could row) is still difficult. The faster I go the easier it is to
get in a quick unintentional turn. I know a tail fin would help but
I don't think I want to add one yet.
The other thing that I need to do is install some sort of
directional device. I'm thinking a gyro compass. Once I loose
sight through the conning tower viewports, I'm traveling blind.
Even near the surface, unless the sun is shining through the top
view port, I can't get oriented and keep it there.
Does anyone know where I can get a gyro compass or anything else to
tell direction with, other then a new gyro for an airplane out of
the catalogue at $1600 a pop? Also, most airplane gyros seem to be
vacuum powered. I need either 12, 24 or 36 volt powered.
How do you other guys tell direction ? Keep in mind I've been
diving in pea soup where vis is no better then four feet. To give
you an idea how many pees are in the soup around here, at forty
feet, there is ZERO light coming from the surface. With the lights
off, IT'S DARK!!!!
Thanks for any help, Dan H.