Hi Vance,
I did stick WD40 in one & it promptly started
leaking but just out the wiring. I had potted the
wires with
vinylester resin but have redone them
with epoxy. The finished looking actuator on psubs was a
photo montage put together to show Frank what I was
going to do.
I've changed design since then. I've fiberglassed
my actuator because some of it was empty space
& I hacked off this section & covered it.
I'm trying to come up with a no fiberglass option.
It was such a pain doing the fiddly
bits; & finishing it so it looks reasonable.
Alan
----- Original Message -----
Sent: Sunday, March 28, 2010 6:19
AM
Subject: Re: [PSUBS-MAILIST] Rudder
Indicator using 3 Reed Relays
Thanks. Nice work. Have you
flooded one with oil yet? Pressure tested it? I'd be concerned about all those
seams.
Vance
-----Original
Message----- From: Alan James < alanjames@xtra.co.nz> To: personal_submersibles@psubs.orgSent:
Sat, Mar 27, 2010 12:17 pm Subject: Re: [PSUBS-MAILIST] Rudder Indicator
using 3 Reed Relays
Vance,
Here's a link to my actuator on psubs. It will
give you an idea how they work.
Mine seems to be totally different than Franks. I
like his better, much less bulky.
One concern I had was the little micro
switches controlling travel, which I felt could get air trapped
in them & randomly stop the actuator at depth
due to the compensating oil pushing on their switch.
I poked a hole in mine with a hot needle just to
be sure. Also because WD40 doesn't like some plastic
I'm compensating with something more viscous
which will have more trouble penetrating into these little
devices.
Alan
----- Original Message -----
Sent: Sunday, March 28, 2010 4:05
AM
Subject: Re: [PSUBS-MAILIST] Rudder
Indicator using 3 Reed Relays
I'm starting to get
really interested here, Frank. Would you send me the manufacturer info on
these things? I'd like to have one in my hand to see what I can see.
Vance
-----Original
Message----- From: ShellyDalg@aol.comTo: personal_submersibles@psubs.orgSent:
Sat, Mar 27, 2010 10:49 am Subject: Re: [PSUBS-MAILIST] Rudder Indicator
using 3 Reed Relays
Hi Hugh. Yes, speed is a concern. The actuators don't have the shaft
coming out the back so the overall length is increased to 14 inches
to include the rod in the "closed" position. Oil compensation will
negate the pressure differential, so just getting them sealed should take
care of that.
This particular unit is rated at 40 pounds push/pull, holding power is
100 pounds, and full load speed is .7 inches per second with a 6 inch
stroke. I also have a 12 inch stroke one that is rated at 150 pounds
push/pull but it's speed is slower at .4 inches per second. The length is
about 17 inches. The shaft on both is 5/8 inch diameter and the casing is 2
inches square.
Frank D.
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