<html><body><div style="color:#000; background-color:#fff; font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:10pt"><div class="" style=""><span class="" style="">But wait there's more....below is a summary by Jim of advice for oil compensating & Carsten's <span id="misspell-1" class=""><span>cynical</span></span> </span></div><div style="color: rgb(0, 0, 0); font-size: 13px; font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; font-style: normal; background-color: transparent;"><span class="" style=""><span id="misspell-2" class=""><span>additional</span></span> points.</span></div><div style="color: rgb(0, 0, 0); font-size: 13px; font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; font-style: normal; background-color: transparent;"><span class="" style="">Alan</span></div><ul style="font-family: 'Times New Roman';
font-size: medium;"><li class="" style=""><i>o</i>: <<a href="mailto:personal_submersibles%40psubs.org" class="" style="">personal_submersibles@psubs.org</a>></li><li class="" style=""><i>Subject</i>: Re: [PSUBS-MAILIST] illustration is this what you mean sort of?? pressuriz...</li><li class="" style=""><i>From</i>: <a href="mailto:MerlinSub%40t-online.de" class="" style="">MerlinSub@t-online.de</a></li><li class="" style=""><i>Date</i>: 05 Dec 2010 09:43 GMT</li><li class="" style=""><i>Reply-to</i>: <a href="mailto:personal_submersibles%40psubs.org" class="" style="">personal_submersibles@psubs.org</a></li><li class="" style=""><i>Sender</i>: <a href="mailto:owner-personal_submersibles%40psubs.org" class="" style="">owner-personal_submersibles@psubs.org</a></li></ul><div></div><hr style="font-family: 'Times New Roman'; font-size: medium;"><div></div><div style="background-color: transparent;" class=""><span class=""
style=""></span></div><div></div><pre class="" style=""> 9. Run the motor a half hour with the boat in the water and see may how the hot oil gets out of the weakest point by internal overpressure..
10. Switch of the motor and let the boat still in the water for two hours or so.
Open the engine the next weekend in you shop and found partly water in it because of the underpressure creates as the oil cool down..
The best for the seal is if it see no pressure differtial doesnt matter from which side. So logical the bladder has the same high as the motor.
A deeper installed bladder indicates a leak by oil getting out in the water, A higher install may not.
A higher installed bladder indicates maybe allready a leak onshore - and thats maybe the better solution.
The best solution is that the hose work between using device and bladder is from clear material and has a loop higher than the user and the bladder. So air in the system can be easy spotted.
See here: <a rel="nofollow" href="http://www.euronaut.org/content/upload/notes/IMG_3321a.jpg" class="" style="">http://www.euronaut.org/content/upload/notes/IMG_3321a.jpg</a>
Euronaut has seven bladders on:
- Stern Thruster (oil)
- Bow Thruster (oil)
- Anchor winch motor (oil)
- Propeller shaft (oil)
- Void space frame cave between fwd.ballast tank and pressure hull (coolant water)
- Void space frame cave between aft.ballast tank and pressure hull (coolant water)
- One bag for all three fix rudder skegs (coolant water)
- Side Rudder and Stern deeprudder are also filled with c.water but without bags.
See also the other mail I just send.
vbr Carsten
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<JimToddPsub@aol.com> schrieb:
> All,
>
> I'm having difficulty understanding the need for the bladder, and it seems
> like an additional complication and an additional point of vulnerability
> along with the line. How would this work:
>
> 1. Install a bleed valve at the uppermost point of the motor housing.
> 2. Install a fill valve at the bottom of the motor housing.
> 3. Attach a fill line (equipped with a pressure gauge) to the fill valve.
> Purge all air from the fill line prior to attaching it to the valve.
> 4. With the bleed valve open, fill the motor from the bottom until oil
> discharges from the bleed valve.
> 5. Turn the motor shaft by hand and vibrate the motor to release any
> trapped air bubbles. Close the bleed valve and allow the motor to sit for a
> couple of days undisturbed.
> 6. Open the bleed valve and add more oil to drive any residual bubbles
> out. Close the bleed valve while pressure is still being applied to the fill.
> 7. Adjust the pressure from the oil pump to the desired pressure, then
> close the fill valve.
> 8. Release the pressure on the oil pump/fill line, then disconnect the
> fill line.
>
> This seems logical to me, but I'd like to hear from the voice of
> experience. Does 14 lb. seem like a reasonable differential pressure for set up? I
> expect to start with new Minnkota motors, and I haven't addressed sticking
> with the factory seals vs retrofit seals. My intended operational depth
> is 300 feet.
>
> As always, comments and criticisms are eagerly invited.
>
> Thanks,
> Jim</pre><div></div><div class="" style=""><br class="" style=""></div> <div style="font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; font-size: 10pt;"> <div style="font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; font-size: 12pt;"> <div dir="ltr" class="" style=""> <hr size="1" class="" style=""> <font size="2" face="Arial" class="" style=""> <b class="" style=""><span style="font-weight:bold;" class="">From:</span></b> Alan James via Personal_Submersibles <personal_submersibles@psubs.org><br class="" style=""> <b class="" style=""><span style="font-weight: bold;" class="">To:</span></b> psubs.org <personal_submersibles@psubs.org> <br class="" style=""> <b class="" style=""><span style="font-weight: bold;" class="">Sent:</span></b> Tuesday, July 22, 2014 8:28 PM<br class="" style=""> <b class="" style=""><span style="font-weight: bold;"
class="">Subject:</span></b> [PSUBS-MAILIST] oil compensation<br class="" style=""> </font> </div> <div class="" style=""><br class="" style=""><div id="yiv7453128405" class="" style=""><div class="" style=""><div style="color: rgb(0, 0, 0); font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; font-size: 10pt; background-color: rgb(255, 255, 255);"><div class="" style="">I found some comments that Carsten made about oil expansion & compensation.</div><div class="" style="">Someone was interested in hearing them if I found them. The thread was 5 Dec 2010.</div><div class="" style="">Alan</div><pre class="" style="">Alan and the other gentlemens,
our expierence with oil filled motors, batterys or even propeller shafts is that the oil expand if the motor is runing longer time.
Simple because its warm up. We had that problem on Eurosub on the first dives.
And on Euronaut we filled the bladder complet up and the get pretty hard in the hot summer just by sun heating the sub.
A full filled bladder with over pressure creates a lot of interal
pressure in the wrong direct - a lot of force for the bladder itself and hose work.
Therefore our bladder are only half expand during the filling. But still free of any air.
An other point is that the bladder has to be not to small.
To create a slightly overpressure on the motorseal you just install the bladder below the motorcasing.
But we found out that on trolling motor (electric outboards) this is not nessesary. There seals are good for some
douzend feets at least - so you can install the bladder else were.
Filling is simpler if the bladder is slightly over the motor - you can vent the system direct on the filling point.
Another point is that we install now one bladder per motor - in the earlier sub (Sgt.Peppers) we install a central
one for all motors. Hard to find a leak after a dive with all the T-crossing piepings and motorseals..
vbr Carsten</pre><div class="" style=""><br class="" style=""></div></div></div></div><br class="" style="">_______________________________________________<br class="" style="">Personal_Submersibles mailing list<br class="" style=""><a ymailto="mailto:Personal_Submersibles@psubs.org" href="mailto:Personal_Submersibles@psubs.org" class="" style="">Personal_Submersibles@psubs.org</a><br class="" style=""><a href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles" target="_blank" class="" style="">http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles</a><br class="" style=""><br class="" style=""><br class="" style=""></div> </div> </div> </div></body></html>