Re: [PSUBS-MAILIST] Oil Compensated Thursters

>> Yes during charing we have to reopen each cell - hundreds of plastics screws 
- and the bubbels grab all the time some oil and make >>the battery outside 
surface wet with oil - so the first time there was a little oilfield were 
Peppers dive.. 

    I've never heard Phil Nuytten say anything about this problem,  Phil are you 
out there?   A friend of mine was experimenting with a battery that he had 
submerged in mineral oil in his back yard,  it was enclosed in a plexi glass 
container and topped off with mineral oil.  He was discharging the battery using 
an electric fan, the thing was forming these very small micro bubbles which 
basically was turning into foam.  Feeling a little nervous about the situation 
he decided to in the house while the thing discharged.  The next thing that 
happened was a loud explosion and he could see battery parts raining down on the 
other side of the house!   I would like to use the oil system but I don't want 
to blow up either !  Phil could you shed so light on this.

Brian

----- Original Message ----- 
From: <MerlinSub@t-online.de>
To: <personal_submersibles@psubs.org>
Sent: Friday, November 17, 2006 16:57
Subject: Re: [PSUBS-MAILIST] Oil Compensated Thursters


> "Brian Cox" <ojaivalleybeefarm@dslextreme.com> schrieb:
> > Carsten,
> >                Did you have any problems with the oil in the battery 
compartment foaming when the hydrogen bubbles form?
> 
> Yes during charing we have to reopen each cell - hundreds of plastics screws - 
and the bubbels grab all the time some oil and make the battery outside surface 
wet with oil - so the first time there was a little oilfield were Peppers dive.. 

> Later we compensate the batterys with air. Some other problems like sometimes 
acid in the thruster but can be easier improved..  At the moment we study air 
compensate gel-batterys.. 
> 
> The Diesel in Euronaut is watercooled - I think a aircooled get maybe to hot. 
> Contact direct your Deutz Dealer and request a real engine with that 
requirement and a scetch of the engineroom. One of there engineers can do the 
calculation that shows if your engine room gets to hot or not. I have a water 
cooled Mercedes Benz V6 10 Liter displacment with 180 hp in the engine room. 
>From the cooling system is a bypass to the oilcooler of the main gear  and a 
other bypass to the heater system of the cabin.. 
> 
> Best regards Carsten - and the Deutz engine is a good one.. 
> 
> > Also what kind of engine do you have in Euronaut?   I'm sure you are 
familiar with Deutz air cooled diesel engines do you think they would work good 
in a sub?
> > 
> > Brian
> > 
> > ----- Original Message ----- 
> > From: <MerlinSub@t-online.de>
> > To: <personal_submersibles@psubs.org>
> > Sent: Friday, November 17, 2006 04:48
> > Subject: Re: [PSUBS-MAILIST] Oil Compensated Thursters
> > 
> > 
> > > One day a Peppers air compensate motor flooded with fresh lake water 
during the dive. Was clear noticeable - the motors turns lower and harder. 
> > > 
> > > The oil inside the motor has to be turned like in a water break and thats 
needs engery. 
> > > 
> > > Vance I compensate the oil inside the small motors that way: 
> > > 
> > > Make a tread fill hole in the casing - and fill the motor complete with 
oil. 
> > > Than make a long screw (with o-ring under the head) - longer than needed 
inside the hole as plug. The longer as needed part of the screw inside the 
casing compress the little maybe remain airbubble. 
> > > 
> > > On oil compensate batterys we used shampo-bottles as compenste bags. 
> > > 
> > > best regrads Carsten
> > > 
> > > 
> > > <vbra676539@aol.com> schrieb:
> > > > Alec, How do you compensate the oil? I'd love to try some of those 36 
volt Minn-Kotas. They've got a ton of umph, and might get me back a couple of 
hundred pounds of payload from George's Model-T Rex style thruster cans. And it 
would be cheap, too. Vance 
> > > >  
> > > >  
> > > > -----Original Message-----
> > > > From: Alec.Smyth@compuware.com
> > > > To: personal_submersibles@psubs.org
> > > > Sent: Thu, 16 Nov 2006 9:39 AM
> > > > Subject: RE: [PSUBS-MAILIST] Oil Compensated Thursters
> > > > 
> > > > 
> > > > I had an email conversation with Carl about a year ago on that topic. 
They're just straight air compensated, with Swagelok SS fittings tapped into the 
trolling motor casings. The reason I'd contacted him was to ask whether he was 
using air, because some on here maintained that at his depths, the partial 
pressure of O2 in air would be a fire hazard. I think his sub demonstrates it's 
not.
> > > >  
> > > > BTW Snoopy's trolling motors started out air compensated and are now in 
their second season with oil compensation. I have nothing at all against air 
compensation, and would go with that if my air bottles were outside the hull. 
But the way it was implemented on Snoopy the air was passed through the shafts 
from the cabin, and there just wasn't space to do it properly along with the 
cables. What's been interesting about the switch to oil is I can't notice ANY 
difference. The motors seem to pull just as strong, and even sound exactly the 
same as before. 
> > > >  
> > > > cheers,
> > > >  
> > > > Alec
> > > > 
> > > > 
> > > > 
> > > > 
> > > > From: owner-personal_submersibles@psubs.org [mailto:owner-personal_submersibles@psubs.org] 
On Behalf Of vbra676539@aol.com
> > > > Sent: Wednesday, November 15, 2006 11:17 PM
> > > > To: personal_submersibles@psubs.org
> > > > Subject: Re: [PSUBS-MAILIST] Oil Compensated Thursters
> > > > 
> > > > 
> > > > Oil compensated DC motors work just fine at moderate depths. Alvin had 
problems originally with brushes arcing, but he Hymak 5 hp motor used by Hyco on 
nearly everything they built was a serious workhorse. You get to tear it down 
and change brushes periodically as they wear faster, and they'll get the oil 
dirty, so you'll have to watch that. I was on Karl Stanley's web page last night 
and it looks to me like his Idabel is using about a case of trolling motors, and 
they must be compensated, as the sub is rated for 3000 foot service. Maybe we 
ought to ask him what the secret is, if any.
> > > > Vance 
> > > >  
> > > >  
> > > > -----Original Message-----
> > > > From: DJACKSON99@aol.com
> > > > To: personal_submersibles@psubs.org
> > > > Sent: Wed, 15 Nov 2006 10:35 PM
> > > > Subject: [PSUBS-MAILIST] Oil Compensated Thursters
> > > > 
> > > > 
> > > > Can anyone support this statement: "Scripps has tried to fill the DC 
motors with oil, but the oil gets between the brushes and the commutator, where 
the insulation properties of the oil causes problems. Although it would be 
possible to use high voltage to break through the oil film, the high voltage is 
a safety hazard for the divers." 
> > > > -- www.empiremagnetics.com/articles/deep_sea.htm
> > > >  
> > > > I was thinking about 24 or 36 volt oil compensated brushed trolling 
motors, but after reading the above I looked and could not find any examples of 
oil compensated brushed motors under 100 volts.
> > > >  
> > > > What are your experiences and thoughts?
> > > >  
> > > > Thanks
> > > > --Doug J
> > > > www.submarineboat.com
> > > >  
> > > > 
> > > > 
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