The datasheet said that
it is an solvent; Will not solve the plastics in the engine??
Emile
Van:
owner-personal_submersibles@psubs.org
[mailto:owner-personal_submersibles@psubs.org] Namens Alan James
Verzonden: maandag 27 december
2010 20:36
Aan:
personal_submersibles@psubs.org
Onderwerp: Re: [PSUBS-MAILIST]
Shelsol D60 experiment
Hi
Carsten,
Here is a link to the Shellsol D60 pdf.
http://www.scdynamiccontent.shell.com/Files/aliphaticmineralspirits_shellsold60_americas.pdf
It has a cubic expansion coefficient @ 20 degrees C.
To be honest I don't know how to interpret this information,
but possibly you can, If not I'll cook some up.
Alan
----- Original Message -----
From: <MerlinSub@t-online.de>
To: <personal_submersibles@psubs.org>
Sent: Friday, December 24, 2010 9:48 PM
Subject: Re: [PSUBS-MAILIST] Shelsol D60 experiment
Hi Alan, can you do us a favour?
Heat up 100 ml or 200ml of the D60 oil from 20 to 60 or 80 degree in a
jena glass cup with scale and meassure the volume change?
www.chemoline.de/images/d53247ab0ehoheform.jpg
If the Glas cup is high as possible with a small base shall give good measuring
results ever with a lower amount of oil volume.
http://www.orange-sinne.de/uploads/pics/reagenzglas_01.jpg
I try to us the D60 oil maybe in the Euronaut Bowthruster insted of
WD40 which expand - seems a lot.
Also it seems that WD40 vapour at higher degrees and create overpressure..
happy Christmas to all Carsten
<JimToddPsub@aol.com> schrieb:
> Hi Alan,
>
> Now that you mention it I recall the issue with the brushes
lifting. As
> with most areas in life, everything seems to be a trade off. I'll
stay
> tuned to the search for the perfect fluid.
>
> It would be interesting to know the coefficient of thermal expansion
for
> various fluids at the temperatures generated by the motors in our
operating
> environments. It seems there would be several variables:
continuous and
> intermittent run time, cooling effect of the water, etc. Perhaps there
> isn't enough expansion variation from fluid to fluid to even be concerned
with
> it. One can over-think these things.
>
> Thanks,
> Jim
>
>
> In a message dated 12/23/2010 5:59:18 P.M. Central Standard Time,
> alanjames@xtra.co.nz writes:
>
> Hi Jim,
> I started off using a mineral oil in my small DC brushed linear
actuator
> motors.
> This was too viscous & created (as Phil describes it) a "herky
Jerky"
> movement due to it's centrifugal motion
> causing the brushes to lift temporarily. Possibly larger motors would
be
> OK.
> Another option I looked at was WD40 wich is used by Psubbers for
motor
> compensation & is also mainly mineral spirits.
>
> The WD40 can degrade some plastics quickly due to the levels of
aromatics
> & although people have used it successfully in motors,
> my application was primarily for inside linear actuators that have
> electronics, so didn't want to chance it.
> I couldn't track down a silicone with a low enough viscosity &
if I had it
> probably would have cost a fortune.
> The Shelsol D60 was recommended to me by a chemical importer, as it had
a
> low viscosity & was highly refined with a
> low level of aromatics. It also has a higher flash point than WD40.
> Regards Alan
>
>
>
> ----- Original Message -----
> From: _JimToddPsub@aol.com_ (mailto:JimToddPsub@aol.com)
> To: _personal_submersibles@psubs.org_
> (mailto:personal_submersibles@psubs.org)
> Sent: Friday, December 24, 2010 11:31 AM
> Subject: Re: [PSUBS-MAILIST] Shelsol D60 experiment
>
>
> Hi Alan,
>
> Interesting to hear how the various plastics stood up to D60.
Why would
> you use mineral spirits (a solvent) instead of light mineral oil as
a
> compensating fluid?
>
> Jim
>
>
> In a message dated 12/23/2010 2:31:22 P.M. Central Standard Time,
> _alanjames@xtra.co.nz_ (mailto:alanjames@xtra.co.nz)
writes:
>
> Hi,
> A couple of months back I posted that I was experimenting with
Shelsol D60
> for use as a
> compensating fluid for my motors & linear actuators.
> This is a low viscosity, low aromatic mineral spirit.
> _http://www.scdynamiccontent.shell.com/Files/aliphaticmineralspirits_shellso
> ld60_americas.pdf_
> (http://www.scdynamiccontent.shell.com/Files/aliphaticmineralspirits_shellsold60_americas.pdf)
> I left polystyrene, acrylic, & bits & pieces of household
plastic soaking
> in it.
> I just noticed that after 2&1/2 months the polystyrene had
shriveled
> slightly & sunk.
> This was a good result compared with WD40 wich did this to the
polystyrene
> in less than a
> day.
> The Shelsol also caused some of the cheap plastics to become
brittle. The
> Acrylic, acetate
> & some other plastics (not sure what they were) were unchanged.
> I haven't tried running my submarine motors in it. But one of my
very
> small linear actuator motors wich
> had been soaking in it for the same time frame works fine.
> Although the result was great compared with WD40, it's still
degrading
> some plastics & I'll have
> to rethink what I'm doing with my actuators as there are electronics
> inside them that may be affected.
> Alan
>
>
>
>
>
>
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