[PSUBS-MAILIST] MK101 oil compensation tap

Thu May 21 18:09:01 EDT 2015

Thanks Cliff,
Rick

On Thu, May 21, 2015 at 9:25 AM, Cliff Redus via Personal_Submersibles <
personal_submersibles at psubs.org> wrote:

>  Rick, I am not a machinist as well.  I have a friend who is and owns his
> own machine shop.  I outsourced all the machined parts to him.  I don't
> remember the total cost but there was some setup and learning curve on the
> first of these.  I asked him what he thought  it would cost to
> machine future versions ;hub(1), stand offs(3), kort nozzle(1) and
> adapter(1) for Subconn electrical penetrator).  He thought he could do the
> 6 parts for $1500 each.   This is still a bit pricey but better than OTS
> thrusters.  The problem with this kind of stuff is there is not enough
> volume to drive a lot of cost out by going to castings.
>
> Cliff
>
>
>
>  ------------------------------
>  *From:* Rick Patton via Personal_Submersibles <
> personal_submersibles at psubs.org>
> *To:* Personal Submersibles General Discussion <
> personal_submersibles at psubs.org>
> *Sent:* Thursday, May 21, 2015 12:34 PM
>
> *Subject:* Re: [PSUBS-MAILIST] MK101 oil compensation tap
>
> Thanks Cliff,
> I was very impressed on how well you documented the process as it sure
> helps us all.
> Did you machine the SS part that screws into the lower end of the 101
> yourself or did you have a machine shop do it?  If you outsourced it, do
> you remember how pricey it was? I like the the concept but don't have the
> capability of doing it myself unfortunately.
> Rick
>
> On Thu, May 21, 2015 at 3:26 AM, Cliff Redus via Personal_Submersibles <
> personal_submersibles at psubs.org> wrote:
>
>
>
> Rick, I updated the MK101 thruster project at the Psub.org web site to
> show the assembled thrusters installed on the boat
> http://www.psubs.org/projects/1237684922/mk-101thruster/ . The next time
> I pull the thrusters off, I will add a picture of the fully assembled
> thruster alone.  I have not added oil yet.  This is a dry fit only.  I am
> leaning towards doing what Alec did with his idea to add the SS set screw
> to the apex of the caps for fillings and to remove air.  This is a great
> idea.
>
> Cliff
>
>
>
>   ------------------------------
>  *From:* Rick Patton via Personal_Submersibles <
> personal_submersibles at psubs.org>
> *To:* Personal Submersibles General Discussion <
> personal_submersibles at psubs.org>
> *Sent:* Wednesday, May 20, 2015 9:56 PM
>
> *Subject:* Re: [PSUBS-MAILIST] MK101 oil compensation tap
>
> Any pictures Cliff?
> Rick
>
> On Wed, May 20, 2015 at 1:07 PM, Cliff Redus via Personal_Submersibles <
> personal_submersibles at psubs.org> wrote:
>
>
>
>  Small Tygon flexible tube filled with oil.  No holes in housing.  On the
> SS part that screws into the side of the housing, I have a 1/4" tubing with
> Swagelok compression fitting.  I will connect to this port.
>
> Cliff
>
>
>
>
>
> Cliff Redus
> Redus Engineering
> USA mobile:  830-931-1280
> cliffordredus at sbcglobal.com
>
>   ------------------------------
>  *From:* Alan James via Personal_Submersibles <
> personal_submersibles at psubs.org>
> *To:* Personal Submersibles General Discussion <
> personal_submersibles at psubs.org>
> *Sent:* Wednesday, May 20, 2015 4:17 PM
> *Subject:* Re: [PSUBS-MAILIST] MK101 oil compensation tap
>
> Cliff,
> how are you compensating for oil expansion due to heat with the KISS
> method.
> Are you just drilling holes in the housing & using tube?
> Alan
>
>
>
> ------------------------------
>  *From:* Clifford Redus via Personal_Submersibles <
> personal_submersibles at psubs.org>
> *To:* Personal Submersibles General Discussion <
> personal_submersibles at psubs.org>
> *Sent:* Thursday, May 21, 2015 8:43 AM
> *Subject:* Re: [PSUBS-MAILIST] MK101 oil compensation tap
>
> Actually in the spirit of KISS, I am going to start out using oil pressure
> compensation.  If I run into any issues, I will look at using the air or
> this hybrid of oil and air with a regulator.
>
>
> Cliff Redus
>
>
>
> On May 20, 2015, at 2:30 PM, Alan James via Personal_Submersibles <
> personal_submersibles at psubs.org> wrote:
>
> Jon,
> the alternative is to follow Hugh's idea that Cliff is using & I am going
> to test out,
> & put a regulator in the system that is set it to around 4psi internal
> overpressure.
> This means you can fill with oil & not worry about getting every
> last drop going in, or drilling the housing. You will also be able to run
> it air compensated.
> There is the safety feature that if you leak oil there is plenty of air to
> replace it.
> Cliff already has the parts sorted, just put your order in:)
> Alan
>
>   ------------------------------
>  *From:* Jon Wallace via Personal_Submersibles <
> personal_submersibles at psubs.org>
> *To:* Personal Submersibles General Discussion <
> personal_submersibles at psubs.org>
> *Sent:* Thursday, May 21, 2015 5:47 AM
> *Subject:* Re: [PSUBS-MAILIST] MK101 oil compensation tap
>
>
> How important is it to get every last air bubble out?  Surely a fraction
> of the total volume is not going to result in catastrophic failure of
> the motor housing, is it?
>
>
>
>
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