[PSUBS-MAILIST] MK101 oil compensation tap

Thu May 21 16:42:40 EDT 2015

Agreed, that is so sexy and built to perfection.
Hank--------------------------------------------
On Thu, 5/21/15, Alan James via Personal_Submersibles <personal_submersibles at psubs.org> wrote:

 Subject: Re: [PSUBS-MAILIST] MK101 oil compensation tap
 To: "Personal Submersibles General Discussion" <personal_submersibles at psubs.org>
 Received: Thursday, May 21, 2015, 4:16 PM

 Just had a
 look at your R300 modifications with the thrusters mounted
 on therear of
 the sub. Looking really good. I think you will  like how it
 performs.http://www.psubs.org/projects/1237684922/mk-101thruster/
 Alan
         From: Cliff Redus via
 Personal_Submersibles
 <personal_submersibles at psubs.org>

 To: Personal
 Submersibles General Discussion
 <personal_submersibles at psubs.org> 
  Sent: Friday, May 22,
 2015 7:25 AM
  Subject: Re:
 [PSUBS-MAILIST] MK101 oil compensation tap

  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 everylast 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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