[PSUBS-MAILIST] I am not a dork

Thu Jan 23 19:54:12 EST 2014

Hank,
I was under the impression that pneumatics loose their punch with depth and that is why people usually go with hydraulics? 

Rick

From: hank pronk 
Sent: Thursday, January 23, 2014 2:43 PM
To: Personal Submersibles General Discussion 
Subject: Re: [PSUBS-MAILIST] I am not a dork

Rick,
The cylinders are pneumatic but you can use hydraulic if they use an o-ring for the shaft seal.  
Hank  

On Thursday, January 23, 2014 5:36:58 PM, Land N Sea <landnsea1 at hawaiiantel.net> wrote:

Hank,

Do you have any data on the rams that you have and they are hydraulic and not pneumatic correct?

Rick

From: hank pronk 
Sent: Thursday, January 23, 2014 2:12 PM
To: Personal Submersibles General Discussion 
Subject: Re: [PSUBS-MAILIST] I am not a dork

Rick,
The nice thing about a manipulator for a sub is, you want it to be slow and slow is cheap.  Go with big cylinders and a small pump with a restrictor.  It will be so easy to operate it you won't believe it.
Hank

On Thursday, January 23, 2014 4:57:21 PM, Land N Sea <landnsea1 at hawaiiantel.net> wrote:

Most of what I plan to use the arm for is for gathering all the gold doubloons that fell out of Captain Cooks pockets while he was here in Kealakekua bay wind surfing, but I would settle for an old bottle or two off his ship if I had to. I was more wondering if I came across an abandoned small anchor or something else that weighed around 50 Lb.'s or so if it would up end the boat much? I would rather not use the forward MBT to keep the trim because of having to dump air at the proper rate while ascending. Tagging it with a line and letting the guys in the support boat lift it also sounds good but I would have to master the manip technique. 

Rick

From: Vance Bradley 
Sent: Thursday, January 23, 2014 11:20 AM
To: Personal Submersibles General Discussion 
Subject: Re: [PSUBS-MAILIST] I am not a dork

Manips are for manipulating, not lifting. Most light arms can do 50-60#. for lifting you could hook on a (releasable) cables and lift with the MBTs. Better yet, take a line down to attach and let your surface crew haul away, or do what we fit at HBOI and in the North Sea. Take a lift bag down rolled into a PVC tube with a blow and go hose from your air banks. Hook up, back away to deploy the bag, inflate and run away (to get out from under the load)
Vance

Sent from my iPhone

On Jan 23, 2014, at 2:27 PM, "Land N Sea" <landnsea1 at hawaiiantel.net> wrote:

  I am planning on fabricating my own manipulator for my K-350 that will be hydraulic and was wondering if anybody that had experience using one on a boat that size would be able to let me know about how much an arm would be able to pick fully extended and if a VBT up forward was mandatory to keep the trim.
  I am planning on making the manipulator out of two sections, each about 2’ long giving me a 4’ reach fully extended which will get me out just past my forward MBT. 
  I realize that the lifting capacity is based on a number of things like the rated capacity of the rams and where they are attached to the arms so if you know that as well that would be great. It’s freezing here on the big Island! I woke up to a chilling 54 degrees and had to put on a sweat shirt just to walk up to my shop.<wlEmoticon-sadsmile[1].png>

  Rick 

  From: hank pronk 
  Sent: Wednesday, January 22, 2014 1:43 PM
  To: Personal Submersibles General Discussion 
  Subject: Re: [PSUBS-MAILIST] I am not a dork

  Alan,
  Yes I could spring load it, It does take some effort to pull the fingers open.  The oil has to travel through a pretty small line and all I have here is a pail of 5/30 and that is a bit heavy.  I don't heat my shop at night so it gets chilly by morning.
  Hank

  On Wednesday, January 22, 2014 4:34:35 PM, Alan James <alanlindsayjames at yahoo.com> wrote:

  Hank,
  can you mount a wedge somewhere so you can push the manipulator grippers up against
  it to wedge them open? Or have a compression spring temporarily mounted across the grippers?
     You could hang some plastic fish from the garage roof  to add a bit of realism.
  Alan

  From: "vbra676539 at aol.com" <vbra676539 at aol.com>
  To: personal_submersibles at psubs.org 
  Sent: Thursday, January 23, 2014 11:09 AM
  Subject: Re: [PSUBS-MAILIST] I am not a dork

  Hey, she's a banker. It's all black or white with them. Except for the ones with mad manibubators in the shop out back, one supposes.

  -----Original Message-----
  From: hank pronk <hanker_20032000 at yahoo.ca>
  To: Personal Submersibles General Discussion <personal_submersibles at psubs.org>
  Sent: Wed, Jan 22, 2014 4:37 pm
  Subject: Re: [PSUBS-MAILIST] I am not a dork

  The only problem is, Gamma's manipulator has a power only to close gripper.  The gripper opens with outside water pressure pushing against it.  So I have to jump out of the sub to open the gripper each time.  I was trying to explain this to my wife and she replied "can't you just put it in a pail of water"  I am still laughing inside of coarse :-)
  Hank

  On Wednesday, January 22, 2014 2:03:46 PM, Michael Holt <mholt at ohiohills.com> wrote:

  On 1/22/2014 2:57 PM, Alec Smyth wrote:
  > That is indeed a very necessary practice, but for it to work properly 
  > you also have to make loud "AOUUUUUGAH" klaxon sounds every so often, 
  > to indicate diving and surfacing!
  You're right: you gotta have the right sounds.  I have a friend who used 
  to sit in the incomplete fuselage of his biplane in his garage, making 
  airplane-engine noises.

  M

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