[PSUBS-MAILIST] I am not a dork

hank pronk hanker_20032000 at yahoo.ca
Thu Jan 23 20:29:54 EST 2014 

Rick,
The pneumatic cylinders are air cylinders that work off air pressure.  They are mostly aluminum so won't rust and are light weight.  Also they have a smaller dia rod and that helps to reduce hyd pressure to actuate at depth.
Hank



On Thursday, January 23, 2014 6:15:41 PM, Land N Sea <landnsea1 at hawaiiantel.net> wrote:
  
Yes air, when I hear pneumatic, I think air as I have used both in the 
commercial diving industry and hydraulics were the best way to go for use at any 
depth. How does the word pneumatic get attached to a hydraulic ram?  

Rick 


From: hank pronk  
Sent: Thursday, January 23, 2014 3:03 PM 
To: Personal Submersibles General 
Discussion  
Subject: Re: [PSUBS-MAILIST] I am not a dork 
 
Rick,  
When you say pneumatics loose there punch, are you thinking that they 
use air pressure?  You use pneumatic cylinders with hydraulic oil as if 
they were hydraulic cylinders.  Maybe we have our wires crossed 
here. 
Hank 



On , hank pronk 
<hanker_20032000 at yahoo.ca> wrote:
 
Rick, 
Trust me, pneumatics are what Gamma has and it is the way to 
go. 
Hank 



On Thursday, January 23, 2014 5:54:41 PM, 
Land N Sea <landnsea1 at hawaiiantel.net> wrote:
 
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
>
>---
>This email is free from viruses and malware because avast! 
  Antivirus protection is active.
>http://www.avast.com/ 
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