[PSUBS-MAILIST] rpm

[via Personal_Submersibles]

Right. All 3 of the Nektons had 24 volt until Delta, when they doubled up to 48. Delta's hull is longer, too. I think it weighs 800-900# more than Gamma.


Vance



-----Original Message-----
From: hank pronk via Personal_Submersibles <personal_submersibles at psubs.org>
To: Personal Submersibles General Discussion <personal_submersibles at psubs.org>
Sent: Fri, Aug 29, 2014 4:24 pm
Subject: Re: [PSUBS-MAILIST] rpm


Vance,
Yes for sure, Gamma has two separate amp gauges, one for the motor and one for 
the rest of the sub. All 24v and the trolling motor is 12 v
Hank 
--------------------------------------------
On Fri, 8/29/14, via Personal_Submersibles <personal_submersibles at psubs.org> 
wrote:

 Subject: Re: [PSUBS-MAILIST] rpm
 To: personal_submersibles at psubs.org
 Received: Friday, August 29, 2014, 4:03 PM
 
 Yeah, too
 simple. Maybe that's a good guess, but..... I will say
 that an ammeter in the boat is a good thing. You can keep an
 eye on things, and if it goes UP at some stage, you would
 suspect a thruster issue (a tangle, or a bearing failure or
 whatever). All it takes is an appropriate shunt and a gauge
 (in my pre-digital steampunk mind). Okay, thanks anyway. I
 was curious, that's all.
 Vance
 
 
 
 
 
 
 -----Original
 Message-----
 
 From: hank pronk via Personal_Submersibles
 <personal_submersibles at psubs.org>
 
 To: Personal Submersibles General Discussion
 <personal_submersibles at psubs.org>
 
 Sent: Fri, Aug 29, 2014 3:56 pm
 
 Subject: Re: [PSUBS-MAILIST] rpm
 
 
 
 
 
 
 
 
 
 Vance,
 I did not do an amp draw test because I do not have the
 technology in house. I 
 would guess with a 10% rpm drop, there may be a 10% amp
 increase. That would be 
 to simple :-)
 
 Hank
 --------------------------------------------
 On Fri, 8/29/14, via Personal_Submersibles <personal_submersibles at psubs.org>
 
 wrote:
 
  Subject: Re: [PSUBS-MAILIST] rpm
  To: personal_submersibles at psubs.org
  Received: Friday, August 29, 2014, 3:39 PM
  
  Hank,
  Did you check the amperage? I wonder if the
  resistance causes a higher draw, and if so, how
  much?
  
  Vance
  
  
  
  
  
  
  -----Original
  Message-----
  
  From: hank pronk via Personal_Submersibles
  <personal_submersibles at psubs.org>
  
  To: personal_submersibles
  <personal_submersibles at psubs.org>
  
  Sent: Fri, Aug 29, 2014 3:33 pm
  
  Subject: [PSUBS-MAILIST] rpm
  
  
  
  
  
  
  
  
  
  I am working on a hydraulic
  pump that will be external and pressure compensated 
  in oil.  I am using a trolling motor to drive the pump.  A
  while back there was 
  a question about rpm drop when a trolling motor is filled
  with oil.  I bench 
  tested that today, and the motor runs at 2,000rpm stock and
  1,800 rpm full of 
  WD40.
  Hank
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