[PSUBS-MAILIST] gamma upgrades

[Alan via Personal_Submersibles]

Why go for a strong breaking strain if you are just towing a float?
Wouldn't you want something that just suffices in case it snags on
anything?
Alan

Sent from my iPad

> On 13/09/2014, at 7:23 am, via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
> 
> Agreed. The best I've seen for this kind of thing is Spectra 12 from Novabraid--a hollow braided 12 strand rope with breaking strengths comparable to wire rope. The 1/8" diameter rope, for instance, has a breaking strength of 1800 pounds. Anyone who checked the JSL emergency buoy reel will have seen about a half mile of that stuff on a spool between the pilot's sphere and the diving compartment. It is seriously strong, easy to handle, and resistant to virtually everything, apparently (sun, salt water, heat, and so on). Great stuff.
> Vance
> 
> 
> -----Original Message-----
> From: Sean T. Stevenson via Personal_Submersibles <personal_submersibles at psubs.org>
> To: Personal Submersibles General Discussion <personal_submersibles at psubs.org>
> Sent: Fri, Sep 12, 2014 8:10 pm
> Subject: Re: [PSUBS-MAILIST] gamma upgrades
> 
> Be aware that when you start doing deeper dives, a significant portion of your power will be used just to drag that line through the water - particularly if holding position against a current. Don't go larger than necessary. You might want to consider a topsite float and constant tension on the line.
> Sean
> 
> 
>> On September 12, 2014 4:49:39 PM MDT, hank pronk via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>> 
>> 
>> Vance,
>> 
>> I like this rope because it is buoyant so it is always going straight up, also it never sinks into the prop on the surface.  It is not a tether really, it is a tow line for the flag since I don't have a surface boat.
>> 
>> Hank
>> 
>> 
>> On Fri, 9/12/14, Vance Bradley via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>> 
>> 
>> 
>>  Subject: Re: [PSUBS-MAILIST] gamma upgrades
>> 
>>  To: "Personal Submersibles General Discussion" <personal_submersibles at psubs.org>
>> 
>>  Received: Friday, September 12, 2014, 6:40 PM
>> 
>>  
>> 
>>  I don't like nylon
>> 
>>  for a surface tether because it soaks water over time and
>> 
>>  gets negative and heavy. Quarter inch polypropylene is
>> 
>>  neutral and has a 1400# breaking strength. We always used it
>> 
>>  unless there was a lift to do ( like long base acoustic
>> 
>>  transponders with a 300# bottom weight, for instance).
>> 
>>  Vance 
>> 
>>  
>> 
>>  Sent
>> 
>>  from my iPhone
>> 
>>  
>> 
>>>  On Sep
>>  12, 2014, at 6:28 PM, hank pronk via Personal_Submersibles
>> 
>>  <personal_submersibles at psubs.org>
>> 
>>  wrote:
>> 
>>>  
>>> 
>>>  
>>> 
>>>  Vance, 
>>> 
>>>  Great idea, I
>>  am using 1/2 in yellow nylon rope that is buoyant and so far
>> 
>>  it is good but,,, the other day I hit a tree and dragged
>> 
>>  it.  When I was surfacing I noticed the buoy line was going
>> 
>>  down while I was going up.  That is why I attached it to
>> 
>>  the sample bag winch.  Clever yes? lol.
>> 
>>>  Hank
>> 
>> 
>>>  On Fri, 9/12/14, Vance Bradley via
>>  Personal_Submersibles <personal_submersibles at psubs.org>
>> 
>>  wrote:
>> 
>>>  
>>> 
>>>  Subject:
>>  Re: [PSUBS-MAILIST] gamma upgrades
>> 
>>>  To:
>>  "Personal Submersibles General Discussion" <personal_submersibles at psubs.org>
>> 
>>>  Received: Friday, September 12, 2014, 6:23
>>  PM
>> 
>>>  
>>> 
>>>  You can attach
>>  a trawl
>> 
>>>  buoy to your surface line 6-10
>>  feet above the sub to help
>> 
>>>  keep the
>>  line away from your prop.
>> 
>>>  Vance
>>> 
>>>  Sent from my iPhone
>> 
>> 
>>  
>> 
>>>  On Sep 12, 2014, at 6:13 PM, hank
>>  pronk via
>> 
>>>  Personal_Submersibles <personal_submersibles at psubs.org>
>>> 
>>>  wrote:
>>> 
>>>>  
>>>> 
>>>>  Gamma has
>>>  a
>>  modified scrubber that takes cartridges, I moved the fan
>> 
>>>  inside the scrubber housing.  I mounted
>>  removable airtight
>> 
>>>  caps on the intake
>>  and exhaust ports, now I can leave the
>> 
>>  cartridge inside the scrubber all the time.  I just
>> 
>>  remove
>> 
>>>  the caps and turn on the
>>  scrubber.  I also added to my
>> 
>>>  safety
>>  gear, I have a immersion suit in case I have to bail
>> 
>>>  out in freezing water.  My diver below
>>  buoy and flag that I
>> 
>>>  tow behind Gamma
>>  all the time is now detachable from
>> 
>>  inside.
>> 
>>>>  Hank
>> 
>> 
>>>>  Personal_Submersibles mailing list
>>>> 
>>>>  Personal_Submersibles at psubs.org
>>>> 
>>>>  http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
>> 
>> 
>> 
>> 
>>>  Personal_Submersibles mailing list
>>> 
>>>  Personal_Submersibles at psubs.org
>>> 
>>>  http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
>> 
>> 
>>  
>> 
>> 
>> 
>> 
>> 
>>>  Personal_Submersibles mailing list
>>> 
>>>  Personal_Submersibles at psubs.org
>>> 
>>>  http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
>>  
>> 
>> 
>> 
>>  Personal_Submersibles mailing list
>> 
>>  Personal_Submersibles at psubs.org
>> 
>>  http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
>> 
>>  
>> 
>> 
>> 
>> 
>> 
>> Personal_Submersibles mailing list
>> 
>> Personal_Submersibles at psubs.org
>> 
>> http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
> 
> _______________________________________________
> Personal_Submersibles mailing list
> Personal_Submersibles at psubs.org
> http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
> _______________________________________________
> Personal_Submersibles mailing list
> Personal_Submersibles at psubs.org
> http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.whoweb.com/pipermail/personal_submersibles/attachments/20140913/bae72d04/attachment.html>