[PSUBS-MAILIST] syntactic foam.

Fri Jun 23 19:55:29 EDT 2017

Alan, Don't make me go SJW on you.
--------------------------------------------
On Fri, 6/23/17, Alan via Personal_Submersibles <personal_submersibles at psubs.org> wrote:

 Subject: Re: [PSUBS-MAILIST] syntactic foam.
 To: "Personal Submersibles General Discussion" <personal_submersibles at psubs.org>
 Date: Friday, June 23, 2017, 4:52 PM

 Hank,is that extra virgin or
 cold pressed? I wonder if it compressesunder
 pressure.Olive oil would be an
 expensive way to go. Whereas petrol costsnothing if you re-use
 it. Not
 sure why you fear gasoline; they let women pump it in to
 their cars
 at gas stations!Cheers Alan
 Sent
 from my iPad
 On
 24/06/2017, at 4:21 AM, hank pronk via Personal_Submersibles
 <personal_submersibles at psubs.org>
 wrote:

 Alec,Thank
 you, I should have bought those instead of the 11 inch,
 grrrr.  I could go with those floats, but I do hope to
 build the next generation  Elementary sub.  I want to
 figure out the whole foam thing and possibly carry it over
 to the next sub.  Alan has really intrigued me with using
 gasoline, I am terrified of that idea but it has caused me
 to stumble onto another liquid.  In searching I have
 discovered that Olive Oil is even lighter
 than gasoline, and obviously safer for me and the
 environment.  I have no idea yet if it is an option, I only
 stumbled onto it this morning.   If anyone knows of a bad
 reason to use Olive Oil, please let me know.  Olive Oil is
 .703 g\cc and I can put it into plastic containers that
 are .93 g\cc Hank

     On Friday, June 23,
 2017 9:28 AM, Alec Smyth via Personal_Submersibles <personal_submersibles at psubs.org>
 wrote:

  Actually there are
 trawl floats rated to 1800m. That should have you covered
 Hank! Check out #629 below.
 http://trawlworks.com/floats.html

 Best,

 Alec
 On Mon, Jun 19, 2017 at
 1:21 PM, Brian Cox via Personal_Submersibles <personal_submersibles at psubs.org>
 wrote:
 These guys have 14"
 spherical buoys rated to 800 meters   - $120.00    with
 a positive buoyancy of 39 #    they are not syntactic. 
 The syntactics start at 30" in dia

 http://www.mooringsystems.com/
 buoyancy.htm   Brian 
 --- personal_submersibles at psubs.
 org wrote:

 From: james
 cottrell via Personal_Submersibles <personal_submersibles at psubs.
 org>
 To:
 Personal Submersibles General Discussion <personal_submersibles at psubs.
 org>
 Subject: Re: [PSUBS-MAILIST] syntactic
 foam.
 Date: Mon, 19 Jun 2017 16:52:56
 +0000 (UTC)

 Deep
 sea glass floats are rated for 10,000
 psi
 http://teledynebenthos.com/
 product/flotation_instrument_ housings/flotation-glass-
 spheres

 Greg

 From: Alan via
 Personal_Submersibles <personal_submersibles at psubs.
 org>
  To: Personal
 Submersibles General Discussion <personal_submersibles at psubs.
 org> 
  Sent: Monday, June 12,
 2017 6:18 PM
  Subject: Re:
 [PSUBS-MAILIST] syntactic foam.

 Hank,if you
 are getting 3lb of floatation per gallon then you need
 184gallons of gas. 184 x 3 = 552 ( near
 enough).Cheers Alan

 Sent from my iPad
 On 13/06/2017, at 9:50 AM, hank pronk via
 Personal_Submersibles <personal_submersibles at psubs.
 org> wrote:

 Alan,I need 550 lbs flotation  and one imp
 gallon of water is 10 lbs and gas is 7 lbs that gives me 3
 lbs buoyancy per imp gallon that means I need 1650 gallons
 of gas.Hank

     On Monday, June 12,
 2017 3:43 PM, Alan via Personal_Submersibles <personal_submersibles at psubs.
 org> wrote:

 Hank,are you sure that's
 right!That would give 1900kg of floatation (
 nearly 2 ton)That is based on gasoline being .71
 of the weight of water. So every litreof gas
 gives you about 290 grams of floatation. Metric
 system is much easier for calculating these
 things.Cheers Alan

 Sent from my iPad
 On 12/06/2017, at 11:42 PM, hank pronk via
 Personal_Submersibles <personal_submersibles at psubs.
 org> wrote:

 Alan,Those
 are nice, I can see other uses for them.  If I use
 gasoline, I would need about  1,750 imperial gallons for
 Elementary.    I was mistaken about the  liquid paraffin,
 gasoline is better. 

     On Sunday, June 11,
 2017 11:36 PM, Alan via Personal_Submersibles <personal_submersibles at psubs.
 org> wrote:

  Maybe
 something like this collapsable plastic fuel
 tank, inside a protective fibreglass housing, or
 a grate arrangement.  https://www.bdoutdoors.com/
 atl-fuel-bladder-extra/Alan
 Sent from my iPad
 On 12/06/2017, at 12:28 PM, hank pronk via
 Personal_Submersibles <personal_submersibles at psubs.
 org> wrote:

 Alan,Yes
 I have, it is very simple and effective.  There are of
 coarse some hazardous logistical problems not to
 mention environmental concerns.  I would opt for
 diesel fuel to reduce the fire hazard.  Any time you have
 plastic and gas it is dangerous.  Last week I did a barge
 job replacing dock piles.  When I walked up and down the
 plastic dock floats, every time I touched the steel piles I
 got a spark.  Actually Liquid paraffin is even better at
 .8g\ccHank 

     On Sunday, June 11,
 2017 5:32 PM, Alan via Personal_Submersibles <personal_submersibles at psubs.
 org> wrote:

 Hank,have you looked at using
 gasoline?More volume required for the same
 floatation as syntactic foam,but apart from the
 holding tanks it would cost you nothing, as
 youcould use it after the dive. If you designed
 right you could fill the tanksat your
 destination.Alan

 Sent from my iPad
 On 12/06/2017, at 6:03 AM, hank pronk via
 Personal_Submersibles <personal_submersibles at psubs.
 org> wrote:

 Greg,that sounds good, I would love to find a more cost
 effective foam.  I still want to build one more sub that
 goes much deeper, but the foam cost is not manageable.  I
 estimate I can build a  Titanic capable sub  for 100,000
 and 80,000 of that is foam.  ;-(Hank

     On Sunday, June 11,
 2017 8:29 AM, hank pronk via Personal_Submersibles <personal_submersibles at psubs.
 org> wrote:

  Greg,There has to be good reason to make foam by
 other means than standard practices.   Cost would be the
 biggest reason, and using wax will probably work, but is
 there a saving?  Using wax means you have to use a
 deeper rated sphere to offset the loss of reinforcement
 provided by the resin.  I have no idea what the cost
 difference would be.  Maybe the cost is still much
 better.  When I look at Cliff's report, the resin is
 not the expensive part.  Perhaps the direction should be,
 to look for a replacement for the spheres.  In Cliff's
 report it shows the resin triples the sphere's
 performance.  That implies that the true strength comes
 from the resin.  Maybe a sawdust resin or a styrofoam
 granule resin is worth looking at also.  Maybe it is a
 simple as air entrained resin?Fun to
 think about anyways.Hank 

     On Sunday, June 11,
 2017 6:22 AM, hank pronk via Personal_Submersibles <personal_submersibles at psubs.
 org> wrote:

  Hi
 Scott,Thanks for the offer, but I
 need foam for 3,000
 feet.Hank 

     On Saturday, June 10,
 2017 9:03 PM, Scott Waters via Personal_Submersibles <personal_submersibles at psubs.
 org> wrote:

 Hank,
 Hola from Costa Rica!
 Depends on if they are glass or
 carbon fiber spheres and what size they are. They are all
 pretty durable. We are actually cutting up the foam on
 Pisces and reattaching it to get the shapes we
 want. 
 I do have a
 ton of syntactic foam that is cert to 400m that I'd sell
 you for super cheap. Like all of it for $200
 Thanks,Scott
 Waters

 Sent from my U.S.
 Cellular® Smartphone
 --------
 Original message --------From: hank pronk via
 Personal_Submersibles <personal_submersibles at psubs.
 org> Date: 6/10/17  12:38 PM  (GMT-06:00)
 To: Personal Submersibles General Discussion
 <personal_submersibles at psubs.
 org> Subject: [PSUBS-MAILIST] syntactic
 foam. 
 I
 have an idea, but not sure if it will work.  My idea is to
 fill a neutrally buoyant container with macro and micro
 spheres.  After the container is as full as possible, then
 fill with an environmentally friendly oil.  This would be
 more buoyant than using a resin and less complicated and
 cheaper.  My concern is, how well will the spheres stand up
 against breaking from being in contact with the other
 spheres and the container.   Are these spheres delicate?
  Hank______________________________
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