Ping Pong Balls
 

(William R. Watt) wrote in
:

"Matt/Meribeth Pedersen" ) writes:

... So sorry, it's not enough to make a loud noise, just
the small crackly ones.

any idea how many freeze-thaw cycles those pop bottles can go through
before the plastic creases and splits open? do they get brittle at low
temperatures? just wondering as I don't drink soda pop and boats go
through several freeze-thaw cycles over the winter and spring in this
area. --
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Most Pop bottles are made from PET. Look it up. Degrades quite quickly
under sunlight or temperature changes/cycles. Note that doesn't mean its
biodegradable, just that it gets brittle.

Sure a good condition bottle can hold the effects of pressure change due to
temperature but not as a long term solution. I'd suspect they're probably a
good short term bouyancy solution where you're going to change them
regularly and they're not going to get significantly submerged.

Since a Pop bottle is designed to hold high pressures in it's nothing more
than a slightly ridgid ballon. Not good at holding pressures out - as they
might be required to do if they get submerged. FYI I checked this some time
ago when thinking of using some in my kayak here in FL. A 2 liter pop
bottle at sea leavel pressure crushed before it got to the bottom of my 6'
deep pool and so significantly reducing it's bouyancy.

Ping Pong Balls
 

My guess would be dozens - but it's a guess. You could place an empty
bottle in the freezer each night, and put it out each morning.
There is very low loading. I think you might give up before the bottle
did.

Brian W

On 24 Dec 2003 15:26:41 GMT, (William R.
Watt) wrote:

"Matt/Meribeth Pedersen" ) writes:

... So sorry, it's not enough to make a loud noise, just
the small crackly ones.

any idea how many freeze-thaw cycles those pop bottles can go through
before the plastic creases and splits open? do they get brittle at low
temperatures? just wondering as I don't drink soda pop and boats go
through several freeze-thaw cycles over the winter and spring in this area.

Ping Pong Balls
 

Jeff wrote:

(William R. Watt) wrote in
:

"Matt/Meribeth Pedersen" ) writes:

... So sorry, it's not enough to make a loud noise, just
the small crackly ones.

any idea how many freeze-thaw cycles those pop bottles can go through
before the plastic creases and splits open? do they get brittle at low
temperatures? just wondering as I don't drink soda pop and boats go
through several freeze-thaw cycles over the winter and spring in this
area. --
-----------------------------------------------------------------------
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community network homepage: www.ncf.ca/~ag384/top.htm
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Most Pop bottles are made from PET. Look it up. Degrades quite quickly
under sunlight or temperature changes/cycles. Note that doesn't mean its
biodegradable, just that it gets brittle.

Sure a good condition bottle can hold the effects of pressure change due to
temperature but not as a long term solution. I'd suspect they're probably a
good short term bouyancy solution where you're going to change them
regularly and they're not going to get significantly submerged.

Since a Pop bottle is designed to hold high pressures in it's nothing more
than a slightly ridgid ballon. Not good at holding pressures out - as they
might be required to do if they get submerged. FYI I checked this some time
ago when thinking of using some in my kayak here in FL. A 2 liter pop
bottle at sea leavel pressure crushed before it got to the bottom of my 6'
deep pool and so significantly reducing it's bouyancy.

Now that is definately something to note. When you say "crushed", I take this
to mean that the volume of the bottle was reduced significantly. A flooded boat
needing as much bouyancy as possible, would start to loose buoyancy quickly.

I'm sure that I will fall in line with everyone else and use 2 part but I had
to look into alternatives. Must be that Yankee blood.

--
Tailgunner
http://boat.nbrigham.com

Ping Pong Balls
 

WaIIy wrote:

On Wed, 24 Dec 2003 08:04:12 GMT, "Brian D"
wrote:

If someone was worried about it, but wanted removable flotation, then why
not pour 2-part urethane flotation foam into the plastic pop bottles? Just
trim the ooze, screw on the cap, and I think it would last just about
forever underwater. Needs to be poked through a deck plate and the deck
plate needs to be good enough quality to stay closed under impact.

Brian

Actually, if he put ping pong balls into plastic bottles, he would have
peace of mind.

Been waiting for that. Good one. Don Pardo, tell hm what he's won!

--
Tailgunner

Ping Pong Balls
 

Which reminds me of that epic movie about fishing: "Jaws"

A milk jug makes a handy dandy shark float (they showed)

I think this even works in real life!

Brian W


On Wed, 24 Dec 2003 11:52:11 +0000 (UTC), Chicago Paddling-Fishing
wrote:

Tailgunner wrote:
: Bear with me for a second.

: I have been hearing about people using ping pong balls for floatation.
: However, I can't find anyone who has actually done it.

: It makes sense in that it will allow water to flow and not trap water in
: the bilge. They should last a while and certainly easy to install.

: Anyone have any first hand knowledge of doing this?

There was a magazine article a few years back something to the effect of
"Klepper, the NATO Kayak". In that article they mention using mesh bags
filled with ping-pong balls for floation because it cannot be deflated by
a single shot.

For our scout kayaks, we used plastic milk jugs.

Ping Pong Balls
 

Actually, if he put ping pong balls into plastic bottles, he would have
peace of mind.

Been waiting for that. Good one. Don Pardo, tell hm what he's won!

better still put the ping pong balls in the plastic bottles, fill the
bottles with two part foam, and finish with three coats of exterior grade
latex house paint for UV protection. step-by-step website photos please.
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Ping Pong Balls
 

I believe inserting the ping pong balls into a soft drink bottle would
require briefly shrinking the diameter of the ping pong balls to fit through
the neck of the plastic bottles.
As a previous poster noted, this can be accomplished by taking the ping pong
balls along on a deep sea submersible to a depth of several thousand feet,
which will cause them to compress nicely, fitting through the neck into the
body of the bottle. They would of course expand to normal diameter when you
return to the surface.
Each trip should enable you to compress and insert balls into two or even
three bottles. Several dozen trips should complete this stage of the task.
Foaming, painting and installing the bottles would of course be done on
shore.
The cost of hiring the submersible, mother ship and crew, at perhaps
$100,000 per day, may make the economics of this option somewhat less
attractive than a $10 can of foam from Home Depot.
Unless, of course, you are working under a government contract.

"William R. Watt" wrote in message
...

Actually, if he put ping pong balls into plastic bottles, he would have
peace of mind.

Been waiting for that. Good one. Don Pardo, tell hm what he's won!

better still put the ping pong balls in the plastic bottles, fill the
bottles with two part foam, and finish with three coats of exterior grade
latex house paint for UV protection. step-by-step website photos please.
--
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Ping Pong Balls
 

"Auerbach" lifted the trapdoor, peered around and
wrote:

As a previous poster noted, this can be accomplished by taking the ping pong
balls along on a deep sea submersible to a depth of several thousand feet,
which will cause them to compress nicely, fitting through the neck into the
body of the bottle. They would of course expand to normal diameter when you
return to the surface.

Try to remember NOT to take the bottles down too :)

Ping Pong Balls
 

steveb wrote:

"Auerbach" lifted the trapdoor, peered around and
wrote:

As a previous poster noted, this can be accomplished by taking the ping pong
balls along on a deep sea submersible to a depth of several thousand feet,
which will cause them to compress nicely, fitting through the neck into the
body of the bottle. They would of course expand to normal diameter when you
return to the surface.

Try to remember NOT to take the bottles down too :)

as long as the bottles are open, they would not crush at depth.


--

Even a stopped clock is right twice a day.

Ping Pong Balls
 

"Auerbach" ) writes:

As a previous poster noted, this can be accomplished by taking the ping pong
balls along on a deep sea submersible to a depth of several thousand feet,
which will cause them to compress nicely, fitting through the neck into the
body of the bottle. They would of course expand to normal diameter when you
return to the surface.

I would try heating the plastic bottle first to see if the opening would
expanded sufficiently to admit ping pong balls. If not then I would look
for some other plastic container, say cat litter jugs or peanut butter
jars. Unless of course you are looking for some lame excuse to offer your
wife for renting a deep sea submersible.

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