A frightened man with a bucket will beat any electric pump hands
down.

Now that's funny!

I believe I recall reading a test of pumps in a British sailing mag
(PBO?) where this was disproved. Not even close in fact, compared to a
good pump.

Brian Whatcott wrote:

On 6 Sep 2006 19:47:07 -0700, "Bob" wrote:



but dont I get points for the 2" trash pump for the time when I
actually need a pump?? Or maybe place a salvors lien on somebodies
boat?

Been Schooled
Bob


Very, very manly, I'd say. (I even caught myself thinking along those
lines at a [ gasp! ] Harbor Freight store where they were showing a
semi-trash pump that looked pretty mean) :-)

Brian Whatcott Altus OK

How about upwards of 900 gpm (yes I do mean over 50000 gph)?

http://www.pump-zone.com/article.php?id=223

Its engine driven and clamps round your prop shaft, acting as a bilge
blower (or rather sucker) untill the water gets up to its intake :-)


--
Ian Malcolm. London, ENGLAND. (NEWSGROUP REPLY PREFERRED)
ianm[at]the[dash]malcolms[dot]freeserve[dot]co[dot]uk
[at]=@, [dash]=- & [dot]=. *Warning* HTML & 32K emails -- NUL:
'Stingo' Albacore #1554 - 15' Early 60's, Uffa Fox designed,
All varnished hot moulded wooden racing dinghy.

"Ian Malcolm" wrote
Brian Whatcott Altus OK

How about upwards of 900 gpm (yes I do mean over 50000 gph)?

http://www.pump-zone.com/article.php?id=223

Its engine driven and clamps round your prop shaft, acting as a
bilge blower (or rather sucker) untill the water gets up to its
intake :-)


This has got to be right at the top of my "Damn, I wish I'd thought of
that - ten coolest boat equipment ideas" for the last few years.

I wish I had more than 7/8" between my coupling and my stuffing box

--

Roger Long

Hi Ian,

I've been looking for something exactly like the
pump in your post. In an emergency, it seems
silly to have a 27HP diesel motor with 70+ gallons
of fuel sitting by doing nothing while the boat
sinks.

Of course, its going to take a little more than
the average bilge pump hose and through hole to
handle that sucker when it starts pumping.
Something like the 2" diameter hose that handles
my engine exhaust.

Before seeing that article, I'd considered slaving
a hydraulic pump to the front of the diesel, and
powering a trash pump with a hydraulic motor. Of
course, the hydraulic pump does give you some more
options as well, such as powering a scuba
compressor, or 110V AC generator with hydraulic
motors as well as powering an emergency pump.
I'll have to think about that some more.

Don W.

Ian Malcolm wrote:

How about upwards of 900 gpm (yes I do mean over 50000 gph)?

http://www.pump-zone.com/article.php?id=223

Its engine driven and clamps round your prop shaft, acting as a bilge
blower (or rather sucker) untill the water gets up to its intake :-)

Its engine driven and clamps round your prop shaft, acting as a bilge
blower (or rather sucker) untill the water gets up to its intake :-)

If you're really screwed then shut off the seacock and cut the raw water
intake hose to the engine. Use that to pull water from the bilge, through
the engine and out the exhaust manifold.

Then a little bit of something floating around in the bilge goes into
you pump impeller and you have an unpowered sinking boat instead of a
powered sinking one. Great.

Besides, a raw water pump doesn't have a fraction the capacity of this
rig.

--

Roger Long



"Bill Kearney" wrote in message
t...
Its engine driven and clamps round your prop shaft, acting as a
bilge
blower (or rather sucker) untill the water gets up to its intake
:-)

If you're really screwed then shut off the seacock and cut the raw
water
intake hose to the engine. Use that to pull water from the bilge,
through
the engine and out the exhaust manifold.

On Fri, 08 Sep 2006 10:39:26 +0100, Ian Malcolm
wrote:

Brian Whatcott wrote:

On 6 Sep 2006 19:47:07 -0700, "Bob" wrote:



but dont I get points for the 2" trash pump for the time when I
actually need a pump?? Or maybe place a salvors lien on somebodies
boat?

Been Schooled
Bob


Very, very manly, I'd say. (I even caught myself thinking along those
lines at a [ gasp! ] Harbor Freight store where they were showing a
semi-trash pump that looked pretty mean) :-)

Brian Whatcott Altus OK

How about upwards of 900 gpm (yes I do mean over 50000 gph)?

http://www.pump-zone.com/article.php?id=223

Its engine driven and clamps round your prop shaft, acting as a bilge
blower (or rather sucker) untill the water gets up to its intake :-)

Oh yes! Reminds me of that scrap yard builders series on TV:
the objective was to build a fire boat capable of dousing a flaming
building on the far side of a lake.
One team decided to use water jet propulsion as well as for dousing
the flames. They started with a brake drum, and welded on three vanes
for the impeller, and cased it to a hose.
Centrifugal impellors can take plenty of abuse, and absorb lots of
power.

Brian Whatcott Altus OK

Brian Whatcott wrote in
:

Centrifugal impellors can take plenty of abuse, and absorb lots of
power.


One of my friends likes to bid on government surplus junk.

One of the surplus flyers he gets had a "portable fire pump" in nearly
new, operable condition for bid. He didn't bother with the fine print,
thinking it was a "Handy Billy" or one of the Navy's sailor-carried
portable pumps that might be handy around the place.

They called him from the Supply Center and asked him to come pick up his
pump. So, he took his truck down and nearly couldn't bring it home! It
was a portable pump, allright. With a 4-wheel trailer! There was a 8V92
Detroit Diesel Two-stroker hooked to this gawd-awful-big pump that fed a
firehose manifold with EIGHT outlets of various sizes. It also came with
4 firehoses and a huge suction hose with big screen filter on the bottom
to throw into the lake. It even had diesel fuel in the tank and had just
been serviced.

We took it to the lake boat landing just to see if it worked.....(c;

His whole neighborhood could be in flames and he'd have it put out in
just a couple of minutes....(c;

He paid $800. The next bidder bid $400 and that was all. Some fire
department in Ohio called him to ask if he'd sell it to them for $5000.
After a bit of dickering, he got $8K for it....not bad for one trip to
the base.

Make a helluva bilge pump....or JET DRIVE!



--
There's amazing intelligence in the Universe.
You can tell because none of them ever called Earth.

Then a little bit of something floating around in the bilge goes into
you pump impeller and you have an unpowered sinking boat instead of a
powered sinking one. Great.

If you're screwed, you're screwed. Powered or not.

Besides, a raw water pump doesn't have a fraction the capacity of this
rig.

No argument there. But then nor does it have the constant horsepower drain
that pump incurs.

"Bill Kearney" wrote

If you're screwed, you're screwed. Powered or not.


Not at all (speaking as a long time researcher of marine accidents,
currently, the Titanic).

Running aground to avoid sinking and buy time to control flooding is a
time honored technique that has saved many vessels.

When a vessel becomes severely flooded, loss of stability and capsize
become a primary danger. The ability to control attitude in seas to
diminish the probability of capsize can be a life or death issue.

No argument there. But then nor does it have the constant
horsepower drain
that pump incurs.

The beauty of that system is the very low horsepower drain. When
functioning as a blower, the loss would be insignificant. It isn't
going to be a very effective blower at shaft rpm speeds but it should
keep a constant, very low, flow going.


--

Roger Long