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Bilge pump.

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Riv View Drop Down
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Post Options Post Options   Quote Riv Quote  Post ReplyReply Direct Link To This Post Posted: 25 Feb 18 at 8:48pm
I like the idea of using a drill and pump, wouldn't weigh much.

I've got a single action lift pump on the club wayfarer, tends to get blocked easily by leaves so pump would need a good strum box 
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JohnJack View Drop Down
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Post Options Post Options   Quote JohnJack Quote  Post ReplyReply Direct Link To This Post Posted: 26 Feb 18 at 8:56am
I second (or third, or fourth) angry crew with a bailer or bucket can shift way more water than any bilge pump ever will, its not like there isn't much room in a GP (under the stern deck). As long as it is tied to something where it cant move around and get under you feet it should be fine.

Another option is more bigger air ags.
Our old GP, we had to big pillow bags under the stern deck and had bigger bags under the seats (it had a bow bulkhead). The problem with a GP (Ents are the same) when full swamped they tend to sit very low at the stern, sometime with the transom submerged (which obviously doesn't aid bailing). You will often have water pouring in through the centreboard case at this point to. The extra air bags at the stern counters this by making the back of the oat more buoyant. You also bring up less water when you recover.   
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423zero View Drop Down
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Post Options Post Options   Quote 423zero Quote  Post ReplyReply Direct Link To This Post Posted: 26 Feb 18 at 1:26pm
This huge builders bucket got all the hallmarks of a decent variety show.
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Presuming Ed View Drop Down
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Post Options Post Options   Quote Presuming Ed Quote  Post ReplyReply Direct Link To This Post Posted: 26 Feb 18 at 6:20pm
Ballpark: taking a cockpit of 3m x 1m x 0.3m deep gives 900kg of water. Whale's largest bilge pump can move 189 L/min, so that's nearly 5 minutes to empty the cockpit. Water is heavy stuff.

While it's doing that, it's drawing 18A at 12V. So that's 18AHrs. A large power tool battery is 3Ahr, so you would probably need at least 7, what with pulling all that current. And that means that your batteries are dead and can't pump any more. And that current is against zero head. Actually pumping the water up and out would pull more.

A lead acid battery of nominal 85AH capacity - so about 40ish available, unless you want to kill it - would give you 2 and a bit capsizes worth of pump time. But that battery weighs 25kg. And you're still pumping for 5 mins a time.

Electric bilge pumps are bad for large amounts of water. If you want to move the water fast, you want a petrol powered trash pump. Honda's smallest will pump 710 lt/min. Weighs 47kg dry, though...

Better to stick with a bailer/bucket, I think.


Edited by Presuming Ed - 26 Feb 18 at 6:41pm
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423zero View Drop Down
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Post Options Post Options   Quote 423zero Quote  Post ReplyReply Direct Link To This Post Posted: 26 Feb 18 at 7:00pm
I suppose you could have a wind driven one running all the time, mind could be dangerous if you fell on it, no, stick with a bailer and a bilge pump to get the last dregs.
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Rupert View Drop Down
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Post Options Post Options   Quote Rupert Quote  Post ReplyReply Direct Link To This Post Posted: 26 Feb 18 at 7:39pm
In the firefly, we have 2x 2 gallon buckets, a bailer and a sponge. Does the job.
Firefly 2324, Lightning 130, Puffin 229, Topper 44496, Minisail 3131, Minisail 3446
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423zero View Drop Down
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Post Options Post Options   Quote 423zero Quote  Post ReplyReply Direct Link To This Post Posted: 26 Feb 18 at 8:31pm
where do you put buckets ?
Had some brilliant days sailing in a Firefly, can't say I noticed similar issues with Firefly that you get with Enterprise and GP14.
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ColPrice2002 View Drop Down
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Post Options Post Options   Quote ColPrice2002 Quote  Post ReplyReply Direct Link To This Post Posted: 26 Feb 18 at 9:47pm
In the firefly I used to keep the bucket between the mast and the bow bag.
Remember that this was back when the mast was keel stepped, rotated, and kept the 450lb buoyancy bag in place.
The bucket was useful to keep the hand bailer, sponge and sweater as well.

The firefly would recover from a capsize full of water (above the centreboard case top). By moving to the stern, the bow bag could lift the bow and help the water drain to the stern. The sidedecks would be awash, so getting large quantities of water out of the hull was a priority...


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mozzy View Drop Down
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Post Options Post Options   Quote mozzy Quote  Post ReplyReply Direct Link To This Post Posted: 26 Feb 18 at 10:08pm
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423zero View Drop Down
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Post Options Post Options   Quote 423zero Quote  Post ReplyReply Direct Link To This Post Posted: 27 Feb 18 at 7:12am
Nice one , going to get one of these,
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