Re: [Paddlewise] Pumps

Yes, you're right, its 200 gph. I must have been dozing! It actually uses 3
D batteries ... and yes it would be slow. I'm about to outfit a rule pump
with a higher capacity.
Sid
-----Original Message-----
From: Ulli Hoeger <uhoeger_at_is.dal.ca>
To: PaddleWise_at_paddlewise.net <PaddleWise_at_paddlewise.net>
Date: Monday, March 12, 2001 2:30 PM
Subject: Re: [Paddlewise] Pumps


>"Peter Treby" <ptreby_at_ozemail.com.au> wrote
>
>>"Pumps have always been problematic. I have recently purchased
>>a pump that has the batteries inside. Although it bench-tests well,
>>the ocean environment will be the true test. It uses 3 D batteries
>>and pumps 200 gpm with a 4 foot head and may be purchased
>>from West Marine. "
>
>200 GPM ?!  That thing will suck you right out the cockpit with all
>the water. ;)
>More likely 200 GPH.  How long did the 2 D cells last in your
>bench test?  200 gph gives less than 3.5 gpm, not to impressive!
>
>Last season I fed my Rule 500 gph pump with 8 AA cells (to get
>the 12V).  They lasted for several runs were the cockpit was full
>with water up to the coaming with nobody sitting in it ~5 minutes
>each time.  During weekly rescue drills on the lake for 3 month I
>burned 1 set of batteries.  In this situation, with me back in the
>rightened boat and the amount of water getting in during reentry
>and roll or similar situations, it took less than 2 minutes to get the
>water out. No problem to switch the pump on before getting back
>in, but shutting it down after spraydeck back on and water out was
>a pain in the neck with the switch under the rear coaming, espcl.
>when working and concentrating on preventing another capsize.
>Right now I am working on a sensor switch (bench tests work).  Its
>a little circuit with a relais, two transistors, and two sensor
>electrodes.  The switch I use has 3 positions, 1)OFF, 2) ON with
>sensor (pump only works if water is above a crtain level in the
>bottom of the boat), 3) ON pump runs as long as switch is in this
>position and batteries last.   Personally I see advantages compared
>with a common float switch. Time will tell.
>
>Cheers
>
>Ulli
>
>
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