- - - - - - - - - - - - - - - - - - - - - - - - - - -
West Wight Potter Mailing List maintainer
dfarrell@ridgecrest.ca.us
List hosted by www.tscnet.com
- - - - - - - - - - - - - - - - - - - - - - - - - - -
Eric:
I've run into the same considerations for my Potter. If you put the
discharge point above the waterline, wouldn't installing the bilge pump
higher up in the boat reduce the head it has to overcome? :)
Jim Nolan
>From: "Eric Johnson" <etj@nwlink.com>
>Reply-To: etj@nwlink.com
>To: Rye Gewalt <ryeg@vais.net>, etj@nwlink.com, Potter List
><wwpotter@tscnet.com>
>Subject: Re: Hemophilia / Bilge pump discharge
>Date: Thu, 9 Mar 2000 14:57:06 +0800
>
>- - - - - - - - - - - - - - - - - - - - - - - - - - -
> West Wight Potter Mailing List maintainer
> dfarrell@ridgecrest.ca.us
> List hosted by www.tscnet.com
>- - - - - - - - - - - - - - - - - - - - - - - - - - -
> >Eric:
> >
> >Put a big inverted "U" in the line inside the boat and then you can place
>the
>
> >discharge lower on the hull. That way the syphon action of the U will
>overcome
>the
> >head pressure while still protecting the boat from ingressing water when
>not
>
> >pumping.
>
>ok, that makes sense. Hadn't thought about that option.
>
> >(....friction neglected as in Physics books)
>
>I wonder though if the restriction caused by a longer line would be more of
>a disadvantage than the risk of taking in water due to a low discharge. On
>the
>other hand, I'm convinced that, unattended, a small bilge pump on a battery
>can't possibly keep up for long with the inflow of a major breech, and that
>for practical purposes the pump will be used mainly for draining the small
>amounts
>of water that collect as a result of using the boat and from rain. So the
>bilge
>pump for me is less of a safety thing and more of a convenience thing.
>
>I guess i shouldn't obsess over it too much - the positive floatation
>should
>take care of any miscalculations :)
>
> >How the hell do you manage to send messages so that they come in several
>hours
>
> >earlier then the rest of the mail. Is you computer clock wrong or are
>you
>in
> >Australia or something. I have to get to the bottom of this or I could
>develop
>some
> >kind of phobia......
>
>During the day I sent messages from my ISP's web-based emailer. I will hit
>send
>on this one at about 2:55pm PST - email me in private about the time
>stamped
>on it when it arrives and I'll bring it up to my ISP. Any chance its
>getting
>marked in UTC?
>http://www.nwlink.com
>
______________________________________________________
Get Your Private, Free Email at http://www.hotmail.com
This archive was generated by hypermail 2b29 : Fri Mar 31 2000 - 03:27:10 PST