We never argue and relish productive debate. True Ahmet but a pump running continuously will not sink your boat and draws more attention than a silent one that won't turn on. On our boat I installed an audible signal that was a ping sound so it was not annoying. If any of the bilge pumps were running, you could hear the ping and see an LED on the indicator panel to see which pump was running. You quickly get to know the ping pattern for dock, and under way, and get an early warning if anything is abnormal.
Details and circuit diagram at http://www.yandina.com/hints.htm#BilgeAlarm I too no longer get the liveaboard posts. I think the information got lost in my dead computer. Ann-Marie ----- Original Message ----- From: ahmet erkan To: [EMAIL PROTECTED] Cc: [email protected] Sent: Wednesday, October 01, 2008 12:50 PM Subject: (T&T: & TWL2:) Re: Reliablity I don't want to argue with two giants like Ann-Marie and Norm but, two switches in parallel might make the situation worse. (reported failure mode at the beginning was "switch failed closed") Four switches may be used to eliminate single point switch failures which makes it not so elegant a design. BTW how does one sign-up to the liveaboardnow group ? Is it a continuation of the old liveaboard list ? I miss all the people in the old list. (ie: Yanni and all) Thanks Ahmet SV8827 ------------------------------------------------------------------------------ > From: [EMAIL PROTECTED] > To: [EMAIL PROTECTED]; [EMAIL PROTECTED] > CC: [email protected] > Subject: (T&T: & TWL2:) Re: Reliablity > Date: Tue, 30 Sep 2008 04:07:38 -0400 > > > No, two in parallel will not double, but it will increase reliability an > order of magnitude although the actual real life computation is quite > complex. > If the probability of a switch failure is 1 in 100,000 operations on the > first switch, > and the probability of a failure on the second switch is 1 in 100,000 > operations, > the probability that both failures will happen AT THE SAME TIME is 1 in > 10,000,000,000. > This is a gross simplification but demonstrates the approach. > > Regards, > > Ann-Marie Foster, > [EMAIL PROTECTED] > > ----- Original Message ----- > From: "Norm of Bandersnatch" <[EMAIL PROTECTED]> > To: "[EMAIL PROTECTED]" <[EMAIL PROTECTED]> > Cc: "A LiveAboardList" <[email protected]> > Sent: Tuesday, September 30, 2008 12:53 AM > Subject: Reliablity > > > > > > Wouldn't two in parallel simply double the reliability? > > > > Norm > > S/V Bandersnatch > > Lying Julington Creek > > 30 07.695N 081 38.484W > > > > > > Get two and put them in parallel for 10 times the > >> reliability if you're still paranoid. > > > > > > > --~--~---------~--~----~------------~-------~--~----~ To UNSUBSCRIBE or change your email from live to digest or web board only, please send a request to Andina at [EMAIL PROTECTED] POST messages in an email to [EMAIL PROTECTED] View the live board at http://www.yandina.com/TWL2 -~----------~----~----~----~------~----~------~--~---
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