Marek and James, Thanks guys. Right. I always forget it's about fusing for the wire gauge and length. I have a 4' run of 4 gauge wire from each batt to the main switch, then a 5' foot run of 4 gauge to the starter motor on the A4.
However now that I look at the BlueSea systems chart for critical circuits I should be running 1 gauge for 150 amps (if that's really what the starter draws)... But I guess since the high amperage to the starter only lasts for a few seconds, then 4 gauge is sufficient? See here: http://assets.bluesea.com/files/resources/newsletter/images/DC_wire_selection_chartlg.jpg > On Jun 5, 2016, at 7:44 AM, cnc-list-requ...@cnc-list.com wrote: > > Send CnC-List mailing list submissions to > cnc-list@cnc-list.com > > To subscribe or unsubscribe via the World Wide Web, visit > http://cnc-list.com/mailman/listinfo/cnc-list_cnc-list.com > or, via email, send a message with subject or body 'help' to > cnc-list-requ...@cnc-list.com > > You can reach the person managing the list at > cnc-list-ow...@cnc-list.com > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of CnC-List digest..." > > > Today's Topics: > > 1. Re: Adjustable backstay? (Ronald B. Frerker) > 2. Re: Adjustable backstay? (ALAN BERGEN) > 3. Re: Battery Terminal Fuses (Marek Dziedzic) > 4. Re: Battery Terminal Fuses (jtsails) > 5. Moved the boat to Whitehall (schiller) > 6. Standard Horizon Windspeed (John and Maryann Read) > > > ---------------------------------------------------------------------- > > Message: 1 > Date: Sat, 4 Jun 2016 17:14:11 +0000 (UTC) > From: "Ronald B. Frerker" <rbfrer...@yahoo.com> > To: "cnc-list@cnc-list.com" <cnc-list@cnc-list.com> > Subject: Re: Stus-List Adjustable backstay? > Message-ID: > <823419262.1145000.1465060451474.javamail.ya...@mail.yahoo.com> > Content-Type: text/plain; charset="utf-8" > > Sam, like you said, the mast is more or less fixed, but not completely. ?As > you decrease backstay length the mast has two motions, bending and rotating > from the deck pivot point. ?As it rotates (pivots) backward it tightens the > forestay. ?That's about all I get with my tree trunk of a mast; no bending, > but more than an inch back and down. ?The thinner sections with multiple > spreaders and/or?babystays will get more bending. ?Both motions move the tip > of the mast back and down since the forestay is mostly fixed (it does > lengthen slightly since it's a bit of a catenary and more tension takes some > droop out). ?Since systems seek an equilibrium which reduces overall tension, > the babystay will loosen slightly with the bending, but will assist the > bending motion until equilibrium.Frac rigs get a lot more bending of course > by geometry alone. ?And tuning them starts with lighting a candle by the > hollow stump at midnight! ?Those with multiple spreaders are the devils own > design.RonWild Cheri C&C 30-1STL > > > > From: Sam Salter via CnC-List <cnc-list@cnc-list.com> > To: CNC-LIST <cnc-list@cnc-list.com> > Cc: Sam Salter <sam.c.sal...@gmail.com> > Sent: Friday, June 3, 2016 9:50 PM > Subject: Re: Stus-List Adjustable backstay? > > Looking at this as an engineering problem (I don't have a 30-2) - explain > what I'm missing: > Top of the mast is more or less fixed (fore and aft) by the forestay. Sure, > it will move back an inch or two when it takes up slack in the forestay, but > mostly it's going to stay put.Baby stay puts pre bend into centre of mast? or > at least fixes it in space, fore and aft.When backstay is tensioned won't the > top move mostly down and push the middle of the mast forward, slackening the > baby stay?Tensioning the forestay? and taking draft out of the main.Do you > guys see the baby stay go slack or am I full of it??? > sam?:-)C&C 26 Liquorice?Ghost Lake Alberta? > > #yiv7134972356 #yiv7134972356 -- _filtered #yiv7134972356 {panose-1:2 4 5 3 > 5 4 6 3 2 4;} _filtered #yiv7134972356 {font-family:Calibri;panose-1:2 15 5 2 > 2 2 4 3 2 4;} _filtered #yiv7134972356 {panose-1:2 11 7 3 2 1 2 2 2 > 4;}#yiv7134972356 #yiv7134972356 p.yiv7134972356MsoNormal, #yiv7134972356 > li.yiv7134972356MsoNormal, #yiv7134972356 div.yiv7134972356MsoNormal > {margin:0in;margin-bottom:.0001pt;font-size:12.0pt;}#yiv7134972356 a:link, > #yiv7134972356 span.yiv7134972356MsoHyperlink > {color:#0563C1;text-decoration:underline;}#yiv7134972356 a:visited, > #yiv7134972356 span.yiv7134972356MsoHyperlinkFollowed > {color:#954F72;text-decoration:underline;}#yiv7134972356 > p.yiv7134972356msonormal0, #yiv7134972356 li.yiv7134972356msonormal0, > #yiv7134972356 div.yiv7134972356msonormal0 > {margin-right:0in;margin-left:0in;font-size:12.0pt;}#yiv7134972356 > span.yiv7134972356EmailStyle18 {color:windowtext;}#yiv7134972356 > .yiv7134972356MsoChpDefault {} _filtered #yiv7134972356 {margin:1.0in 1.0in > 1.0in 1. 0in;}#yiv7134972356 div.yiv7134972356WordSection1 {}#yiv7134972356 > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: > <http://cnc-list.com/pipermail/cnc-list_cnc-list.com/attachments/20160604/5e02d1e4/attachment-0001.html> > > ------------------------------ > > Message: 2 > Date: Sat, 4 Jun 2016 11:35:07 -0700 > From: ALAN BERGEN <trya...@alumni.usc.edu> > To: "cnc-list-requ...@cnc-list.com" <cnc-list@cnc-list.com> > Subject: Re: Stus-List Adjustable backstay? > Message-ID: > <CABnKnf1SaAHTPa=4h5nvrgv7i0wl2fsu+cuvqgx5+5dsuqn...@mail.gmail.com> > Content-Type: text/plain; charset="utf-8" > > The babystay doesn't go slack. The whole mast moves back, but more at the > top than at the middle. If you want to see the effect of tightening the > backstay, look at the forestay, and sight up the mast from the side while > the backstay is not tensioned too tight. Then run a weighted line (or even > your main halyard if the main is down) from the top of the mast to the > boom. When you tension the backstay, the top of the mast moves back; the > middle of the mast moves back (less than at the top); the weighted line > will move aft along the boom; the forestay will be straighter and you'll > see the bend of the mast when sighting from the side from the boom to the > top of the mast. > > Alan Bergen > 35 Mk III Thirsty > Rose City YC > Portland, OR > > On Sat, Jun 4, 2016 at 10:14 AM, Ronald B. Frerker via CnC-List < > cnc-list@cnc-list.com> wrote: > >> Sam, like you said, the mast is more or less fixed, but not completely. >> As you decrease backstay length the mast has two motions, bending and >> rotating from the deck pivot point. As it rotates (pivots) backward it >> tightens the forestay. That's about all I get with my tree trunk of a >> mast; no bending, but more than an inch back and down. The thinner >> sections with multiple spreaders and/or babystays will get more bending. >> Both motions move the tip of the mast back and down since the forestay is >> mostly fixed (it does lengthen slightly since it's a bit of a catenary and >> more tension takes some droop out). Since systems seek an equilibrium >> which reduces overall tension, the babystay will loosen slightly with the >> bending, but will assist the bending motion until equilibrium. >> Frac rigs get a lot more bending of course by geometry alone. And tuning >> them starts with lighting a candle by the hollow stump at midnight! Those >> with multiple spreaders are the devils own design. >> Ron >> Wild Cheri >> C&C 30-1 >> STL >> >> >> >> >> ------------------------------ >> *From:* Sam Salter via CnC-List <cnc-list@cnc-list.com> >> *To:* CNC-LIST <cnc-list@cnc-list.com> >> *Cc:* Sam Salter <sam.c.sal...@gmail.com> >> *Sent:* Friday, June 3, 2016 9:50 PM >> *Subject:* Re: Stus-List Adjustable backstay? >> >> Looking at this as an engineering problem (I don't have a 30-2) - explain >> what I'm missing: >> >> Top of the mast is more or less fixed (fore and aft) by the forestay. >> Sure, it will move back an inch or two when it takes up slack in the >> forestay, but mostly it's going to stay put. >> Baby stay puts pre bend into centre of mast? or at least fixes it in >> space, fore and aft. >> When backstay is tensioned won't the top move mostly down and push the >> middle of the mast forward, slackening the baby stay? >> Tensioning the forestay? and taking draft out of the main. >> Do you guys see the baby stay go slack or am I full of it??? >> >> sam :-) >> C&C 26 Liquorice >> Ghost Lake Alberta >> >> >> >> _______________________________________________ >> >> This list is supported by the generous donations of our members. If you >> like what we do, please help us pay for our costs by donating. All >> Contributions are greatly appreciated! > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: > <http://cnc-list.com/pipermail/cnc-list_cnc-list.com/attachments/20160604/8e054c31/attachment-0001.html> > > ------------------------------ > > Message: 3 > Date: Sat, 4 Jun 2016 16:28:05 -0400 > From: Marek Dziedzic <dziedzi...@hotmail.com> > To: <cnc-list@cnc-list.com> > Subject: Re: Stus-List Battery Terminal Fuses > Message-ID: <blu407-eas39891ee62bc2690ec79e55ce...@phx.gbl> > Content-Type: text/plain; charset="us-ascii" > > Ryan, > > Select the fuse for the wire, not for the load. > > I would put a 150 A - 200 A fuse on the starter wire (it is probably a 4 ga > or better). Btw, these fuses can easily work through some higher current > (even 50% higher) for a short while, so possibly a 100 A fuse would be fine. > > On the house side, especially, if you never going to use it for starting the > motor, you could get away with a 20 A fuse. > > On my boat I have a dual fuse attachment on the battery - one 200 A for the > big red wire (4 ga) and a 15 A for the other wires (one coming from the > solar system, the other to the loads that don't go through the A/B switch > (e.g. bilge pump). > > Something like this: > https://www.bluesea.com/products/2151/Dual_MRBF_Terminal_Fuse_Block_-_30_to_ > 300A > > It works great, provided you have enough room above the battery (it needs > about a 1/2 inch extra on top) > > Marek > Ottawa, ON > > -----Original Message----- > From: CnC-List [mailto:cnc-list-boun...@cnc-list.com] On Behalf Of Ryan > Doyle via CnC-List > Sent: Saturday, June 04, 2016 09:33 > To: cnc-list@cnc-list.com > Cc: Ryan Doyle <ryanpdo...@gmail.com> > Subject: Stus-List Battery Terminal Fuses > > Hey guys, > > My 1976 30mki did not come with fuses at the battery terminals and I would > like to add them. > > I have a simple system with two batteries - one starting and one house. > > My house loads if I'm running the autopilot and I have every blower and fan > and led light on and add up to 12.3 amps. I have a new blue sea breaker > panel and all new 14 ga wires throughout. > > However, I have no idea what size fuse to put on the terminal of my starting > batt. The motor is an atomic 4. > > Anyone know? > > Thanks, > Ryan > > > _______________________________________________ > > This list is supported by the generous donations of our members. If you like > what we do, please help us pay for our costs by donating. All Contributions > are greatly appreciated! > > > > ------------------------------ > > Message: 4 > Date: Sat, 4 Jun 2016 16:38:42 -0400 > From: "jtsails" <jtsai...@gmail.com> > To: <cnc-list@cnc-list.com> > Subject: Re: Stus-List Battery Terminal Fuses > Message-ID: <BDBB52C01D6A49F5900FC8E71B161FB6@DrT> > Content-Type: text/plain; format=flowed; charset="iso-8859-1"; > reply-type=original > > Ryan, > The purpose of the fuse on the battery terminal is to protect the wire (and > switches, etc) that runs from the battery to the panel. This fuse should be > sized appropriately by the wire size. For example, My house bank uses 6 ga > wire to feed the panel, so I have a 100 amp fuse on it. No matter what I put > on the other side of the breaker panel, the job of the battery terminal fuse > is to protect that 6 ga wire. I don't have much stuff on my boat, so that is > much more than enough capacity for my case. If I had a lot of high demand > stuff, I would need to resize the wire that feeds the panel (and resize the > fuse that protects that wire). For the start battery, things get a little > more interesting. A starter motor can draw a very high load when you first > hit the button. For your A4, most people use 4 ga wire with a 150 amp fuse. > In my case, I used the same 6 ga/100amp setup as the house bank and I have > not had any problem. Most people would not approve of my setup, they would > say that it would blow lots of fuses. > James > Delaney > C&C 38 mk2 > Oriental, NC > > -----Original Message----- > From: Ryan Doyle via CnC-List > Sent: Saturday, June 04, 2016 9:32 AM > To: cnc-list@cnc-list.com > Cc: Ryan Doyle > Subject: Stus-List Battery Terminal Fuses > > Hey guys, > > My 1976 30mki did not come with fuses at the battery terminals and I would > like to add them. > > I have a simple system with two batteries - one starting and one house. > > My house loads if I'm running the autopilot and I have every blower and fan > and led light on and add up to 12.3 amps. I have a new blue sea breaker > panel and all new 14 ga wires throughout. > > However, I have no idea what size fuse to put on the terminal of my starting > batt. The motor is an atomic 4. > > Anyone know? > > Thanks, > Ryan > > > _______________________________________________ > > This list is supported by the generous donations of our members. If you like > what we do, please help us pay for our costs by donating. All Contributions > are greatly appreciated! > > > > > ------------------------------ > > Message: 5 > Date: Sat, 4 Jun 2016 20:19:28 -0400 > From: schiller <schil...@bloomingdalecom.net> > To: cnc-list@cnc-list.com > Subject: Stus-List Moved the boat to Whitehall > Message-ID: <ccdfb97f-c452-f3df-83da-4dba4cd95...@bloomingdalecom.net> > Content-Type: text/plain; charset="utf-8"; Format="flowed" > > Yesterday the crew (Glenn Gambel from the list and two other friends) > and I brought Corsair (Redwing 35) from South Haven, Michigan up the > lake to White Lake, Michigan. A run of 69 nm. We ended up motoring the > entire distance. I have sailed on Lake Michigan for 24 years and have > been becalmed for a few hours from time to time. Yesterday there was 0 > knots gusting to 1 (as reported by three of the buoys we passed) for the > entire day. We ran the Universal at 2350-2400 RPM making 6-6.2 knots > from 0840 until 1915. I would estimate that we used 4.5 to 5 gallons of > diesel for the trip. We did finally see some wind about 4.5 nm south of > the White Lake channel directly astern. We elected not to hoist sails. > A good run and nice to be in our new home. Now I need to think about > changing my port of call at my next document renewal. Many thanks to my > crew and Corsair. > > Neil Schiller > 1970 Redwing 35, Hull #7 > (C&C 35, Mark I) > "Corsair" > Whitehall, Michigan > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: > <http://cnc-list.com/pipermail/cnc-list_cnc-list.com/attachments/20160604/e28b9599/attachment-0001.html> > > ------------------------------ > > Message: 6 > Date: Sun, 5 Jun 2016 07:44:07 -0400 > From: "John and Maryann Read" <johnpr...@comcast.net> > To: <cnc-list@cnc-list.com> > Subject: Stus-List Standard Horizon Windspeed > Message-ID: <003501d1bf1f$9230fb30$b692f190$@net> > Content-Type: text/plain; charset="us-ascii" > > Just circling back on the fix for my WS150 instrument which is at least 20 > years old. You may recall I was getting erratic readings. Removed the > sending unit from mast head, plugged into receiver and worked fine. > Continuity from mast junction to receiver was fine. Took sending unit home, > disassembled and discovered small circuit boards for both the speed and > angle. Everything looked OK. Sprayed in electronic cleaner, let dry and > reassembled. Attached to receiver, worked fine and calibrated. Yesterday > crew went aloft and continuity of wire in mast is fine. Reinstalled sending > to mast head - works fine!! Best guess is the sending unit design is a > sleeve within a sleeve with an o ring sealer. After many years salt air and > condensation fouled something in the circuit boards that became an issue > with the longer wire run of the mast given the very small wire gauge and > sensitivity of the unit. Apparently the cleaner resolved. > > > > Hope this helps someone else in the future. > > > > John and Maryann > > Legacy III > > > 1982 C&C 34 > > Noank, CT > > > > > > > > --- > This email has been checked for viruses by Avast antivirus software. > https://www.avast.com/antivirus > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: > <http://cnc-list.com/pipermail/cnc-list_cnc-list.com/attachments/20160605/7720f65d/attachment.html> > > ------------------------------ > > Subject: Digest Footer > > _______________________________________________ > CnC-List mailing list > CnC-List@cnc-list.com > http://cnc-list.com/mailman/listinfo/cnc-list_cnc-list.com > > > ------------------------------ > > End of CnC-List Digest, Vol 125, Issue 26 > ***************************************** _______________________________________________ This list is supported by the generous donations of our members. 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