November 2003 - montgomery_boats - mailman.xmission.com

Re: M-17 CENTERBOARD
by MC Carpenter 24 Nov '03

24 Nov '03

That goes for me too, I come from age of B.C. or Before Computers, so its a learning curve to catch up, some folks are a real wiz at this stuff.

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cruise list
by MC Carpenter 24 Nov '03

24 Nov '03

I put a list together a few years back of seven things to have before a long trip with a sailboat with out a solid dinghy, that is small than 24 feet for me. If I can get this great little sailboat to fit my needs Bermuda is the goal.

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Re: drawing
by MC Carpenter 24 Nov '03

24 Nov '03

I think I have the idea how to make a new drawing, it will be ready soon, its learning curve. You can buy blocks of almost any of plastic from companies like "Port Plastics" or "Piper Plastics", I think they have a web sight, I know they have a complete catalog on CD. I buy rods and plate Teflon and make bearings and any thing part I need that will better frictionless. Delrin comes in two main forms, one is especially for any kind of load bearing and will outlive the boat in salt water. Just hose it off . It can be readily machine with simple wood tools and but is best done on a lath or mill. Until I get this drawing together,I now have a program called autosketch which may help. I will try to explain. The existing board (old) can be center of effort marked and the area calculated. It comes to about 2.65 sq ft.. The depth remains the same, the width will be adjusted according to the area to match the existing center of lateral area . This can be done several ways but cost can be used to keep the number of ways limited. For me and I am not concerned with hitting something, so I can use the simple screw method in the new board. The new board will smaller in the truck but the same size when extended. A screw jack principal is used with the nuts buried in the lead weight. the round lead plug is inside the Teflon foil, which inch idea the trunk. it slides up and down on two easily cut to shape Teflon bushing the same foil shape as the board (dagger style). It would be wise at this point to use a stainless steel steer as this is already availed form trailer jacks, only the nuts an are special because they are buried in the lead weight. Most parts can be made with simple tools and it easy to remove for cleaning or any repair. The top of the screw handle to fits through the top of the centerboard trunk. BUT again I will try to build a small model first. The excess space in the trunk casing can be filled in, So water has no access to the iron ballast from the outside anyway. Silicone and bronze are great choices but are very expensive their cost could go as high as $1400.00. The difference in weight from old centerboard to new sliding board becomes the keel bulb, approx 61 lbs on each side. Its all a learning curve right now. What do you think of adding a soft rubber flap to either side of the board to wipe the board as it goes up and down.

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RE: M_Boats: Tom Smith Check Your Computer???
by Smith, Tom 23 Nov '03

23 Nov '03

Interesting. Is anyone else having problems with message sent from tom.smith(a)itron.com? Nine times out of ten I'm emailing from work (always 'round midnight after I finish many hours of hard labor, of course), or through the server at work, as is the case with this email. I'd be very surprised if these messages are carrying anything but my weird opinions... Tom Smith & Jane Van Winkle Sandpoint, Idaho M15-345, Chukar M17-064, Unnamed -----Original Message----- From: Steve & Diana Parsons [mailto:sparsons@canby.com] Sent: Saturday, November 22, 2003 9:41 PM To: Montgomery Boat List Subject: M_Boats: Tom Smith Check Your Computer??? Tom, Sorry to be sending this via the Montgomery list, but I have received three or more emails from you that have gone into quarantine by my ISP because of suspected viruses. I tried to forward back to the direct email address TSmith(a)jcarmony.com, but it bounced back. It could also be that someone is spoofing your address. Regards, Steve sparsons(a)canby.com _____ This message was scanned for viruses!!

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Tom Smith Check Your Computer???
by Steve & Diana Parsons 23 Nov '03

23 Nov '03

Tom, Sorry to be sending this via the Montgomery list, but I have received three or more emails from you that have gone into quarantine by my ISP because of suspected viruses. I tried to forward back to the direct email address TSmith(a)jcarmony.com, but it bounced back. It could also be that someone is spoofing your address. Regards, Steve sparsons(a)canby.com

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Re: M_Boats: ballast
by Wcpritchett＠aol.com 23 Nov '03

23 Nov '03

Smaller keel cb boats have a good portion of the ballast in the board so keeping it down in severe weather is probably best for self righting. On larger boats the weight normally is a small portion of the total ballast. This set up makes more lateral resistance without the ballast to back it up...the math on this can be found in Skene's Elements of Yacht Design. I think Sparkman & Stevens wrote about this years ago when one of their keel c/b ketches got caught in a hurricane...I think that particular boat was featured in a National Geographic series and design named Gulfstream. Food for thought...if a boat is "hove to" with a drogue out from the bow and the board down, when a wave hits the bow it can pivot around easier and put the beam to weather...enhancing the knockdown probability. Keeping the board up changes the arm and reduces the pivot. Bill

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Re: M_Boats: traveler on stern
by Steve R. 23 Nov '03

23 Nov '03

Here is a P-19 with a traveler track mounted like a stern rail: http://bbs.trailersailor.com/forums/potter/index.cgi/read/29025 Steve R. M-15 #119 Lexington, KY --- "Honshells" <chonshell(a)ia4u.net> wrote: Yes, Mike, I have, but it required a kick-up rudder. I've thought about ways to have a traveler such as mine without modifying the lifting rudder . . . The best I've come up with is a tiller handle that could slide in a long vertical slot. When you went to raise the rudder, you'd pull a pin keeping the tiller handle in position, and it would slide down the slot while the rudder lifted "up" . . . The link to pics of my transom traveler is below. Fair winds, Craig, chonshell(a)ia4u.net My traveler is visible in several of the pics in this link, but is very clear in the second pic from the top (the one with the gas cans in the background) . . . http://www.msog.org/how-to/rudders/honshell.cfm ----- Original Message ----- From: "MC Carpenter" <southisland2(a)earthlink.net> To: "For and about Montgomery Sailboats" <montgomery_boats(a)mailman.xmission.com> Sent: Wednesday, November 19, 2003 11:25 PM Subject: traveler on stern I was thinking of changing the traveler and putting it on the stern rail, has any done that. It would free up the cockpit a little. Mike _______________________________________________ http://mailman.xmission.com/cgi-bin/mailman/listinfo/montgomery_boats

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Potter and Catalina
by MC Carpenter 23 Nov '03

23 Nov '03

Had an interesting conversation this afternoon, with couple of boat owners here in Mission Bay. One person works in the boat yard a another claims to be into marine and navel architect designs. So here goes, this is not my statement and I have never heard this before. "That most if not all the keel - centerboards have less than a 10% increase in windward performance compared to the board being up or down, but the real benefit to lowering the centerboard is the lower the weight for ballast in carrying full sail, or for self rescue" Is any one a designer of sailboats listening, I would like to know how true that statement is. This statement does not include pure centerboard or dagger board sailboats

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p.s., traveler on stern
by Honshells 22 Nov '03

22 Nov '03

This past season, I enjoyed having the traveler on the stern. I enjoyed the uncluttered cockpit. I'm thinking of adding a teak cockpit grate, which would be complicated if I still had a cockpit-floor traveler. ----- Original Message ----- From: "Honshells" <chonshell(a)ia4u.net> To: "For and about MontgomerySailboats" <montgomery_boats(a)mailman.xmission.com> Sent: Saturday, November 22, 2003 5:52 PM Subject: traveler on stern Yes, Mike, I have, but it required a kick-up rudder. I've thought about ways to have a traveler such as mine without modifying the lifting rudder . . . The best I've come up with is a tiller handle that could slide in a long vertical slot. When you went to raise the rudder, you'd pull a pin keeping the tiller handle in position, and it would slide down the slot while the rudder lifted "up" . . . The link to pics of my transom traveler is below. Fair winds, Craig, chonshell(a)ia4u.net My traveler is visible in several of the pics in this link, but is very clear in the second pic from the top (the one with the gas cans in the background) . . . http://www.msog.org/how-to/rudders/honshell.cfm ----- Original Message ----- From: "MC Carpenter" <southisland2(a)earthlink.net> To: "For and about Montgomery Sailboats" <montgomery_boats(a)mailman.xmission.com> Sent: Wednesday, November 19, 2003 11:25 PM Subject: traveler on stern I was thinking of changing the traveler and putting it on the stern rail, has any done that. It would free up the cockpit a little. Mike

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traveler on stern
by MC Carpenter 22 Nov '03

22 Nov '03

I was thinking of changing the traveler and putting it on the stern rail, has any done that. It would free up the cockpit a little. Mike

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