Scott Dunsworth Posted August 11, 2005 Posted August 11, 2005 Got some done this week, not a lot but some. Both berths are painted along with centerboard case. Galley and #3 bulkhead are not yet. I don't know how I want to do the galley yet. As you can see the #3 bulkhead that has the tabernacle mounted to it is not painted. As I was sanding, I sanded through the epoxy in a few places so I have to recoat it and wait for it to age a bit before painting. Got the rudder completed except painting. ( waiting on the epoxy again) The rope on the center board needs a little more fairing. I might get to lay that cherry flooring in the cabin soon. remember that that I cut for the cockpit. :oops: The cockpit needs a little more touching up. Every time I think its ready for primer I find something that could be a little smoother. Then I usually sand to far and get into the glass and have to wait on epoxy again. Anyway here are a few pictures. Scott Quote
Ken_Potts Posted August 11, 2005 Posted August 11, 2005 Scott, that boat is really looking good! I think maybe I ought to have you build the next boat I build. Wait, that doesn't make any sense... Quote
Guest Posted August 11, 2005 Posted August 11, 2005 Scott, you are being very thorough with your construction process and it will really show off when all the parts come together in the not so distant future. Great job. Quote
Scott Dunsworth Posted August 12, 2005 Author Posted August 12, 2005 Thanks Ken and Oyster. A job I am not looking forward to is the lead pour. When the centerboard is faired to a reasonable degree I'll cut the tip off and make the ballast and board tip molds. I would like to get that out of the way before winter. The plans tell how to make a mold for the ballast but I don't understand how or what materials are used for the board tip. Anyone been there? Tips? Scott Quote
Ken_Potts Posted August 12, 2005 Posted August 12, 2005 Not having seen the plans (or poured lead) I don't have much help to offer except that if you're worried about the lead pour maybe you should do a practice pour. Mold something, anything, out of lead. It's not like you'll be using up valuable lead because you can always re-melt it. Experiment and enjoy. Quote
Scott Dunsworth Posted August 14, 2005 Author Posted August 14, 2005 Thanks for the info Ray. I have a tank to make a lead pot as per Grahams recommendations. Just don't know if it will hold 400 lb. of lead. Scott Quote
Howard Posted August 14, 2005 Posted August 14, 2005 Did I read somewhere you could use an old cast iron bathtup as your melting pot? How hard is it to get the wheel weights? Do tire shops sell it, give it away? If you give them buckets, will they hold them for you? Quote
capt jake Posted August 14, 2005 Posted August 14, 2005 Yes, I have seen the cast iron bathtubs used for this. I picked up some wehel weights at a tire shop, though most of them have agreemnents to have a recycler pick them up. Thus, I had to pay .25/lb for them. It wasn/t too bad, though there was about 15% waste after it was all done (clips, crud and junk). Kinda fun casting lead. I have a bunch of bread pan weights I use in the shop now. Quote
Howard Posted August 14, 2005 Posted August 14, 2005 I've developed this habit of building stuff in my head before I do it for real....which could be construed as a defect or virtue, depending on how you look at it. Anyway, as relates to the topic at hand, I'm also contemplating building a Princess 26 or maybe even the 30 if that becomes available, and am trying to decide if I'm up to it. One of the BIG tasks for me would be to pour that keel. In planning for this, I was doing the math, and after a couple of test measures....one being a 25# bag of lead shot, the other a 12 oz fishing weight...(only lead I have), I came up with a displacement of from 1.33 to 1.68 oz of water per pound. If I'm doing my math correctly, I find the liquid volume to be equal to 4.16 to 5.25 gallons for a 400# keel. Say 4.75. And slightly over 8 gallons for a 700# keel. Too much for a 20# size propane tank...but not nearly enough to need a bathtub. But if I got the math wrong...obviously this could change. Can a gate valve be used to control the dump/pour, or will the lead clog that up? Trying to think of ways to minimize the excitement. The setup I've built in my mind is a crucible of some type, over a propane fired fish cooker, with drain pipe...heated by an array of propane torches, to a gate valve and a very short drop into a mold. The mold having been built from 2 x ? lumber, with a sheet metal liner (rounded bottom corners), with a cap or lid...and set at an incline, such that shape of all four sides are smooth after the pour. With a cap, I could also have the keel bolts already in place...bolt heads with large washers suspended in the middle and fixed in place right into the pour. All this and I don't even have the plans yet! Quote
JeffM Posted August 14, 2005 Posted August 14, 2005 Here's a less error-prone way to figure the volume: my dictionary has the density of lead at 11.35g/cm3. There are 1000cm3 in a liter, which is a little over a quart. That's 11350g, or 11.3kg/liter. A kilogram is a bit over 2 pounds (2.1, I think). So lead weighs in at about 24lb/liter, so a 400lb keel would have a volume of 400lb/24=16.6 liters, or 4.4 gallons. (I owe that last conversion factor to many visits to urinals that use "3.8lpf.") It does indeed sound like you're just outside the range of a propane tank. Quote
capt jake Posted August 15, 2005 Posted August 15, 2005 I used to have several sites for lead. Try looking at this. I really am impressed with this fellows abilities all the way around. I switched browsers a while back and lost a few links. http://www.rutuonline.com/html/the_keel.html Quote
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