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The Cold Mold Construction Fight Club

Old 11-13-2018, 07:25 PM
  #6121  
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Originally Posted by Otseg View Post
Funny story about CAD design. For 9 years I rented a shed from Bob Derecktor in Florida. He used MAD to design his boats. Model Aided Design. We built a 50' sailboat together and model tested the design. Anyone in the shop could make their own version during the design process. I would make a model, then a mold off the model, then a part, then tow test those.
Bob took one of the best of then all, slit the bottom, pushed it down on the bench to take out rocker, then we glassed it back. It was better, so the process was repeated, and better again.

Since the hull was aluminum with a composite deck, I needed to get the lines into the computer for plasma cutting the frames. A boat designer Buddy produced a gorgeous set of lines from a CAD program of the day.

Bob looked at them, looked at me and said; "Do you think we should make one more model from these lines to be sure? I said Fk, I guess so. I did and the beautiful model that I used to make a beautiful mold which produced a beautiful hull was beautiful but slower. I guess there were no B Splines to match "cut bottom, flatten to bench and re-glass".

My Buddy pushed and pulled and tricked the program to exactly match the hull lines offsets I had given him. Another friggin model, another friggin mold and another friggin part and all good.
The boat won the Newport-Bermuda Race first time out of the box.



You sure post some interesting stuff. You’ve been doing this for quite some time eh?
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Old 01-21-2019, 09:28 PM
  #6122  
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This image is of a surfboard shaping bay. The lights are just above the shaping stand so as to cast highlights and shadows on curves of the the rails and the concave.

Have you guys tried using lighting to help you find the high and low spots on a cold mold hull? I'm wondering if it might help you reduce the use of fairing compound (thus fairing) by helping you sand out the high spots. ​​​​​​​
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Old 01-21-2019, 09:29 PM
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I'm betting @berky has used one of these a time or two.
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Old 01-22-2019, 08:36 AM
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Originally Posted by rrhyne View Post


This image is of a surfboard shaping bay. The lights are just above the shaping stand so as to cast highlights and shadows on curves of the the rails and the concave.

Have you guys tried using lighting to help you find the high and low spots on a cold mold hull? I'm wondering if it might help you reduce the use of fairing compound (thus fairing) by helping you sand out the high spots. ​​​​​​​
Depending on the material, sanding high spots may or may not be a good idea. If foam is the skin then yes but plywood like most cold molded boats you don't want to sand too much off. It is a great idea for helping to ID contours though!
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Old 01-22-2019, 01:39 PM
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Originally Posted by bills106 View Post
Depending on the material, sanding high spots may or may not be a good idea. If foam is the skin then yes but plywood like most cold molded boats you don't want to sand too much off. It is a great idea for helping to ID contours though!
or to see out badly your sheet rock was done
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Old 02-05-2019, 10:19 AM
  #6126  
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I see that after I leave for a year or so no one likes to fight anymore, y'all all should have your man cards revoked....
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Old 02-05-2019, 10:30 AM
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Old 02-05-2019, 11:24 AM
  #6128  
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Originally Posted by bills106 View Post
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Old 02-08-2019, 04:24 PM
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Originally Posted by GCC View Post
I see that after I leave for a year or so no one likes to fight anymore, y'all all should have your man cards revoked....
When you going to start tha new sled of yours? Bills didn’t talk you into one of those floating coolers did he?😀
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Old 02-09-2019, 05:32 AM
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Originally Posted by Wishniwasfishn View Post


When you going to start tha new sled of yours? Bills didn’t talk you into one of those floating coolers did he?😀
See GCC, that there is how you get a fight started

Floating cooler, I guess its better than a sunk cooler! If he follows through on the plans he was considering i might be able to influence him a little. (Its a small community wishiniwasfishn, and the fine fellow drafting them just might have accidentally emailed me a drawing or two). Just this past week weve been back and forth on various composite panel construction options and methods to shave weight. I'll let him share those if he wants to (another tht'er of course!) But suffice it to say we know what GCC's going to do before he does!

Punch, counterpunch...
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Old 02-09-2019, 07:24 AM
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I know he made some good friends with his last project and I know he will be getting some good advice.

I just hope hope he decides to share it with us again.
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Old 02-10-2019, 05:54 AM
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Originally Posted by Wishniwasfishn View Post
I know he made some good friends with his last project and I know he will be getting some good advice.

I just hope hope he decides to share it with us again.
Not only do I hope GCC shares his new build, I hope he learned enough on the first one so he can do this one faster.

I ain't getting any younger here.
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Old 02-10-2019, 06:43 AM
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Originally Posted by aFORDable View Post
Not only do I hope GCC shares his new build, I hope he learned enough on the first one so he can do this one faster.

I ain't getting any younger here.
Go ahead and get that nice recliner you've always wanted (the one that lifts up so you can get in and out). While your at it, ask your optician for bifocals on your next set of glasses, you're going to need them!

If GCC was going to build the same boat he'd easily do it in half the time but no, he's a closet masochist and going much bigger on this one. Must have been some paint fumes getting past his respirator!
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Old 02-11-2019, 12:31 PM
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Yes there is another build coming to THT. (hopefully by spring) and it'll be a 40ish walk-around express with a rounded transom and outboards. Having passed the learning curve, the process should move much faster but still not above the speed of extra cash flow to build it as I go. I'm not one of them rich NC builders that the only problem they're faced with is where to stash all their cash! No its not going to be a foam hull but I'm certain it will have its share of D-Cell integrated into it. I prefer to use Okume ply this time instead of Meranti like I used last time, due to it being easier to work with. Probably go with Cypress for the stringers and keel. It's all still in the "kickin around" stage right now. Got a couple things I need to get off of my plate before I get started.
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Old 02-11-2019, 01:33 PM
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Originally Posted by GCC View Post
Yes there is another build coming to THT. (hopefully by spring) and it'll be a 40ish walk-around express with a rounded transom and outboards. Having passed the learning curve, the process should move much faster but still not above the speed of extra cash flow to build it as I go. I'm not one of them rich NC builders that the only problem they're faced with is where to stash all their cash! No its not going to be a foam hull but I'm certain it will have its share of D-Cell integrated into it. I prefer to use Okume ply this time instead of Meranti like I used last time, due to it being easier to work with. Probably go with Cypress for the stringers and keel. It's all still in the "kickin around" stage right now. Got a couple things I need to get off of my plate before I get started.
sub'd..... already
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Old 02-11-2019, 01:42 PM
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Originally Posted by GCC View Post
Yes there is another build coming to THT. (hopefully by spring) and it'll be a 40ish walk-around express with a rounded transom and outboards. Having passed the learning curve, the process should move much faster but still not above the speed of extra cash flow to build it as I go. I'm not one of them rich NC builders that the only problem they're faced with is where to stash all their cash! No its not going to be a foam hull but I'm certain it will have its share of D-Cell integrated into it. I prefer to use Okume ply this time instead of Meranti like I used last time, due to it being easier to work with. Probably go with Cypress for the stringers and keel. It's all still in the "kickin around" stage right now. Got a couple things I need to get off of my plate before I get started.
Oh God here comes the gofundme. Ha ha. Looking forward to following.
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Old 02-11-2019, 04:01 PM
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Originally Posted by muskrattown View Post
Oh God here comes the gofundme. Ha ha. Looking forward to following.
Thats a GREAT idea, better yet y’all can just PayPal me money at random!
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Old 02-15-2019, 04:22 AM
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Meanwhile at CFCC's boatbuilding program...



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Old 02-15-2019, 08:08 AM
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Wait, what??? Those planks fitted on the sides look like they're got glue between them, are they doing the sides first???
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Old 02-15-2019, 09:09 AM
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Originally Posted by bills106 View Post
Wait, what??? Those planks fitted on the sides look like they're got glue between them, are they doing the sides first???
It does appear so... I will be on site Monday for a first hand report
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