Eric's C21

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jtdums
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Re: Eric's C21

Post by jtdums » Tue Feb 20, 2018 10:37 am

Eric,
Great build so far and if you find yourself needing extra hands to facilitate a flip, I'm available and not too far from you.

I have not flipped a C21, but in the past I have managed to flip a couple boats successfully (usually by myself) with overhead straps and eye hooks from above.

On other boats, I relied on the internal forms to provide structure during the flip. (I locate the straps on two frames and remove most of the extras to reduce weight.

I don't build an entire frame around the outside, but I do like to support the hull once flipped. I have cut "cradles" for the hull by using the removed forms as templates (Minus hull thickness and glass) These I pad with pipe insulation to protect the paint.

Wish I had more pictures to share of the process, but when your "baby" is hanging from the ceiling I don't take time to snap photos.

Good luck with whatever you decide.


Sanding is cathartic...

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Re: Eric's C21

Post by Eric1 » Tue Feb 20, 2018 10:45 am

jtdums wrote:
Tue Feb 20, 2018 10:37 am
Eric,
Great build so far and if you find yourself needing extra hands to facilitate a flip, I'm available and not too far from you.

I have not flipped a C21, but in the past I have managed to flip a couple boats successfully (usually by myself) with overhead straps and eye hooks from above.

On other boats, I relied on the internal forms to provide structure during the flip. (I locate the straps on two frames and remove most of the extras to reduce weight.

I don't build an entire frame around the outside, but I do like to support the hull once flipped. I have cut "cradles" for the hull by using the removed forms as templates (Minus hull thickness and glass) These I pad with pipe insulation to protect the paint.

Wish I had more pictures to share of the process, but when your "baby" is hanging from the ceiling I don't take time to snap photos.

Good luck with whatever you decide.
Thanks JT! That's very kind of you. :)

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Re: Eric's C21

Post by Capt UB » Tue Feb 20, 2018 12:01 pm

Wish I had more pictures to share of the process, but when your "baby" is hanging from the ceiling I don't take time to snap photos.
Most cell phones cameras have a setup to take a picture just by saying cheese or smile. Put camera on a tripod or tape it to something.

Hands free selfies....

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Re: Eric's C21

Post by Fuzz » Tue Feb 20, 2018 1:21 pm

Eric now is the time to build a form fitting cradle. I would run a couple of 2bys down the hull where the stringers will be and then some supports that come up high enough to clear the bottom and then base boards to that. Someone just did it and I will try to find it and post it.some thing like what FairWX pilot did with his dory.
I think when you do flip your hull it is going to be a non event and you will see you have been stressing over nothing. Heck I had the lifting eye brake while flipping the hull I am working on now once years ago. Had it about 10 foot in the air at the time. All it did was raise a bunch of dust and my heart rate :help:

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Re: Eric's C21

Post by Eric1 » Tue Feb 20, 2018 2:04 pm

Fuzz wrote:
Tue Feb 20, 2018 1:21 pm
Eric now is the time to build a form fitting cradle. I would run a couple of 2bys down the hull where the stringers will be and then some supports that come up high enough to clear the bottom and then base boards to that. Someone just did it and I will try to find it and post it.some thing like what FairWX pilot did with his dory.
I think when you do flip your hull it is going to be a non event and you will see you have been stressing over nothing. Heck I had the lifting eye brake while flipping the hull I am working on now once years ago. Had it about 10 foot in the air at the time. All it did was raise a bunch of dust and my heart rate :help:
Thanks Fuzz. I'm more concerned with the cradle under the boat after the flip. I can stand on the hull with it upside down. Once flipped I'll be on the weak side of the hull. Think how a windsheild can withstand pressure from the out side but not the inside. I don't want my fat self breaking the hull.
Maybe it's no concern but I would rather raise the question than not. :help:

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Re: Eric's C21

Post by TomW1 » Tue Feb 20, 2018 9:57 pm

Hey bud run several 2x6's the length of the hull like bunks on a trailer. Maybe two on each side for as far forward as you can, that will work for most of the hull and give you something to walk on. Build rest of the cradle over them. The keel has enough fiberglass now that you can work along it.

Tom
Restored Mirror Dinghy, Bought OD18 built by CL, Westlawn School of Yacht Design courses.

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Re: Eric's C21

Post by jacquesmm » Tue Mar 13, 2018 3:04 pm

For a cradle, check this:
http://bateau2.com/howto/foam7.php

IMHO, it is overkill for a C21 but if you build that kind of cradle, make it with round corners, it rolls easily that way.

I did a search with the word "flip" and found many pictures.
What you should kjeep in mind is that, if you build a cradle, the framing must support the hull.
Again, I do not think it is necessary: with a good rubrail and supporting the rail at the molds, you should be able to roll her the way she is but here are some more pictures:
http://gallery.bateau2.com/displayimage.php?pid=67927

http://gallery.bateau2.com/displayimage.php?pid=67928

viewtopic.php?f=12&t=61898&p=414608&hilit=flip#p414608

This one is good too:
viewtopic.php?f=12&t=43970&p=345075&hil ... le#p345075
It is a CS23 rolled on the sheer, no cradle.

Here, a simple cradle:
http://gallery.bateau2.com/albums/userp ... C00077.JPG

Do a search in the gallery with the word "cradle" and you will see many pictures.
Jacques Mertens - Designer
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Re: Eric's C21

Post by Eric1 » Tue Mar 13, 2018 3:52 pm

jacquesmm wrote:
Tue Mar 13, 2018 3:04 pm
For a cradle, check this:
http://bateau2.com/howto/foam7.php

IMHO, it is overkill for a C21 but if you build that kind of cradle, make it with round corners, it rolls easily that way.

I did a search with the word "flip" and found many pictures.
What you should kjeep in mind is that, if you build a cradle, the framing must support the hull.
Again, I do not think it is necessary: with a good rubrail and supporting the rail at the molds, you should be able to roll her the way she is but here are some more pictures:
http://gallery.bateau2.com/displayimage.php?pid=67927

http://gallery.bateau2.com/displayimage.php?pid=67928

viewtopic.php?f=12&t=61898&p=414608&hilit=flip#p414608

This one is good too:
viewtopic.php?f=12&t=43970&p=345075&hil ... le#p345075
It is a CS23 rolled on the sheer, no cradle.

Here, a simple cradle:
http://gallery.bateau2.com/albums/userp ... C00077.JPG

Do a search in the gallery with the word "cradle" and you will see many pictures.
Thanks Jacques. How do you feel about temporarily gluing the frames and battens to the hull? You have me talked out of the cradle by the way. I think that money will be better spent in the final product instead.

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Re: Eric's C21

Post by jacquesmm » Tue Mar 13, 2018 4:29 pm

If you don't use a cradle (which I approve), you could add a couple of temporary deck beams at the widest point. I mean spreaders to keep the sheer from flexing.
Molds and stringers may move during the turn but I would be surprised, Fasten the two main molds (frames) to the inside of the rubrail with temporary drywall screws of even a few epoxy spot welds that you grind off later. Steel fabricators do that.
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http://bateau.com

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Re: Eric's C21

Post by Eric1 » Thu Mar 15, 2018 3:40 pm

Going to pick up some lumber tomorrow. Might even get some wood work done.
Fingers crossed.

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