Opening A Bow

brents

Seaman
Joined
Aug 24, 2007
Messages
69
I am working on my winter project which is a 15' 1968 Chrysler Del Ray. It is a closed bow, and I would like to open it up. I have been searching the forums and came accross some info regarding weight distribution up front when opening a closed bow. My question is, if I open the bow, is it unsafe to have people ride up front while on plane? I would leave the support braces on either side of the hull in the very front were it V's. Other than that, the only other support is the part I am wanting to remove, which is no more than a sheet of aluminum attached to the boat cap. I am wanting to accomodate 2 seats and a casting deck.

I also have another question, when I took the deck and foam out I noticed there were no stringers in the boat, nor a bilge area or drainage area. The only drain holes in the transom were for the splash well. Should I build a bilge area into the new flooring or simply rebuild as is? If I add an area in it would seem to me the hull would be significantly weaker due to the boats reliance on the foam. I know a lot of people argue the foam has no structural use for boats, but this boat certainly uses the foam for structural purposes.
 

brents

Seaman
Joined
Aug 24, 2007
Messages
69
Re: Opening A Bow

I will do tonight when I get home. I was thinking I probably should.
 

brents

Seaman
Joined
Aug 24, 2007
Messages
69
Re: Opening A Bow

Ok, apparently my wife decided to lend out our camera. I will post pics as soon as she gets it back.
 

Willyclay

Captain
Joined
Sep 8, 2006
Messages
3,268
Re: Opening A Bow

Regarding the question you raised of the structural properties of the foam in your boat, let me share with you what I found out when researching my boat. I had a 1965 Lonestar Medallion II that had what they called "Foam-Pac" construction. It was as you described with your boat; no stringers, drain holes or bilge area below the deck/floor which was plywood fiberglassed to the sides of the hull and transom plus bonded to the foam. I believe Chrysler purchased Lonestar so it makes sense to me that the foam is indeed part of the structure of your boat.
 

Nandy

Commander
Joined
Apr 10, 2004
Messages
2,145
Re: Opening A Bow

I will follow this post closelly as I am wanting to do the same with a closed bow cobia I bought. I ask about it in the cobia website but they warn me about how the design of that boat might not accomodate such change and it might have a structural problem later on. but I have heard other people do the same with no apparent problem. I am working in the motor right now before putting money in the hull. The motor worked ok, but I wanted to rebuild all 3 carbs, upgrade water pump, make telltale port before. Going really slow now.
 

Mark42

Fleet Admiral
Joined
Oct 8, 2003
Messages
9,334
Re: Opening A Bow

The foam in that classic Chrysler is a structural part of the boat. Chrysler was very proud of that fact. They used to have cross section photos of the boat in the sales brochure.

I hate to see someone cut up a nice old classic like that. If its worth the time you are going to put into it to convert it to an open bow, it's worth restoring to orignal condition.

Believe me, if you clean it up and keep the original flavor of the boat, it will be a real head turner on the water.
 

drewmitch44

Lieutenant Commander
Joined
Jun 26, 2005
Messages
1,749
Re: Opening A Bow

Im doing it. Im going to leave some of the edges of the top and glass ply cut all around the corners on the bottom of the top. Im going to glass the ply to the bottom of the top to keep the rigidity. Im undecided so far if im going to make it a center console or if im just going to make it a duel console and keep it in a fishing state. If you look at my shareaproject you will see what im working with. i love the way this boat runsin the water and i want to keep it but need it to have more room for gear and what not. When i take the top off this weekend im going to acess how much ply i will need to reinforce the edges. I will prob. use 4-6 inches on the twards the sides and about 6-8 inches at the peak of the bow. Then glass it all together to the top. Ill post my pics as i go.
 

Nandy

Commander
Joined
Apr 10, 2004
Messages
2,145
Re: Opening A Bow

Ur boat hull is similar to mine. Once I start i will get me a shareproject page.
 

brents

Seaman
Joined
Aug 24, 2007
Messages
69
Re: Opening A Bow

I had the same thoughts about supporting the shull sides by glassing in the ply. It would seem to me that adding a deck would increase the stability significantly. I need to get some pictures posted.

WillyClay, how did your Lonestar ride? I never heard the phrase "foam-pac" construction, I will have to research that.
 

tashasdaddy

Honorary Moderator Emeritus
Joined
Nov 11, 2005
Messages
51,019
Re: Opening A Bow

1965: Chrysler Boat Corporation formed in May, 1965 with the purchase of Lone Star Boats. The Lone Star name is gone, but Chrysler does an admirable job with the boats and has much success on into the late '70s. Marine Division is discontinued in 1979 and outboard division sold to OMC
 

Willyclay

Captain
Joined
Sep 8, 2006
Messages
3,268
Re: Opening A Bow

My LoneStar was a great old boat. Measured 16.5ft with high sides and a shallow V bottom. I ran a 1968 Johnson 100HP V4. The whole rig weighed less than 1000lbs and would top out about 35MPH with just me in the boat. Sadly, salt corrosion and rotten floor/transom finally did it in last year.
 

brents

Seaman
Joined
Aug 24, 2007
Messages
69
Re: Opening A Bow

Ok, I got pictures.

The first two are of the hull of the boat from the outside.
http://i93.photobucket.com/albums/l50/rs051802/eth016.jpg
http://i93.photobucket.com/albums/l50/rs051802/eth015.jpg

This is a picture of the transom. I think the boat took on water back here, and as a result, shorted the battery which in turn fried all the electrical on the boat and caused some of the reaction to the aluminum as you can see in the pictures.
http://i93.photobucket.com/albums/l50/rs051802/eth009.jpg

This picture is from underneath the bow. If I build my walls solid, and put a deck in I don't see why this boat could not be converted. I am worried about the added weight of passengers up front however. Would seats in the bow area cause any problems when running the boat hard through the water.
http://i93.photobucket.com/albums/l50/rs051802/eth011.jpg

Finally, this is a picture of the hull, bare from the inside. As you can see, no stringers, no drainage. The more I considered the notion of "Foam-Pac" technology the more I wonder if removing the foam was a mistake. The foam was seriously thick, and attached to the hull, and while I don't think I have yet compromised the hull by removing it, I am worried that I will not be able to duplicate the necessary strength the foam adds. Does anyone have any thoughts on putting the foam back in. Should I put it in while it is still a little cool outside to reduce the expansion, therefore allowing me to put more in. It would seem the foam would be denser this way.
http://i93.photobucket.com/albums/l50/rs051802/eth014.jpg
 

brents

Seaman
Joined
Aug 24, 2007
Messages
69
Re: Opening A Bow

The progress looks good, keep us updated. I should get a chance to work on mine some this weekend. I will post pics of any progress soon.

Does anyone have any other feedback regarding my questions
 

drewmitch44

Lieutenant Commander
Joined
Jun 26, 2005
Messages
1,749
Re: Opening A Bow

im sorry brents i didnt mean to take over your thread. Ill start my own thread. I didnt mean to take away from your questions!
 

brents

Seaman
Joined
Aug 24, 2007
Messages
69
Re: Opening A Bow

Drew, No worries, your pictures provided good examples for what I am trying to do. Feel free to share, I share.
 
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