New Design - TD3 dinghy FOAM!

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jacquesmm
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New Design - TD3 dinghy FOAM!

Post by jacquesmm » Thu May 02, 2019 3:12 pm

This is the first boat (on this web site) designed for foam sandwich.
I know that the LB26 and some other of my designs can also be built in foam sandwich but this one was designed from the start for foam.
Image
I needed a boat plan to illustrate the foam sandwich shop manual, small boat version, (coming soon) and I also needed a new dinghy.
My FS12 is too big and heavy to hoist on my swim platform.
The boat had to be 10' long and less than 50 lbs.
Plus large capacity, two rowing positions, long oar sculling, unsinkable, tow well.
As a starting point, I used an unfinished design by my step grandson, Thomas there fore the name: Thomas Dinghy 3.
The result is a boat that can weigh less than 40 lbs: there are options for heavy duty version but still less than 50 lbs.
Image
It has some special features like the long skeg for towing and sculling.
The plans will be available as soon as our new web site is up.


Jacques Mertens - Designer
http://bateau.com

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Re: New Design - TD3 dinghy FOAM!

Post by BB Sig » Thu May 02, 2019 3:36 pm

Nice boat for learning foam building!

I'll get the questions out of the way: :roll: :lol:

What size motor is she rated for?

How fast can she go?

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Re: New Design - TD3 dinghy FOAM!

Post by OneWayTraffic » Thu May 02, 2019 4:35 pm

Lines look similar to my D5, but a bit longer. If that's rocker in the hull, I am guessing displacement only 5hp? 2.5hp is more than I need to get my D5 up to max speed. My D5 is closer to 100lb.

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Re: New Design - TD3 dinghy FOAM!

Post by jacquesmm » Thu May 02, 2019 4:41 pm

Max. HP 2.5 but no limit on power or speed in the experimental version. The experiment may not last very long with anything above 5 HP but all the broken pieces will float.

It's not an enlarged D5 but all those dinghies look alike. I find the lines pretty and I used the max. out of a couple of sheets of foam.
It has a good amount of rocker, it's not a speed boat but she will row very well and track even in bad weather.
I must build one or find somebody to build one for me.

Does anybody want a free boat? I would buy the materials for 2 boats, I pick one, the builder gets the other.

It was also designed with the Great Loop design in mind. That dinghy must fit on the roof of a large boat.
Jacques Mertens - Designer
http://bateau.com

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Re: New Design - TD3 dinghy FOAM!

Post by fallguy1000 » Thu May 02, 2019 5:41 pm

I'm in!

Probably be able to make it from scraps!
My boat build is here -------->

viewtopic.php?f=12&t=62495

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Re: New Design - TD3 dinghy FOAM!

Post by fallguy1000 » Thu May 02, 2019 5:48 pm

Can you share the hull thickness??

I might have an excess of 1" plascore 4#, but if the bottom of yours is 6mm foam, I won't be able to compete.
My boat build is here -------->

viewtopic.php?f=12&t=62495

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Re: New Design - TD3 dinghy FOAM!

Post by fallguy1000 » Thu May 02, 2019 5:50 pm

I need a dinghy I can slip in front and between my hulls or top on the netting for any long trips. I think we can sneak a 10' in between on the slip and atop.

Has to be ultralight to go up from the front of the slip atop the netting beam.

Looks perfect.
My boat build is here -------->

viewtopic.php?f=12&t=62495

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Re: New Design - TD3 dinghy FOAM!

Post by jacquesmm » Thu May 02, 2019 6:00 pm

fallguy1000 wrote:
Thu May 02, 2019 5:48 pm
Can you share the hull thickness??

I might have an excess of 1" plascore 4#, but if the bottom of yours is 6mm foam, I won't be able to compete.
1/2" or 5/8" core. You may be able to use 1".
Jacques Mertens - Designer
http://bateau.com

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Re: New Design - TD3 dinghy FOAM!

Post by Netpackrat » Thu May 02, 2019 6:09 pm

Will there be an option for a sailing rig?

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Re: New Design - TD3 dinghy FOAM!

Post by Fuzz » Thu May 02, 2019 9:24 pm

How many sheets of foam will this take to build?
What is the plan for draining the skiff while it is being towed?

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