Rappahannock Boat Works Torpedo stern launch - RC Groups
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May 03, 2011, 05:05 PM
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Rappahannock Boat Works Torpedo stern launch

In looking around for an open launch hull to put my Graham TVR1A in, I found very few available hulls. that I liked.
Seeing as how there is more Torpedo stern hull obsession on the west side of the pond, me included, I was interested when bgnome posted pictures of a group of full size steam boats built by Ronnie Baird of Rappahannock Boat Works.

And when I saw that plans and molds were available for the 3 styles of hulls: wineglass, fantail & torpedo stern I had to inquire about them.

I was told that the full size torpedo stern hull was very stable and leaves very little wake.
But alas, I was told there were no plans.
Ronnie builds like the famous designers of the past. He carves a ˝ hull model then takes the lines & measurements off that to build full size. (Or any size for that matter)
The current full size Torpedo stern, Holly Lyn, is 24’ length & beam of 6’6”.

Seeing as how I had requested to purchase plans, Ronnie asked if I could use tracings of the mold station shapes (shadows) from the ˝ hull and enlarge them to whatever size I wanted.
I would still have neither side view drawings nor anything else other than some pictures of the construction of Holly Lyn.

Hey, who said life was easy? Let’s do it…..
Last edited by Reg Hinnant; May 03, 2011 at 05:07 PM. Reason: spelling
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May 03, 2011, 05:12 PM
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I paid Ronnie for the equivalent of plans and shortly I had mold shape drawings (hull shadows) and a CD with a few construction and finished pictures.
I figured I would build in the same manner as they do full size. Strip plank using Poplar for the hull & Spanish Cedar for the trim, decks & interior.
This is what we hope to end up with.
May 03, 2011, 05:43 PM
Just call me "Mo"
mogogear's Avatar
I always love a torpedo boat stern...as I am making a torpedo boat destroyer ( with appropriate stern) myself

Good luck Reg--- get that build thread going
May 03, 2011, 05:46 PM
Grumpa Tom
Kmot's Avatar
May 03, 2011, 06:18 PM
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Get the build on?? OK
First thing was to enlarge the shape drawings to a suitable size.
His ˝ hull model is 24” so I enlarged the mold tracings (shadows) 200% to get a 48” hull length and 13” beam and that comes out to 1/6th scale from the full size.
I set up the templates on 2 lite ply pieces to cut Identical halves to make each bulkhead. You can see the beginning of all my notes to myself about corrections already.
May 03, 2011, 06:21 PM
Registered User
I got the keel lines by using the inside top of the molding shapes lined up with my datum line. I marked the building board with the correct mold spacing & marked the bottom of each mold. On the building board I worked out the bow & stern shape using the pictures from Ronnie as a reference.
May 03, 2011, 06:25 PM
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Then I set about to build a builders frame as used in full size building. I used the same method for the bow & stern construction as Ronnie did.
This is pictures of what we will be building to scale.
May 04, 2011, 12:36 AM
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First I separated the 2 shadow halves from each other and made up a frame work that positioned each shadow the correct height above the building frame.
May 04, 2011, 12:44 AM
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The building frame is glued down to the MDF building board and we are setting up each shadow on the correct station position.
May 04, 2011, 01:35 AM
dunc2504's Avatar
I will be waiting for the next part !
May 04, 2011, 07:29 AM
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-kno3-'s Avatar
Finally this secret build has been unveiled. Don't ask me how I know but there will be some pretty impressive hull pix to behold, soon, I hope :-)
May 04, 2011, 12:31 PM
made of fire and pop rocks
bgnome's Avatar
Oh yes, I've been waiting for this build to go live!
A very worthy subject, and her big sister is stunning on the water.

I took video of her under way, I just don't recal if I posted it anywhere. I need to see if I still have it.
May 05, 2011, 04:35 PM
Registered User
Hummmm….I have Dunc in England waiting for the next part, kno3 in Germany implying that this is a secret build possibly a conspiracy to show a build while it is already done and bgnome waiting for the build to go live. Guess I should get on with it.?
Getting all of the hull shadows aligned and using a fairing batten to check the flow of the hull lines showed adjustments needed in height of 3 shadows & several adjustments on hull sides.
If you follow any of the threads on the forums where they are building full size canoe's or boats you will find that this is a common process no matter how they came up with the shadows lines.
Last edited by Reg Hinnant; May 05, 2011 at 04:40 PM.
May 05, 2011, 04:49 PM
Registered User
The next part will be laminating up the inner keel (in place on the cutouts in the shadows.)
The inner bow frame will be laminated in place after a bow former is cut to shape. The bow former will be like a shadow/mold shape only running fore & aft. It will not be part of the boat.
The stern frame will be a solid piece of spruce cut to shape and temporally attached to the #11 shadow/mold.
You can see what I am talking about in the 2 pictures of the full size construction above in post #7
Last edited by Reg Hinnant; May 05, 2011 at 04:53 PM. Reason: spelling
May 06, 2011, 10:06 AM
Registered User
-kno3-'s Avatar
How long are you going to keep us waiting for some planks on the molds? I have a feeling (backed by some rumours) that you intend to keep feeding us one build pic every few days, while the finished hull already sits on your desk for your own selfish enjoyment

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