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| Dumas PT Boat (PT105) 1:30 scale by MOG | ||
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Moderators: Winston, aew, bikepunk
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| Author | Post | ||
| NovaStorm |
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  Registered Member #5618 Joined: Sat Sep 22 2018, 02:33pmPosts: 383 | Nice looking lumber, gonna look good! | ||
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| Mog |
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 Registered Member #1563 Joined: Fri Apr 08 2011, 08:15pmPosts: 121 | Bottom planking with mahogany. The Dumas plans called for PVC planking using 3 pre-cut sections per side. I went with I full section preside to eliminate seams and get a better shape. Will still have to do some light filling, then plane & sand to shape.  | ||
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| Mog |
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| Registered Member #1563 Joined: Fri Apr 08 2011, 08:15pmPosts: 121 | UGLY as it looks it’s effective. I’m quickly learning sheet planking is very different than single strip planking. You have more surface to cover, since you are side planking on the frame upside-down, the top seams (bottom edge for the aft sheet is mainly straight, but the bottom edge curves as you go forward. The screwed in blocks work well for holding the bottom edge firmly in place but given the width and shape of the hull tape lots of tape works best for holding to top edge in place. Before you ask, I did think of using pins to hold it during the drying, but the edges of frames are not made of solid material and will not hold the pins under pressure.   | ||
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| Charles |
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  Registered Member #1923 Joined: Mon Nov 28 2011, 06:07pmPosts: 872 | I like your method. On a French forum one modeller did his hull (RC Tug Boat) with airplane model plywood water resistant, your are building it static so it is not an issue. A pleasure to follow. | ||
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| Mog |
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| Registered Member #1563 Joined: Fri Apr 08 2011, 08:15pmPosts: 121 | Planking the starboard side bow with 2mmX 5 mm mahogany strips. The Bottom of the bow is at a 45-degree angle with the tops at 30. The PT has sharp lines, the bow forms a fine knife edge First lesson learned here your sides and bottom sheet planking better be dead on straight at the termination point. The starboard side bottom was straight so the fairly even planking However I was slightly off on the port side so will make corrections before planking the port bottom. Given I’m working upside down its easy to misjudge the lines. Nothing a file and sandpaper can’t fix.   | ||
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| Mog |
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| Registered Member #1563 Joined: Fri Apr 08 2011, 08:15pmPosts: 121 | Roughed out the bow planking, now ready shape the lines | ||
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| Mog |
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| Registered Member #1563 Joined: Fri Apr 08 2011, 08:15pmPosts: 121 | The wood hulls of a PT had to be very smooth as the Bow would bounce and hydroplane over the water at high speed. This build is a single layer hull. Will have to remove many more small flaws than I would normally with a double hull. The bow being the main area I have rough sanded for shape. Then applied a very light layer of wood filler by hand rubbing it into the bow then rubbing in sanding dust, the idea is not to over fill just rub the plank lines and dips in first. Doing this with my hands I can fell the shape. The light rub also brings up the flaws. I will repeat the procedure several times until I get the best surface I can get.   | ||
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| Charles |
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| Registered Member #1923 Joined: Mon Nov 28 2011, 06:07pmPosts: 872 | Nice work I just love the line of that hull When I was completing the hull of my Bismarck and France I use Bondo finishing glazing putty, it work superbly easy to work with and to sand and the finish is very smooth. But and yes there always a but The fume are toxic so do it in a ventilating area and when sanding the dust is very tin and go every where so outside if possible. | ||
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| jacknastyface2 |
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 Registered Member #5239 Joined: Sat Apr 21 2018, 05:29pmPosts: 555 | I have not much experience with filler. Interested to see how you manage it. Best o' luck. Looks very good so far. Keith. | ||
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| Mog |
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| Registered Member #1563 Joined: Fri Apr 08 2011, 08:15pmPosts: 121 | To be honest I have not used to much resin in my wood working. On my rigged builds I go for the natural wood and stain look I don’t cover the wood with paint. So, this build is new territory. Two plans here I will test resin and the bondo putty, any idea how both take primer and paint? Mike | ||
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