Web series / Amateur construction of a Marauder, hull flanging

After the frame is in place, Etienne continues to build his Marauder by planking the hull. The large plywood panels are now in place, with a special feature: the construction of a moulded wooden chine.

Scarves for panels

The 5.00 m long edging panels are assembled by scarfs. I must indeed assemble 2 panels in the length. The machining of the scarfs was done with a belt sander by superimposing the two offset panels. The gluing was done in the living room (it is cold in the workshop for epoxy resin!). Pressing was done with a home-made press.

Maraudeur construction amateur
Marauder amateur construction

Scarfs made with belt grinder

Maraudeur construction amateur
Marauder amateur construction

Setting up for gluing the scarves (in the living room!)

Maraudeur construction amateur
Marauder amateur construction

The press for gluing scarves

Boarded, keel and chines

The installation is easily done in 2 steps as always. Dry presentation, temporary screwing then gluing. I have now mastered the application of the resin with the syringe, although I use it a lot.

Maraudeur construction amateur
Marauder amateur construction

The solid wood rails are in position, ready to receive the plywood planks

Maraudeur construction amateur
Marauder amateur construction

Laying the 2 edges in a sheet of plywood

Maraudeur construction amateur
Marauder amateur construction

Keel well assembly

Maraudeur construction amateur
Marauder amateur construction

Screwing before gluing

The bottoms and sides are the easiest parts, they are large elements made of 6 mm plywood in a single thickness. They are laid longitudinally by temporary screwing and then gluing. We used the large-format medical syringe and the coating knife.

Maraudeur construction amateur
Marauder amateur construction

The chine is made with 2 layers of 3 mm plywood

Maraudeur construction amateur
Marauder amateur construction

Superimposing the chine

Maraudeur construction amateur
Marauder amateur construction

52 sheets of plywood must be traced and cut on each side!

Maraudeur construction amateur
Marauder amateur construction

The chine is glued

The chines are the most curved parts of the border between the bottom and the sides. To make them, the architect foresees that they are made in 2 crossed layers of 3 mm thick CP. Small pieces of CP must be laid, which are cut one after the other. They are traced by superimposing the pieces, then cut out before being glued definitively. The operation must be repeated to make the second fold, which is crossed with the first one. This is a big job that will require a lot of time and patience. It took me 1.5 months to border the whole hull.

The keel planking is made by stitch gluing: this involves dry joining the CP parts by sewing before they are glued together. I chose to "sew" these parts with pieces of copper wire, so there can be copper left without fear of damaging the weld afterwards.

Maraudeur construction amateur
Marauder amateur construction

The cradle is designed to tilt the boat and facilitate the work

Stratification

As soon as the whole edging is done, it must be laminated, I use 200 gr/m² glass cloth applied using the "wet" technique. The work must be done on surfaces close to the horizontal to avoid the resin to flow. Not easy on a boat hull! So I will progressively tilt the hull as I work.

Maraudeur construction amateur
Marauder amateur construction

Glass fabric for solidifying the shell

Luckily the supports are designed for this and the weight of the set is not too great to tip it over. So I can do it easily. During this lamination phase, I use a lot of nitrile gloves and my work clothes suffer considerably, the workshop floor is also impregnated! This is not the most interesting phase..

At this stage, I laid 15 m² of glass cloth and consumed 12 kg of resin. And it's far from over..

Maraudeur construction amateur
Marauder amateur construction

Reversal

I should have done the first paint job before turning over (at least the primer coat), but my impatience didn't allow it, I was anxious to see the result, the boat right side up. I installed 2 ratchet straps on the frame of the room, it's not ideal, but it does the job with a few hands to help. Once in the right position after removing the bulkhead brackets, the central beam is extracted.

Maraudeur construction amateur
Marauder amateur construction

Hull lifting support installation

Maraudeur construction amateur
Marauder amateur construction

The Marauder is right side up!

Maraudeur construction amateur
Marauder amateur construction

The beam for the construction site is extended from the rear as shown on the plans

The extra manpower is there to share the pleasure of seeing the machine right side up. I can better measure the number of joints to be made between the stringers and the planks. At this point, I already have 300 hours of work. It seems that there are still as many to do..

Maraudeur construction amateur
Marauder amateur construction

Contemplation of work well done

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