23 Posts
7 Followers
126 Likes
Lorraine 2
After the first attempt at Lorraine (1) from the Model Boats Plan MM 512, which ended in a disaster, the main frame/hull warped, I did not clamp the keel down on the assembly with glue, think the expression is " Like a dogs hind leg". I did drop it into the water butt and let it soak, then clamped it all up, but after the dry-out period it all went back to a disaster, so it was scapped.
Lorraine 1 was a Round Bilge type hull, then while pondering the drawing i noticed there was a second set of illustrations showing a Hard Chine construction, and as had not indulged in a hard chine unit for some time, decided to give it a go. Some 5mm ply was obtained from the local emporium ( JotiKa ) and we set off, tracing from the plan, and then transfering to the timber. I was asked why i over drew or extended the profile lines of the bulkheads/formers, this is if one uses a circular saw, it's far easier to pick up on the extended line's than guess the ailignement to the saw blade, this can apply to hand saws of course. The Keel was fabricated from 2 x 5mm layers of ply. Tend to cut one out layer out first then locate and bond them together, using the original cut out as a templet, they were bonded with Alphatic glue and brass pins, then left under pressure on a flat surface over night, using any old bits of weight that could be found, ie: old Lead Acid battery's keel weights etc: ..
muddy
4 years ago
22 Posts
5 Followers
102 Likes
My Susan
My Susan. Offshore Transom Fishing Trawler. Model Boats Plan No: MM925. This one started off as a "Chuck it on the car seat Jobber". Not to big, but a handie size and with a roomy interior. Large deck opening which i like, makes for easy access to all running gear and radio. On the plan it's main construction is of Balsa wood. But I as always foolishly decided on something different and went for my usual of Ply Keel and Bulkheads with planking, approx 6 x 3 mm..
Making constructional modifications at this early stage can lead to disastrous results and it always open's a big if not gigantic can of worms. ( I wish i had listened to these old wise words ).
Usual start for me, trace all the bulkheads and keel onto a tracing paper of some sort, i tend to use drafting film as it's reusable and if traced with a pencil, the tracings can be rubbed out and the film reused. If you have a long keel etc: then just "Selotape" with about an inch overlap, i have done this up to a keel length of 56 inches with A3 size tracing paper. The using a "pricker" as in something like a dentist probe or a nobed pin set into the end of a piece of 3/8"dowl, its like making up your "Join by dots" pricking through the drafting film onto your selected timber. Then the exciting bit follows, joining up all the marked picked holes with a pencil or ball point pen, ready for the saw. Make sure you holes are well pronounced as it may be hard to find when you start to Join the dots. ( I,m not laughing honest ). Now its time for the saw, and join the Rabbits bedding society, Making sawdust. Once it has all been cut the keel and bulkheads, time for a dry fit, and alignment . If it all looks as should be, then you can open or remove the innards of the bulkheads, not forgetting to make up the prop shaft doublers in the keel. I always tend to start at the Bow end and fix the Breasthook and first couple of bulkheads to make a good starting point, leaving it clamped up overnight.
muddy
3 years ago
8 Posts
1 Follower
29 Likes
Elizabeth
After a long lay-off, not requested or wanted. The call of the sawdust was here again.. Looking back at the Gentlemans Cruiser, i decided to start afresh with its sister ship, Elizabeth.
She is a hard chine construction so was hoping to get her to water in record time. But the gremlins set in when the hull had to be skinned.. The bottom skins did not want to play ball, or maybe it was me on a not so good day, but persevered and then planked the bottom in Obechie 6mm x 3mm, and then fitted the side skins vertical grained, and i must admit they fell on, no grunting and moaning with the hull frame in a half nelson trying to bash home a few pins, it was like hanging wallpaper..
The basic hiull is not as drawing with built up bulkheads but the keel and bulkheads are 5mm ply. Chines are 3/8" x 1/8" spruce and Obechie, obechie to the outer edges, easier to work.
muddy
4 years ago
5 Posts
0 Followers
21 Likes
Gentlemans Cruiser
Started on the upper-works/cabin. Ring saw came into its own again. Followed up by the small mini drill, similar to a Dremil but with a bigger chuck which is handy, using Dremil 1/2" drum sander to clean up the window inner edges. Used 1.5mm ply for the cabin sides as they are going to be veneered, found a pice of veneer under the bench it nearly had roots, and i think, think, it's Teak. This was all glued up under weight using a PVA glue, probably the one in the pics, but an Alphatic. then when glue well and truly dry, Using a No10 scalpel blade to remove the innards of the window frames, and a quick swish with some fine grade sandpaper, not sure about any window frames as yet. ( to many windows for me ... ! ) Regards Muddy....
muddy
7 years ago
5 Posts
3 Followers
27 Likes
Speranza 01
Started on the Stringers and Chines, some of the stringers are Spruce, 1/4" x 1/4" , one cracked on the bow curvature, not immediately it was glued and pinned, but about an hour after, should have laminated these spruce stringers as in 1/8" x 1/4" times 2. Another one has cracked since but they are repairable..
Mixed up a weak solution of PVA and water and painted the rest, hoping this will soften them up and be more pliable. Started on the transom, this is angled with a sharp centre line, but there was a lot of off cuts of Obechie lying around, so it was planked with a curve, first Modelers License applied. A few more dry fits and the bow and transom were assembled up, using stringers as alignment tools, anything will do in these instances even strips of ply. Some of the upper-works combing has been fitted around the transom area. Muddy....
muddy
4 years ago
2 Posts
0 Followers
4 Likes
Muddy's Lorraine
Because of availability ply was used for the keel, 2 x 5.5mm bonded together giving 10mm thick keel. The Bulkheads were 5.5mm ply. Because of a (foo-Parrr ) a breast hook was made up to bond B, B2 and B3..
muddy
8 years ago