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My next project is a scratch build of a Wianno Senior. Lots of pictures on Google, but had to get permission from the Wianno Senior Association for the build. They had concerns if I was making them on mass or what my intentions were. They sent me some old faint drawings first which I was able to redraw using a magnifying glass. Then they sent me this PDF which I dropped into my CAD drawing bringing to match my drawing. It will be built at 1”=1’ the model 25 1/2” length and 8” beam. Fascinating history on this 1914 Design look it up.
Scratch built at 12th scale from pictures and profiles of the internet. The boat was originally built in Sweden a class of fast military assault craft originally developed for the Swedish Navy by Dockstavarvet Speed: 40 knots (74 km/h) Draught: 0.8 m (2 ft 7 in) Length: 15.9 m (52 ft) Overall; 14.9 (48') Complement: 3 (two officers and one engineer); Up to 21 amphibious troops with full equipment Armament: 3 × Browning M2HB machine guns; 1 × Mk 19 grenade launcher; 4 naval mines or 6 depth charges . The Model I was attracted to this boat due to its great performance and maneuverability, this was mainly due to the use of twin water jets as the main propulsion, this is a trade off with efficiency. So my start point was to collect as much information as possible about the boat this involved collecting pictures and profiles of the craft from various sources. http://www.dockstavarvet.se/products/combat-and-patrol-boats... Eventually I found some plans of sort :- http://laurell.today/boats/combat/plans.html My Dad was a boat builder in the days of wooden yachts, and had showed me how to make plans and frames from a line drawing. I went about this first by creating a prototype about 24 in long out of light ply. I then created full size plans of the model to be made. Pictures of small prototype finally painted plain green. The Main model Used my computer to print out the frames onto paper, cut them out and used them as templates for the ply ribs. The construction was simple chine style, with 1.5 mm ply. I tried to build jet drives but failed to produce a effective unit. So reverted to propshafts which worked out well with better control and the bot can spin on it own axis by putting one engine in reverse the other in forward and adjusting the twin rudders. That it for now, hope it was of some interest
This is not a build but a modification of a cheap Chinese boat just for fun, I got a bit bored of scratch building projects as they take so long especially as I am not retired yet. The NDQ 757 Coastal Brother 1:25 Radio Controlled Racing Power Boat cost about £25 from Amazon. These boats have a basic 27mhz radio and two 380 type motors which have forward and reverse and you steer by powering one motor or both for straight ahead. I bought two of these boats as they are light and about 24 in long, one to convert/upgrade radio, esc and brushed motors the second was to upgrade radio, esc for brushless motors. The brushed motor version I put in two higher rated motors (390) with cooling fans built in, but same motor diameter but longer body I had to modify the mounts, kept same couplings and shaft/propellers. I did remove trim tabs (fixed) and replaced the straight running adjuster for a racing rudder. The brushless version is the same but has brushless motors 2x 2845 2600KV sensor less Specifications: KV(RPM/Volt): 2600KV RPM: 50000 Max Current: 42A
[Score: 7/10] 52"/5000g CB90 Capable of 8mph and a runtime of 25mins Twin Propellors (3 Blade 45mm) Direct Drive to a Graupner 700 Turbos (3 Blade) Powered by NiCad (8.4v) 4Amp/h Batteries Controlled Through Mtroniks (25Amps) ESC - Comments: Scratch built at 12th scale from pictures and profiles of the original boat, hope to upgrade batteries to 11.1v lipo. The boat was originally built in Sweden a class of fast military assault craft originally developed for the Swedish Navy by Dockstavarvet The CB90 is an exceptionally fast and agile boat. Speed: 40 knots (74 km/h) Draught: 0.8 m (2 ft 7 in) Length: 15.9 m (52 ft) Overall; 14.9 (48') Waterline Builders: Dockstavarvet, Gotlandsvarvet In commission: 1991 Complement: 3 (two officers and one engineer); Up to 21 amphibious troops with full equipment Armament: 3 × Browning M2HB machine guns; 1 × Mk 19 grenade launcher; 4 naval mines or 6 depth charges
Hi Andy I am interested to read about your plans for a dog boat as I am thinking of doing the same (when my Thames steam launch is eventually finished....!). One reason that I am considering this is that my headmaster, when I was at Maidenhead Grammar School in the 1960's, was a former skipper of MGB 658 and I am lucky enough have autographed copies of two of his books. "Motor Gunboat 658" is a fascinating read if you haven't already come across it, as is "Dog Boats at War" with plenty of useful information and photographs - just two of the books by Len Reynolds DSC. (He rose from Navigating Officer to Captain during the war in the Mediterranean theatre and served on MGB 658 from its commissioning in 1943 to the war's end.) Apologies by the way if you already know all this! Two questions if you don't mind - are you going to do a complete scratchbuild from plans or complete a fibreglass hull, and which/whose plans are you using? This may help my own decisions later on. I have seen that there are plenty of the appropriate weapons in 1/24th scale on the Deans website which should make life easier with the fiddly bits! Very best wishes with the build. Smiffy
Hi Gerry, welcome aboard 👍 Don't mind some of our crustier Fleet Admirals😉, they mean well and have a wealth of knowledge 😉 First some basics (and forgive me if I'm preaching to the converted but the query was a bit bald to say the least!)! - 1 What experience do you have with RC boats? 2 Brushed or brushless motors? Are you aware of the pros and cons? 3 Battery: are you thinking NiMH or LiPO? Are you equipped for LiPOs, i.e. appropriate charger? 3 I assume you mean the ELCO 80 foot Patrol Torpedo Boat (PTB)? Which at 1:32 would give a model of around 30 inches. Please confirm or let us know what original type the model should represent. 4 Are you scratch building from a plan, or from a kit? If a kit which one? Maker? Sorry for all the questions, but it's like computers; nothing in = nothing out!🤔 Some general rules (I know, rules are made to be bent til' they break!😉) If you go brushed motors there is a neat dual ESC + rudder mixer on the market where you can also connect a third separate ESC for the centre motor, to give that extra OOOMPH at Full Ahead 😊 If you go brushless the basic rule is props no larger than the diameter of the motor. And use an out runner, good torque and SHOVE! Inrunners are mostly for the fly boys 😉 Guideline: last year I bought a 28" LoA model of an ELCO 80 footer PTB from another member. It's fitted with 2 x 28xx brushless motors and 30mm 3 blade screws and 2 x HobbyKing XC-10A ESCs. The builder who sold it to me said it is 'almost uncontrollable'! Whatever you do have fun with it, but if in doubt ASK, before you dump money in the boating lake! 🤔 Good luck and best regards, Doug 😎
As the title says this is my first build of model ship, I always wanted to build so no time like the present. I am building it from scratch as i was told that it would be easier that way and there are no kits available for the ship i wanted to build. Having fun doing it anyway and so far so good although it will take a long time to finish but its a labour of love so i don't mind that too much.
This is another scratch build fishing boat. The hull is a models by design Cygnus GM33. 16th scale. This one will be a pure trawler. I am going for an aft wheelhouse this time! The prop shaft and rudder have been purchased but all other running gear will be shared with Emily P III.
It’s taken most of the day cutting out the formers and sanding to something I am remotely happy with, that’s liteply for you. I expect once I get to the cabins that I will also scratch build with better quality wood.
[Score: 8/10] 48" MV Balmoral Capable of 2mph and a runtime of 45mins Twin Propellors (4 Blade 20mm) Direct Drive to a MFA RE 385 x 2 (4 Blade) Powered by Lead Acid (6v) 4Amp/h Batteries Controlled Through Mtroniks Viper Marine 25 ESC - Comments: Scratch built on a GRP hull (Models By Design) can be fully iluminated and build as seen in 2013
[Score: 8/10] 55" PS Waverley Capable of 2mph and a runtime of 45mins Chain to a MFA Torpedo 500 Motor and Gearbox Powered by Lead Acid (6v) 5Amp/h Batteries Controlled Through Mtroniks Viper Marine 25 ESC - Comments: Scratch Built on a GRP hull using a geared motor and plastic chain to drive two paddles. Took 5 years to build and she is 10 years old. She was built as seen in 1973
Just had a quick look and there are some good detailed plans. You will need some software to scale up the drawings to the scale required but this is possible. Well worth a look if you like scratch building. Thanks for sharing