Mirabell61

little update...... trust that those who know how a "built in mistake" looks at you for all times after, I could`nt stand that faulty rigging detail any longer..... here comes the correction... Nils as before...., lift and sheet line connected by mistake corrective action, new portside mainyard lifting line installed

Michael, I have found this humble boiler design drawing in my old files, it shows the position of the six wrapping 8 x 1mm tubes wich cross (silver soldered) through the large 28 x 1 mm flame tube Nils

Michael, at time of build I did`nt have any boiler-book plans or so, my thoughts were around what would be a goog heat efficiency in compact size to fit in to the boat and not being too heavy. The complexity is necessary for continuously holding 2 bars at discharge at that small size. I just looked up a scots boiler now after reading your comment, and yes yòu`re right, I found a cutaway picture of a "Hurst series 200" scots boiler on the web , which I think may be copywrighted. Therefore no pic here. Difference to my boiler are the missing extra "instant steam tubes" , as you say I wrapped around the other tubes and the super heater device I have installed Nils

Oh, thats lovely John, ist a place I could spend a Holiday...... beautiful work Nils

Hi John, thanks for dropping in I like your Islander model in 1:87, it Looks like a waterline model for arranging with H0 Train scenery, and very well done. I remember the Billing Boat Bohuslän build and at the time of build I unfortunately could`nt afford to by the Fittings kit as well, so all that was self made and there was some bashing to the kit anyhow, but I had fallen in love with the lines of that old Lady as well as the nostalgic 1914 look, For what I recognised from the new Bohuslän kit (here on MSW), trust you are right, building from kit would probably turn out as a real "kit bashing Party" Nils

thank you Carl, I know Carl, its such a long time ago that this project had its high point, but at the tme of build I could hardly wait to simulate steam flow by compressed air and was totally pleased that it worked as designed and planed, after a few minor cam position adjustments Nils

unfortunately no Patrick, the boiler still is unreparable (must be new built), and the motor needs complete overhauling Nils I ripped open the boiler outer skin to see where the leakage is (Unreparable) here a view into the firing tube, there the smaller cross spicked instant steam tubes can bee seen inside this is how the motor fits into the engine room here the boiler with removed wooden cladding insulation

Introduction : This project has been completed already in the years 1984 / 1985, when I was still a young man. I had the intension of building my own designed steam engine for a model ship. A regular steam engine with crosshead-guides and Stephenson reversing control device, was too complicated to build, in lack of neighther lathe nor milling machine (still do`nt have….). So I decided to design a steam-motor with a minimum on moving parts, and yet powerful enough to propell an appr. 1100 mm long RC controlled ship model. And the driving challenge was also to see if I could do it anyway…… Current status : After some years of perfect performance, the boiler became a hair crack leakage in one or two of the inner heating tubes solderings, that unfortunately could not be mended without destroying the boiler. So neighther ship nor motor had been moved since. I wanted to rotate the motor the other day by trying to rotate the crankshaft but all was blocked somewhere, probably the pistons are sticking to the cylinder walls. Shall have to dismantle everything completely for overhaul, and build a new boiler if I want to have fun on that behalf again. Fortunately the was a raghther short little super 8 Kodak film made of the model travelling on the lake at full steam in those wayback years, the film in miserable quality, but at least a document of a successfully completed project. I`ll try to put that film in a little video here on MSW in this log later on. Some of the pictures I found fortunately in my photo-archive and scaned them in, and was myself surprised that I even had pics of motor complete, and boiler in the building stage. I thought this may be of interest for the one or other fellow builder here at MSW. The ship itself is still ready to be launched at any time, only the prop has a bit patina on it The ship Model-length 1090 mm Steam powered, gas fired, RC controlled, fictional version river tug “Lorbas” in nostalgic look Model Build year : 1984 / 1985 Ship is POB scratch design, self drawn lines, ply frames and diagonal planked with balsa stripes, Hull coated with glass-fibre rowing cloth and epoxy resin Removable deck housings and many maintenance opening hatches and doors, and ventillation openings for the boiler- and machine room large self made 80 mm 4-blade brass propeller RC control Simple oldtimer 2-channel radio-controller, Make “Robbe” and on the ship two-channel receiver and two servos (one for steam reverse valve, stop, foreward, aft) one for rudder port / stb. One power pack comprising 4 x 1,5 V mignon Batteries. I`m not allowed to use this RC equipment any more due to national postal radio frequency regulations The Engine Self designed Six cylinder Steam motor in Vee-6 design, for superheated steamflow, with direct piston rods to crankshaft, ball bearing crankrod head-bearings, each cylinderhead with common, horizontal working slide cam control bars, manifolds for steam inlet and steam outlet (reversible) Steam reverse valve (for swapping inlet / outlet channels with RC servo function. Motor designed for 2 bar constant steam backpressure when running at 200 RPM in direct (quick disconnectable) coupling to propshaft Idle unbreaked motor runs up to 3000 RPM, if control cam positions are set correct Model speed like modest walking pedestrian Lubrication by means of oiler-device in live steam line (high viscosity steam engine oil) Piston rings made of Teflon in circumferential pistenring grooves Manifold gaskets made from Viton O-rings (heat resistant) Elbow- and t-fittings and flanges silver soldered, tubes soft soldered in Materials: brass and stainless steel and commercial available bearings Six Cylinders 10 mm diam. X 10 mm strokelength Due to the six cylinder arrangement the motor is capable of starting rotation at any crank position The boiler It was my aim to create a powerful lightweight design for firing with butan gas burner and gas from commercial, exchangeable cylindrical cartridges that fit into the boat (like used for refueling cigarette lighters). Function: The boiler has one central flame-tube cross-spicked through with 6 smaller instant steam tubes that mount into the area of the upper steam collector dome. The hot gas of the flametube then reverses direction in the outer end-camber, that also contains the superheater tube coil and from there 13 heating air tubes lead back through the boiler, into the opposite chamber that takes up the chimney tube (inner liner of the ships funnel) The waste steam tube is connected to the inner chimney liner in order to burn out the micro-oil-fume of the exhaust steam in the upstreaming hot air together with the firing exhaust. (avoid lakewater pollution !) The safe running time with one distilled boiler-water filling is 20 minutes The boiler is capable of providing constantly 2 bar backpressure at ships full speed The boiler is equipped with a stand, wooden plank cladding, a blow off safety valve, a pressure gauge, a main steam valve, an oiling device, a water level indicator, a draining point, and a heat exchanger for pre-heating the expanding butan gas from the gas cartridge The boiler is mounted to a common aluminium baseplate that also takes up the motor mounting bracket and the burner mounting bracket. To fire up the boiler, the flame tube is heated with a external (more powerful) gas tourch outside the ship. When reaching 2 bar steam pressure the complete baseplate is set into the ship from above Materials: Boiler complete from stainless steel, silver soldered, pressure tested with 4 bar Enjoy...... Nils

Your fine comment is much apprrciated Popeye, thank you very much Nils

Thanks very much Piet, Nils

smart idea on the Skylight Wefalck Nils

Thank you for your appreciation Hartmut, its fun building this one, and the rigging is quite challenging but I`m quite pleased so far Nils

What a great decoration Ed, I guess you are Holding the breath when you are applying with the fine brush, fantastic look ! Nils

beautiful metalwork on the stove Bob, that also proves a good idea to go for the module build mode, you have fine access to everything.... Nils

Merci Michel, thanks for dropping in, glad you like it Nils

beautiful Detail Peter, very nice quarter aft shot, all fits great into your Color scheme Nils

Thanks for your Kind words Bob, this one is calling for most concentration, because there have been so many of my ideas and experiences inplemented, that the plan set stays on the shelf most of the time. Many ideas come to me when I do my daily morning walk with the dog, On the other Hand there are so many good inspirations by MSW Posts of fellow builders as well. Lucky for me I have the time to do this modeling since my retirement, and it Looks like it will be a two years Project after all, like the others, if completion can finalize in Summer 2015 Nils

Great looking Swan Class Peter, Trust the end of this building yourney is already in sight, in all a wonderful building documentation and Inspiration for others Nils

beautiful Lee, clinkered port side....., that will be a treat... Nils

Thank you very much B.E. , when looking at the close up yard tip, I recognized that I had by mistake tied the topsail sheet, one turn around the upper lift line. Its not obvious to see, for someone who does`nt know, but it looks at me now. As the line-ends have been snipped off already, I Would have to put new lines on to get that one mended. Decision : leave as is... Nils ....not free from mistakes.... Skylight simply glued to deck, and tabernacle tied down on deck beginning to clean up the line ends, all belaying places on gallows posts rail occupied now close up at the port quarter helmsman working place