The photo above is of an actual English style steam launch called the "Amaryile" that is similar to the model I am building.
Build log of the Steam Launch "Alexandra", a fully functioning steam engine-powered boat model.
I became interested in how steam-engines worked and set out to build a model steam engine and a boat that the engine could power. I decided on a model of a classic English steam launch built in 1900; the model is called "Alexandra" and the kit comes from the German company, Krick; it is 35.5" long. I will make some modifications and customizations to the model which I will note during construction. Here are some photo's of actual steam launches, along with the stock photo from Krick, of the Alexandra.
I selected the Miniature Steam Models (MSM) "Clyde" Steam Engine to power my Alexandra.
MSM is in Melbourne, Australia and I selected their "Clyde" twin cylinder oscillating steam engine to power the Alexandra. I bought the engine in pieces so that I could learn better how they go together and how they work. You will need to know the dimensions and mounting points for your engine, as you build the boat, so I decided to build the steam plant during the first stage of boat construction. Youy wouldn't want to glue down the sole without first knowing the steam plant mounting hole locations. It was a very enjoyable assembly process. Here is a link to the page where I detail the assembly of the engine:
Instruction Book for the Krick Alexandra:
The English translation of the manual is missing illustrated figures along with descriptions of the first pages of part numbers. I edited the manual to add the illustrations from the German manual and also translated the parts lists to complete the English manual. Here is the updated set of instructions:
Building the model:
As with the steam-engine, I would recommend acquiring your electrical components in advance of building the model, this way you can build the model such that they will fit in the model. This is a view of the rudder steering servo which is mounted in the stern. I selected two Futaba S3004 servos for this model. One for the rudder, and one for the steam engine control.
Steam plant mounting holes drilled. I wish I would have taken a picture of the underside. I added wooden backing plates to increase thickness at the mounting bolt locations, and epoxied drive-nuts into the bottom of the sole. The drilled reccesses are when screwheads protrude from the bottom of the steam plant base plate.
Starting construction of the cabin. I trimmed the edges of the sole here to fit the hull, but I made an error and did the trimming on the topside of the sole. This part is not symetrical, it has slots cut in it for parts 69 and 70 near the door. As can be seen in this photo, I therefore needed to make some parts to fit that area. The outcome is the same, so luckily my error was not unrecoverable.