In advance I'm sorry for my English. It's due to the fact that the only school I ever attended was the so-called "MAKE"
(More Advanced Kindergarten Education...)
Now seriously, I would like your advice on matter of hull-size versus enginepower and prop.
I am completing a twincompound-Lentz-steamengine which will make approximately 25HP at 200RPM, so 20HP on the prop.
Steam comes from a 7,5 square meter coalfired Scottsboiler which will deliver approximately 190kg/hour.
Because off the space I need to shovel coal the setup takes at least 4,5 meters (15 feet).
And last but not least this powerblock together with the coal wil have a weight of about 3 Tons...
Don't be fooled by the Allen keys or Allenwrenches in the pictures as they where already invented in 1911 and patented in 1936...
I guess this is not an elegant engine you can put in a charming steamlaunch.
I mean, you can of course, but only divers will be able to watch it...
On the other hand I like the looks of all the moving parts on all of our steamdriven engines.
It's always a joy for the eye to see that these parts do what they do for whatever a reason...
So my thought would be an open rivited steel hull with a plump bow and a round rear with a little cabin in the front.
It could be like the type of "little" steamers which were used to transport laborers and small equipment to the ships
or the docks in former day harbors.
The boat or ship? must be able to contain a group of passengers and will have a little cabin with a toilet,
a small kitchen and two beds.
It has to sail on canals with a great numer of bridges as on rivers with a maximum current of 6 km/hour.
Most of the time it will be stationed on a little lake where the depth is mostly 1.2 meter (4 feet) with soft soil.
Is also should be able to cross the big lake (a former sea) in the Netherlands called IJsselmeer.
With bad weather this lake has typical short waves because it is only 3 meters (9 feet) deep.
I am not planning to sail then but I would like to have her able to manage with that in a safe way.
There is a type of boat in the Netherlands referred to as "Amsterdammertje" that has most of the specific elements I like.
As you can read in the word it was used in and around Amsterdam most of the time and they still are!
They are typical for the Dutch naval history and come in a lots of different sizes.
Momentarely I am looking at a l steel hull of a "Amsterdammertje".
Sized: length x beam x berth = 13,25m(42'6") x 3,25m(10'8") x 1,95(6'5").
To be honest I am a bit everwhelmed by the sheer size of it on land.
It's estimated weight is 10 tons, so together with powerblock and coal at least 13 tons...
Can my engine cope with it in a safe and relyable way?
Or would another hulltype be recommended?
As for the prop I will have to cope with the propellercasing. I am guessing I will not be able to have enough room to have the requiered 1.06m (41") prop fitted. And than there is the low RPM of the engine. I have a chaingear 1:2 to crank the rpm's up to 400, but will I still have enough torque then? What do you guys think?
Greatings from Stoomsnor Frank
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