Back to True Diesel Model Engines.
True horizontal Diesel Model Engine.
The pictures show the engine from two different angles.
I build this engine 2011, it was meant to be a true diesel model, so it was build stronger than
my previous build hot bulb engines. The base was build stronger, especially at the point where
the cylinder is connected. The cylinder head was bolted to the cylinder with 6 bolts instead of
4 bolts, the cylinder was also bolted to the base with 6 bolts instead of 4. The crankshaft was
made stronger with thicker journals, and a longer stroke at 44 mm. I thought that a longer stroke
would be necessary, for a compression ratio at at least 20 - 1, because the combustion camber
between the intake and exhaust valves by physical reasons, could not be build smaller.
I had many experiments with the engine to get it to run as a true diesel, but again with no
success, it ended up to be another hot bulb engine.
But after having my vertical A frame diesel running, I thought that I perhaps could get the
horizontal engine to run too, and so I did. I had experiments with different kind of
pre combustion cambers, and got the engine to run rather god but found, that an engine with
any kind of pre combustion cambers, needs a lot of pre heating, before starting from cold.
So the engine ended up with a direct injection system, like the one I used on my A frame diesel.
I used the same well proved fly-ball governor controlled injection-pump systemon on this
engine, as on my previous build hot-bulb engines and diesel engine. I constructed a system,
that made it possible to adjust the injection timing when the engine was running. It was a very
god help, when I was doing my experiments with the engine, especially when the engine
was started from cold.
Adjustable injection timing.
The handle pointing down in the middle at the bottom of the picture, besite the brass
governor handle, is the handle to adjust the injection timing. The handle is connected to
an eccentric in the injection pump handle. So when the adjusting handle is moved up and down,
the pump handle situated between the pump cam and pump, will move ind and out. This
will change the time when the cam hit the pump handle and thereby the pump, to a sooner or
later injection. The system enable the ignition timing to be changed about 15 crankshaft
The picture show the engine from the fly-wheel site.
Engine build: 2011.
Engine No.: 1-011.
Bore--stroke: 20 mm.--44 mm.
Fuel: Kerosene--Petroleum, mixed with 2 % mineral two--stroke oil.
Engine lubrication: Mineral engine oil with a grade of 15--40 to 20--50.
Engine cooling system: Water--cooled, using water--pump.
Watch the engine running.