Hi,
Here are the first parts of my next model, a small Deutz 4-stroke field loco for narrow gauge (600mm), at 1/13.5 scale, for 45 mm rails, from the images above.
I especially liked the transmission, and thanks to the help I received here on how the gearbox works, I was able to reproduce it faithfully enough, with the dog clutch system for both directions and the clutch on both shafts, fast and slow; the latter is done here by friction and cone instead of the spiral spring (Schlingfederkupplung), a bit too complex to miniaturize.
and I added a reducing stage because my engine will not be able to run at the speed of the original, 300-400 rpm !
This is not the chassis of my future loco, but just a first test "to see" if everything works well with recycled loco components...
I put a small dc electric motor and a battery to animate the whole stuff, the power varied from 0.5 W when idling to 0.8 W, for fast forward.
The whole thing is quite satisfactory, except the PLA 3D printed dogs, fried after these tests...
I still have to put a steering wheel for the speed clutch and a lever for selecting the direction gear to keep these couplings well engaged during the ride.
Then the engine, a small 4 stoke (about 2cm3) with long stroke, will be also quite interesting to make, the rest of the model being more conventional modelling!
