Hr1 was a fast expresstrain locomotive.
21 machines were built between 1937-1957 with numbers 1001-1021.
The last two were fitted with roll bearings. The last number 1021
is in museum traffic today.
The model is built from Kaj Wikberg's
brass- and resin kit.
The original solution for transmission
is motor in the tender and traction in the engine and a drive
shaft between these two. I decided however to replace the big
Mashima motor and put a small Faulhaber in the engine. The pictures
above are from another model.
The original worm gear and drive
shaft is removed and replaced with a new one.
The motor fits under the cabin
and is unvisible.
It's very important to ensure a
smooth operation before continueing the building.
Tender boggies.
Tender underframe and walls.
Folded underframe.
At the edges is 0,5mm brass wire
soldered.
The bottom has holes for the sound
decoder's speaker.
Primary paint and resin parts.
The underframe and boggies are
blackened with A-West's Blacken-It.
The current pick-ups are soldered
to a small printed circuit board.
The boggies are fixed with screws
going through brass tubes.
The lanterns have small 1,2mm diameter
Miniatronics' bulbs.
The wires of lower lamps go under
the buffer.
To have more weight, lead are put
to the tender.
Schematic of the decoder. The Miniatronics
lamps are 1,5V and 30mA and they need resistors according to the
picture.
Testing the bridge.
The urethan resin boiler is replaced
with a turned brass boiler to gain weight. There is also the place
for Seuthe nr. 27 smoke generator.
Assemly of the cabin.
The boiler is painted with Model
Master's Gun Metal, dome with Steam Engine Green from Finnish
Railway Museum's paint set and the nose part with Humbrol's Satin
Black.
The bridge is now black.
The cabin is first painted with
Humbrol grey spray primer, then with Steam Engine Green from Finnish
Railway Museum's paint set. Sides are made with the decals below.
