The first photo about the ready-made first model. If you want to study it in
detail, you find here a
very large photo (82kB) about it.
This is the same picture with brown background. You can study how the color
photo- and print technology falsifies the original colors. The loco should
have the same color as on the picture above and the photo was taken using
the same light and camera setup. If you want to study it in detail, you find here a
egy very large photo (66kB) about it.
The first model's profile. If you want to study it in detail, you find here a
very large (97kB) photo
about it. I find it resembles well to the
original loco.
The fireman side of the model.
If you want to study it in detail, you find here a
egy very large photo (63kB) about it.
The right side profile of the model. The brake rods on the tender are appr.
1mm too deep. If you want to study it in detail, you find here a
very large photo (90kB)
about it.
The loco front. The close picture reveals the smallest errors.
The loco with coal on the tender top.
The loco from the back. The firebox controls are well visible.
This model represents a newer version of the MÁV Class 326 loco. It was built
with longer "American" smokebox, flat steam dome and sanddome. It is equipped
with a single action Westinghouse air pump and air tanks on the footplates.
The fireman side. The brake rods are 0.5mm higher on this model,
but still perhaps a bit too low.
The side view.
A closer photo of the engineer's side.
Due to the light source position the builder's plate and numberplate is not readable, but
on another picture
you can see even those.
The fireman's side. The tender is more detailled than on the forst model. The bearing covers
are etched pieces and the rivet bands show well the dual rivet rows.
A closer view of the fireman's side.
The model from a low camera view, as the original was observed by a usual man.
The rail was not as bent as on the picture, this is a distortion of the camera lens.
The second model from the back. The coal was prepared more rough, than on the first model.
The front side.
"Our company's
logo". Both models RTR, unlike on the
old picture.
Both models on a "station".
The first one was painted using mat color while the second one with semi glossy paint.
The "station" side view.
Both models from the back.
On a detail photo
you can observe the firebox handles of both. They also are a bit different!
The first loco without painting. The rivet strips and rivet rows from the
tender and the tender bearing journals are still missing.
The first loco from another view. The tender top will be filled up by a "pile
of coal" with a lead casting below.
The loco from a usual viewing angle. The minimal operating radius is 22"
(550mm). Below this the first and third driver will touch the external frame's
internal surface.
The first picture of both Class 326 steamer model together - without tender.
The right one is the model of the old prototype, with short smokebox, sandbox
on the footplate and old style dome with rings. The left one is the model
of the newer prototype, with long, "American" smokebox, sanddome and simple
dome. The overall structure is similar. Even if it is hard to believe, but
the left side model is only 2mm (0.08") longer than the right side one. The
stack slanting is not intentional, it was less remarkable on the model than
on the picture. The newer model, the left one still lacks of the handrails,
the whistle and the feedwater pipe with the checkvalve. It also will
have more tubing around the boiler, because of the air brake rigging. The
air reservoir will be mounted on the footplate.
The frameside of the Class 326 steamer's tender. The large holes are the
openings, they will be cut by
piercing saw. The pattern
of the small, 0.4mm (0.016") holes, well visible in the
zoomed picture, are the
rivets. After cutting out the frameside 0.4mm diameter wires will be glued
into these holes and they will be grinded flat.
The framesides of the loco. Two pieces only drilled using the small
CNC machine and the openings
filed, while the other two pieces are already filed to shape.
Picture showing the first manufacturing process of the rods. First drilled
by the CNC machine, then cut out and filed to final shape.
Machining the new fluted rods. The flutes were made first using the small
CNC machine, after this
the holes for the crankpins were drilled and here the rods are already ascribed
for cutting out the shapes.
On the second model the loco's electric current collectors do not touch the
wheel flanges, but they contact an isolated nickel silver ring on the tube
axle. The ring is connected to the flange by a thin wire.
The cylinder blocks with the valve box. The valve rods don't move.
The crosshead guides with the crossheads. The connection at the end is a
temporary piece, it serves for keeping the correct distance between the crosshead
guides. After soldering the crosshead guides to the yoke, they will be cut
off.
The stack and the dome. They are turned brass parts.
The firebox, made from 8 pieces. It has no bottom and a hole for the longboiler
screw. The structure on the top serves to fix the cab parts and the roof.
The smokebox of the second loco (the first one has covered front). the hole
on the top is for the stack.
The partly mounted boiler of the second model, with long smokebox.
The soldered frame with mounted cylinder boxes. The right side sandbox is
still missing from the footplate, is was glued after mounting the boiler
to have the exact position.
The cab floor with the steps and the injector.
The reverse lever inside the cab. This part was not etched, but made
using piercing saw and file. The prototype loco was equipped with a dual
reverse lever system: there was a large hand operated lever but also a set
screw. The model shows this interesting feature as well. The worm was made
by turning a thin copper wire around a 0.5mm brass rod. The match was
put there to give a feeling about the size and proportions.
The cab of the second loco.
The main parts of the second loco. The first one 's cab front has a
parting line in the center.
The first model's frame and boiler (with the second model's dome).
The first model's frame, boiler and cab mounted (with the second model's
dome).
The cab inside with fully mounted firebox fittings. The plate below the floor
is the tender connection.
Another picture of the firebox backhead. A few accessories are however missing,
like the in-cab safety valve and the checkvalve from the boiler side.
The tender drive. The flywheel is removed for the better visibility.
The small motor drives a longitudinal wormshaft that is located below the motor and
above the axles. Two worms drive directly the first and third wheelsets.
The center wheelset is not driven, but its axlebox has oval hole allowing
1mm (0.04") vertical movement. All wheels have current collector wiper though.
The both grey blocks besides the motor are lead blocks. The other lead block
(see below) comes on the motor top.
Casting of the lead weight for the tender. Its shape forms a pile of coal.
The master was made from particle board sheets and the mold was made from plaster.
Several molds were made as it was not sure if the lead casting can be removed
without destroying the mold. The molds were first put in the kitchen oven
for a short time to remove the christalline water that might cause serious
problems when casting the lead. The lead was heated in a kitchen ladle (left
side) on a gasoline camping stove.
The lead casting for the tender weight. It is on the top of the tender and forms
a pile of coal. After painting some real coal will be added to the top. The
casting became too thick, thus the bottom should have been milled out using
the CNC-Mill to make place for the
motor and the flywheel.
Here are two printed test layouts for the etched parts of the Class 326 loco
model. No photo procedure was used, but the layout was printed on a contact
sheet called Pnp-Blue® and ironed directly on the brass surface.
The numerous unsucceeded experiments with the PnP Blue® sheets.
This shows well: "Until you find your handsome prince, you should kiss many nasty frogs".
The "rivet" bands and the window frames of the second model were made
using "real" photoetching technology. The difference is well visible, mainly
on the rivet bands.
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This page was updated last time on 7th September 2002
© János Erö