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The CAD drawing of the loco. The tender is not on the drawing but it is basically the same as those of the Class 326. This drawing was made using the original loco design drawing, thus it is very exact. It shows a loco with the first type valvegear. The boilerhead acccessories are still missing. |
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The construction drawing of the model. The black components are the wheels and shafts. The blue item shows the boiler and gear outlines. The red ones are the motor and the framesides. The blue parts are the cross keepers. The brown unit is the cylinder block with the valvegear. Here this is an old type valvegear. |
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The same drawing but with the new type valvegear. You can also observe the compensation rod above the wheel axles. |
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The drawing of the framesides. This drawing was used to create the hole coordinates list for the CNC drilling machine. Not only the round holes but also the corners of cutouts were drilled. |
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These are the vertical placeholders for the frame. The middle parts serve also as boiler supports. The hole pattern was also made by the CNC machile, the cutout corners included. |
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The horizontal distance holders for the frame and the gearbox. For those parts which fix the gearbox to the frame the hole pattern must be the same. |
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The gearbox framesides. The gear outlines show where the gears extend from the gearbox. Those areas require a cutout in the distance holder sheets. |
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The motor mount. |
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The main rod and the connecting rods. The connecting rods are separate pieces between the 1st and 2nd and the 2nd and 3rd wheelsets. But the separate rod is not connected simply to the first one, as on the prototype. Instead it also has a hole for the crank and will be mounted overlapped with the othe rod. |
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This drawing was used to create the drill file for the CNC drill machine to make the parts for the old type valvegear. All holes' coordinates were located in this drawing and copied into a drill file. After drilling the holes the parts were cut out by a piercing saw. |
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The same drawing for the new type valvegear. Here you can find the reverse arm in the center. The old valvegear drilling file did not contain this part as it was made by etching, due to its complex shape. Several parts have the same dimensions, but some of them are different, due to the different valvegear geometry. |
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The smokebox-door drawing. The rivet strips should be made by etching. No punching can produce such narrow riveted strips. |
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Drawing of the smokebox. The steam pipe covers are rather thin, hard to fit to the round cylinder. |
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The cab drawing. In order to avoid double bending this was made from three parts, the roof is the fourth one. |
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This page was updated last time on March 29th 2006
© János Erö
