Adler is the first German railroad that operated between Nürnberg and Fürth in 1835.

Material for adler-steam-locomotive-1835.svg: plywood 3.2mm, 40cm x 30cm,
There are two laser layers in that file, one with gauge 45mm, and one with gauge 74mm.

(Alternative file adler-steam-locomotive-1835-4mm.svg: plywood 4mm, 53cm x 40cm, gauge 98mm)
A piece of living hinge forms the center of the boiler. Take care that the grain runs lengthwise, or this piece will easily snap.
The front and back of the boiler consists of two walls each, and a large number of J-shaped strips. To assemble the front (or back) use three toothpicks to align all the parts. Two toothpick go through the lower left, lower write holes. A third toothpick goes through the top center hole, where the pieces should go alternating left and right.

Update 2019-05-12: Moved the boiler 3mm higher to better approximate the original proportions.

Update 2019-06-16: Made a downscaled version for gauge 45mm.
Update 2019-07-21: Tender added.
Update 2019-07-27: Tender 7mm shorter, 3mm lower
Update 2019-12-08: Coach added. 3rd class open version without roof.
Update 2020-06-06: Added laser-...-only.svg files. These are single layer and one file per object. Exported from the master file adler-steam-locomotive-1835.svg -- for use outside of inkscape, in case you cannot separate layers correctly.

• laser-g45mm-locomotive-only.svg fits on a 40cm x 30cm board. Leaving some room for the tender.
• laser-g45mm-tender-only.svg exactly fills the remaining area of the above.
• laser-g45mm-coach3rd-only.svg covers 23cm x 26cm.
• laser-g74mm-locomotive-only.svg covers 40cm x 30cm.

Update 2021-06-21: Added laser-g45mm-tender-ttgo-back.svg, that is a rear wall with mount and window for a TTGO controller with oled display. https://www.youtube.com/watch?v=cDfp4OZJlNQ

Tender or coaches only exist as 45mm gauge version. To match 74mm gauge, you can scale them up by a factor of 1.66 and use 5mm plywood.

Laser instructions

The color of the lines determine the laser settings: red lines cut, green lines just leave a mark on the surface. Everything else (e.g. blue lines or infill) should be ignored.