Electric Locomotive Arcwright 3D Model

This steeple cab locomotive features sloping hoods and a single pantograph for early DC catenary operation. Inspired by first-generation electric mixed traffic engines, it captures the industrial aesthetic of the era. Use supports for the pantograph and cab details to ensure clean prints.
Size as supplied: 100.0 x 33.6 x 62.5 mm (L x W x H), about 1:154 scale.
Print settings: PLA, 0.12-0.16 mm layers, 0.4 mm nozzle (0.2-0.25 mm for extra-fine detail), 3 walls, 15% infill, 3-5 mm brim.
Supports: needed for undersides and overhangs. Use tree/organic supports touching the build plate only; enable 'support on build plate only' to keep detail faces clean. Support Z distance 0.2 mm and interface layers make removal easy.
Pre-oriented: the 3MF is already placed upright on the build plate (z = 0) - print it as supplied, no rotation needed.

Rescale table (always scale uniformly):
- As supplied: about 1:154 (real object about 15.4 m on its longest side).
- HO 1:87: scale uniformly to 177% (longest side 177 mm).
- OO 1:76.2: scale uniformly to 202% (longest side 202 mm).
- N 1:160: scale uniformly to 96% (longest side 96 mm).
- TT 1:120: scale uniformly to 128% (longest side 128 mm).
- O 1:48: scale uniformly to 321% (longest side 321 mm).

Included files: the 3MF model, a print guide PDF (settings, supports, bed placement, colours, painting, reference views), a dimensions and scaling sheet, orientation and support tips, a real-world inspiration note and a README.

Images: all pictures are digital renders of the 3D model, not photos of a printed copy.