Zwillinge (Twins) model locos in 0-16.5 scale

thingiverse

Based on a thing by knaeckepaul - an H0e / OO9 Zwilling trench railway loco(Search out Zwillinge loco in Wikipedia. Zwillinge means Twin and this was a class of 0-6-0 tank locomotive of 2ft gauge, designed to be coupled cab to cab to run as articulated 0-6-0+0-6-0 engines with a single crew. The "A" locomotive had a higher cab roof, that overlapped the one on its "B" twin. Some of the pairs were split and used singly. Only one survives, on a plinth at Windhoek Station in Namibia.I built an 0-16.5 model of a "B" locomotive to run on an Electrotren 0-6-0 tank engine mechanism. (See Electrotren 0-6-0 mechanism for a model - to aid request to see if other mechanisms might fit)I say "based on" as the wheel spacing is miles out and the external Stephenson valvegear is absent, but I like the result. The file for an "A" locomotive is also included.I decided to build just a "B" to run solo but as I fail to see where coal was carried I have assumed that the new owners built it a small tender based on no particular prototype.I also had to guess about the cab interior, but that is all added from bits box parts. The spectacles are cut and filed from 1mm perspex - using the "spectacles" piece for the filing process.The Electrotren chassis fits without any modification apart from removing the couplings. (assuming makers might be using a different type)and I drilled through its fixing holes into the body and tapped the body for M2 screws.There is enough spare space to allow the tank sides to be lined with 2 layers of 1.7mm lead flashing scrap.The tender coupling comes with three holes, the centre one accepting a pin on a floating footplate that spans the gap between loco and tender. A crew is glued onto this. This proved quite effective on the track, even if the crew fidget a bit..