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Paperinik77pk posted a topic in LEGO Train TechHi all! Here we go again with big Lego trains running on 45mm G Gauge track! Some of you may remember the yellow Toy Train locomotive I prepared back in 2019 -it was one of my first experiments with G-Gauge trains. This little locomotive was based on a small Powered-Up battery box and a Medium motor. Here it is during a night run on the new 45mm copper track with wooden sleepers I restored to be used on my small garden railway. Here's a detail of the old chassis with the original 1,667:1 gear ratio. This solution proved to work fine on a flat track at home, but was completely useless on the garden line, which can be easily considered a "mountain railway". A 3:1 gear ratio worked better, but gears were too stressed and speed was ridicolous. Plus, with some wagons, the motor always needed to work at full speed. Therefore, back to the lab, I completely revisited the heart of the locomotive, and updating some details on the exterior. Here it is, the Mark II (TADAAAAAAA) !!! And...what's new??? Actually, at body level, it did not change so much from the older one . Handle bars, and headlights have been modified and a new exhaust scoop has been added over the hood (there's no more a red On/Off button). The real new part is under the bodywork: A completely new chassis has been introduced, and now features a new 4-ports PuP Hub and a more efficient Large Motor. Gear ratio is now 2.779:1. It is very strong and smooth - the big battery/bluetooth hub helps traction (which can be increased with the use of rubber bands around the wheels), and the L-Motor is a great improvement over the M-Motor. I've prepared some workflows on the PuP application to work at 25/50/75/100% of the power. The chassis can be detached from the body with four "fast unlock" pins, so changing the batteries is now an easy task. Then, with a locomotive now up to the task of garden railroading, I needed some rolling stock. I've some LGB wagon bases with studs on top (item number 94063) which are the perfect chassis for some wagons I've designed in Stud.io. Both axles are steering, to help the wagon working on tighter curves. So here it is the small gondola , in a bright blue color: And the tan/beige gondola with taller sides: The LGB chassis runs smoothly and really helps the whole train to roll better. Sometimes these things are available (used or new) with an acceptable price, so I get them. A final photo of the consist (fat least for the moment)! Next to come, a passenger and a closed freight wagon with sliding doors (let's see who comes first). I'll try it on the garden railway soon and give some feedbacks (for now only some pretty satisfactory tests were conducted on homemade ramps) I hope you like it!!! Ciao! Davide
Paperinik77pk posted a topic in LEGO Train TechHi all, today I'd like to show you something I'm after since a few months. During the first days of lockdown I saw a documentary on Chile and its people, towns, traditions and lifestyle. One of the main points of the documentary was focusing on the railway running from Los Andes to Rio Blanco valley , a spectacular run between mountains, aside the Rio Blanco river. Originally it connected Chile to Argentina. And this "thing" was presented as the main attraction of the current line - its name is "Gondola Carril T-1024". I sincerely do not know why it is called "T-1024" . The "Gondola Carril" is a railmotor, based on an American built bus, the Yellow Coach Z-26. This time I understood that the letter Z is identifying the chassis type and 26 the number of passengers it could carry . The bus was normally used in Los Andes town, until it was converted into this very nice railcar. Originally used as a cheap inspection vehicle, It is now fully restored and used for touristic travels. And I can say it is an experience I would like to do once in my life. The "Ferrocarril Transandino de Chile" is a narrow gauge (metric) railway, therefore I based the whole project on 1:22.5 scale (good for running in the garden!). It is designed to run on G-Scale track (45mm), but with some modifications it could easily be converted to run also on standard Lego gauge (on large curves, since it is quite long). Since there are no specific technical specifications for the Gondola, I searched for the ones of the Z26 Bus - and tried to adapt the design according to the pictures and videos of the real railcar. The original motor used by Yellow Coaches Bus was replaced by a more modern Cummins Diesel, as nicely "declared" above the radiator. Despite the original railcar is based on a chassis, this one is basically a unibody build with some underside reinforcing (let's say - like the Jeep Cherokee XJ). It's quite light, so a medium motor is sufficient to move it. In the design, I used a PuP motor, placed in the front, under the hood. Then a pair of gears in cascade, cardanic joints and a transmission axle bring the power to the rear wheels. The "gears" I mentioned can be changed easily to have a lower or higher gear ratio, as needed. This railcar not meant to pull anything, so a lower gear ratio could save some batteries. Battery box is placed in the rear part, immediately beyond the rear axle. The small red axle you can see near the T-1024 sticker is used to turn the PuP battery/receiver on and off. The next picture shows the powertrain - it's taken from an alternative blue version of the railcar I prepared , with some freelance solutions which make it more "generic". I hope you like this one, and (more important) take a look to the original one, because it's really nice piece of history. https://www.ferrocarril-trasandino.com.ar/historia/ Ciao! Davide