Tiny Trains - About Us. Pololu Plastic Gearmotors. Compare all products in this category This compact, inexpensive, low-current gearmotor (brushed DC motor with a 180:1 reduction gearbox) is well suited for use in small robots. At 4.5 V, it has a free-run speed of 80 RPM and a stall torque of approximately 30 oz-in (however, the built-in safety clutch might start slipping before the stall torque is reached). The D-shaped output shaft has a diameter of 3 mm and works with the Pololu wheels and 3mm universal aluminum mounting hub. This gearbox output shaft is perpendicular to the motor shaft.
This compact, inexpensive, low-current gearmotor (brushed DC motor with a 180:1 reduction gearbox) is well suited for use in small robots. This compact, inexpensive, low-current gearmotor (brushed DC motor with a 120:1 reduction gearbox) is well suited for use in small robots. This compact, inexpensive, low-current gearmotor (brushed DC motor with a 120:1 reduction gearbox) is well suited for use in small robots. The White River and Northern Model Railroad: Clinic. The World's Smallest Functional Layout? * This may be one of the crudest looking layouts you've ever laid eyes on, but before you pass such harsh judgment on it, take a guess at how big it is.
You probably would not think that it's all of about a half-inch across the front. I nicknamed it the Sceniced and Ridiculously Small Railroad (in homage to Rick Spano's Sceniced and Undecided). In N Scale, the layout measures four by eight feet. To see the layout in a setting that will clearly illustrate its size, scroll all the way down to the end of this article for a view of the layout held between my fingertips. Layout Construction The layout was built from the mechanism up, starting with the key ingredient: the oval band that moves the train.
The mechanism that turns the loop is comprised of a pair of drums rotated by a geared micromotor. After the mechanism was fully completed, functional, and run in, the layout itself was created. Track and Rolling Stock Scenery and Backdrop Wiring and Control. James River Branch: N Scale Layout In Z. Thus, what was intended to be a Z scale model of a 4- by 8-foot HO scale layout became a Z scale model of a 2- by 4-foot N scale layout! After I picked myself up off the floor, I made a few quick calculations... the modeling scale would be an eye-popping 1:35,200, and the finished layout would measure .125 by .200 inches—or, roughly one third the size of its predecessor. I very nearly abandoned the project just based on these numbers; fortunately, I tried anyway. As sometimes happens with a uniquely demanding project such as this, I expended a considerable amount of time and effort in the trial-and-error phase. My first inclination was to make a geared micro-mechanism that was essentially a miniaturized version of the one I'd made in N scale, which I spent a week building.
Disheartened, I briefly considered taking the "easy way out" and building a simple circle layout, but I felt that would look a bit too much like a music box. The new layout is compared to its predecessor. Micro Layout Design Gallery. Micro/Small Layouts for Model Railroads. Electrically Driven Locomotives In 1/480th Scale. [ Index | A.A.Sherwood | Standard Gauge | Narrow Gauge | Live Steam | 1/480th Scale ] Written & Illustrated By A. A. Sherwood *And More Pictures Of 1/240th Scale Live Steam Locomotives Comparisons in size can be made from these three locos. The G.N.R. 0-6-2 Tank is to 1/480th scale the 'Crab' and Brighton Mogul are 1/240th. A layout (Model Railway News, June '68 p. 292) made about eight years ago in 1/240 scale (slightly smaller than the recently introduced Z gauge) by the author has been shown in operation at exhibitions every year since construction started. Problems of Manufacture In commercial production manufacture of items is facilitated by dies, jigs, special tools, etc. most of which are very elaborate and time consuming to make and only justified when components are to be made by the thousands.
The worm and worm wheel drives require high precision to give smooth motion at slow speed. The armature cores (see Fig. 1) are machined from hexagon bar to simplify indexing. Performance.