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The O&K 0-4-0Ts, and presumably the Porters aso, use the Joe Works arrangement with a vertical can motor driving a train of spur gears. But these gears have much finer teeth than Joe Works used, so give a higher reduction ratio, which slows the locomotives down.
The Shay drive drawing shows a tiny open frame motor mounted on the rear truck, driving a line shaft through an approximately 2:1 reduction. Assuming the common 15:1 near minimal worm reduction, gives 30:1 total, which should provide decent speeds. For even slower speeds, replace the initial gears with a Nigel Lawton square belt drive, at about 3:1. Eliminating the high speed gears should be quieter.
In the parts section, Toma is offering 7 & 8mm by 16mm coreless motors, which may be his new standard. If so, new production should perform better than current.
The Shay's motor fills the tank, but a small decoder might be put under a large wood pile. See photos of Sumpter Valley tenders for ideas. If you enclose the Shay's cab there is plenty of room, even for sound. It's a T-boiler Shay, so the boiler is needed for weight. For the Porter, one might get a really small decoder in under the roof. Slightly dirty windows all round might be needed, but at normal viewing angles a cab roof can hide a lot.
The English language home page indicates that an HOn3 version of the Shay is already planned, but an HOn30 WW&F Forney is next up. He is also planning a 009 (1/76 scale, 9mm gauge) version of the 13t Shay, which will scale out to about 20t in HO.
On October 28, 2020 5:10 PM captaindavekrembs via groups.io <captaindavekrembs@...> wrote:
I have had several Ken Kidder Porters and thee look a world better. Hope they are not "slot racers" and have room for decoders.
Toma Model Works has been producing some nice HOn30 model locomotives. A friend has the HOn30 model of a Porter 0-4-0 and says it runs very well with it's preassembled chassis. I emailed Kenji Toma and asked if there was any possibility of a HOn3 version in the future. He replied that several had inquired about an HOn3 version and he was considering including HOn3 in a future run. Does anyone else in this group want such a loco? Perhaps if others express interest to Toma, that may increase the chances for production of some small HOn3 locos. Below is the web address for this product which includes photos.
I have no connection with Toma Model Works; I'd just like to be able to purchase some of these small engines in HOn3 myself some day.