History
During the later years years of World War II, shunting locomotives were desperately needed in Japan. Owing to the wartime circumstances, authorities from different railway companies needed to form a special committee in order todevelop and manufacture locomotives, such as B20. Its design was simple and low cost - in fact it was the only saturated, (non-superheated), steam locomotive on the JNR roster. Production began in 1944 and lasted until 1947. During that time, 15 units were built by both Tateyama and JNR's Kouriyama Works. Some of them continued in operation as late as 1972. Two B20s are on display throughout Japan - one resides at Umekoji Steam Locomotive Museum in Kyoto.
| Scale/Gauge |
1/24 G GAUGE (45 mm) |
| Weight |
2.8 kg. |
| Length |
302mm |
| Width |
106mm |
| Height |
148mm |
| Wheel Arrangement |
0-2-0/0-4-0 Four-Coupled(B) |
| Driving Wheel |
DIA.35mm |
| Pilot and Trailer Truck Wheel |
|
| Tender Truck Wheel |
|
| Axle Driven Pump |
|
| Cylinder |
2 cylinders, Bore 12mm x Stroke 20mm |
| Valve Gear |
Walchaert type Valve travel 5.0mm, Cutoff 84% |
| Boiler Type |
Center flue Pressure : 2kg/cm2 at normal working |
| Water Capacity |
120cc at 80% full |
| Boiler Fittings |
Water gauge, regulator valve,check valve, filler plug |
| Lubricator |
Roscoe displacement type located in the right side tank |
| Tender |
Available as optional extra. |
Water Tank Capacity
|
|
Fuel
|
Butane |
| Fuel Capacity |
31cc |
| Minimum Radius |
0.55 m |
|
