YP
4-6-2
Click here to see another photo of YP
The YP Class 4-6-2 was the most common meter-gauge passenger locomotive in post-independence India. Chittaranjan and TELCO in India and several foreign manufacturers built many of them. As late as 1998, YPs were still hauling passenger trains in some parts of Gujarat. A YP is preserved at Mysore.
The photos are courtesy of Mr.Louis T.Cerny, author of "Meter Gauge Steam in India".
TECHNICAL NOTES
YPs had American-style bar frames supporting the boiler. Pound for pound, bar frames were lighter than the plate frames and were easier to manufacture.
The YP was essentially a scaled-down version of the broad gauge WP. However, the YP was not given the characteristic rounded firebox door of the WP; the famous "bullet-nose" was the sole privilege of theWP. The YP also had a lot of parts in common with the YG 2-8-2, which it strongly resembled. Both engines had "elephant-ear" smoke deflectors, which kept the smoke away from the engine driver's line of vision.
Other technical features of the YG include: Spring-loaded inter-drawgear; spring controlled engine leading and trailing bogies; high centre of gravity to ensure better riding qualities; Timken roller bearings on all bogies, trucks and eccentric cranks; improved boiler proportions for burning low grade, high ash Indian coal.
DIMENSIONS
Boiler Pressure: 210 psig, Cylinders: (2), 15 1/4" Bore x 24" Stroke, Wheel Diameter: 4'-6", Tractive Effort: 18,450 lb, Engine Weight: 57 tonnes (without tender), Nominal Axle Load: 10.5 tonnes, Maximum Permitted Speed: 45 mph
