JNR C62 Class
The C62 class (4-6-4) was the most powerful passenger steam loco ever built in Japan and held a world speed record (129km/h) of narrow gauge steam loco (3' 6”) in 1954. Only 129K/h? It does not seem so fast now days, but was great then!
JNR only built freight locos in the WWII to fill the military transport requirement, like D51 and D52 classes. After the end of the war the situation changed to totally opposite direction. They needed more passenger locos to cope with people's movement toward their home. However GHQ (General Head Quarter of occupying American military) did not allow JNR to build enough new locos. So JNR cheated Americans offering a modification plan from freight locos to passenger locos. If you are familiar with steam locos, you can know this proposal is bullshit straight away. However Americans approved the idea. The “modified” locos were virtually brand new machines. Only boilers and auxiliaryequipment were reused, and all others were newly designed and manufactured. They “modified” D51 class to C61 class and D52 class to C62 class in 1948 and 49. Both C61 and C62 employed 4-6-4 arrangement firstly introduced in Japan.
C62's were used on 1st class main lines to haul express and limited express trains. C61's were smaller than C62's and used on 2nd class main lines in the same purposes. C62's had a capability to reduce the drive axle weight to suite to 2nd class main lines with small modifications and they were called light weight type. The C62's used in Hakodate Main Line were all light weight type. |