[12/08] All locos in the class have been converted to WAP-4. This class was really a variant of the WAP-4 design. One or two prototypes were built early from existing WAP-1 or WAP-4 locos without renumbering. WAP-4 #22212 (formerly a WAP-1) was the first to be converted to a WAP-6; it was provided with Flexicoil bogies and other upgrades. Later this particular loco was later converted back to a WAP-4 (and even refitted with the standard WAP-4 bogies). Curiously, it spent a long time with both class codes WAP-4 and WAP-6 on it. Later, more WAP-1 locos were regeared and provided with high-adhesion fabricated bogies (Flexicoil Mark IV) which are somewhat similar to the Alco Hi-Adhesion bogies. About 16 (perhaps more) of these were built (All in the number series 22400-22416.) Of railfan interest is the fact that some of them reveal their origins in the form of the old WAP-4 class code being still evident — often a ‘6’ is crudely repainted over the ‘4’ which is still visible.
They were intended for service at 160km/h but failed trials and were restricted to a top speed of 105km/h. They were then used for less prestigious trains such as the Amritsar Exp., Doon Exp., or Janata Expresses.
The remaining ones (thought to be 13 in number) are now [4/02] homed at Asansol. It is reported [5/02] that some of these (perhaps only two, #22406, #22408) have been upgraded with better wheelsets, etc., so that they are now capable of higher speeds (max. 160km/h?). [1/05]One loco #22410 looks to have been converted to a WAP-4 and is now homed at Howrah. Air brakes for loco and train provided as original equipment. Auxiliaries from Best & Crommpton, S F India, Accel/Flakt, Elgi, etc
It appears that the WAP-6 were a failed experiment in upgrading the basic WAP design using different Flexicoil bogies and other changes.. When the performance of these units proved unsatisfactory, IR switched to improving the WAP-4 loco and stuck to that design instead.
- Manufacturers: CLW
- Traction Motors: Hitachi HS15250 (See description under WAP-4.) Axle-hung, nose-suspended, force-ventilated.
- Gear Ratio: 58:23
- Transformer: CCL make, aluminium coil. 5400kVA. 32 taps.
- Rectifiers: Two silicon rectifier cubicles. 2700A/1050V.
- Axle load: 18.8t.
- Bogies: Fabricated Flexicoil Mark IV bogies.