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FOLLOWING THE DEVELOPMENT BY SLM, BROWN BOVERI AND OERLIKON OF THE SIX-AXLE Ae6/6. THE FIRST TWO EXAMPLES No's 11401 &11402 WERE DELIVERED IN 1952 &1953, WITH AN HOURLY RATING OF 4290 kW.

(5750 H.P) PROVED CAPABLE OF MAINTAINING A SPEED OF 75 KM/H

(47 M.P.H.) WITH 600 TONNE PASSENGER TRAINS ON GRADIENTS OF 2.6%

( 1 IN 39 ). BY EMPLOYING MODERN CONSTRUCTION TECHNIQUES, INCLUDING AN ALL-WELDED BODY, THE DESIGNERS OF THE Ae6/6 ACHIEVED AN AXLE LOAD OF 20.6 TONNES THIS WAS FURTHER REDUCED IN THE MAIN SERIES TO 20 TONNES. THE FIRST 25 UNITS, no's 11401 - 11425, ARE EMBELLISHED WITH "CHROME" WHISKERS ON THE CAB FRONT WITH ONE BAND EXTENDING ALONG LOCOMOTIVE SIDES AT WAIST LEVEL. THIS SERIES OF LOCOMOTIVES IS NAMED AFTER THE SWISS CANTONS WHILE THE REMAINDER OF THE CLASS BEARS THE NAMES OF TOWNS AND TRAFFIC CENTRES SERVED BY THE SBB. IN EACH CASE THE APPROPRIATE COAT OF ARMS IS DISPLAYED ON THE BODY SIDE AND ALL UNITS BEAR THE CROSS OF HELVETIA ON THE CAB FRONT.

SPECIFICATIONS AND DATA.

TYPE. CLASS Ae6/6.

NUMBER BUILT. 120

DATE INTRODUCED. 1952.

BUILDER MECHANICAL PARTS. SLM

ELECTRICAL EQUIPMENT. BROWN BOVERI. OERLIKON.

LENGTH OVER BUFFERS.18,400mm ( 60ft 43/8ins.)

MAXIMUM SPEED. 125Km/H,( 78 M.P.H.)

MAXIMUM TRACTIVE EFFORT, No's 11401 & 2, 324 Kn ( 72,000 lbs.)

REMAINDER OF CLASS. 393 Kn. ( 88,200 lbs.)

WEIGHT IN WORKING ORDER, No's 11401 & 2, 124 Tonnes. ( 124 Tons ).

REMAINDER OF CLASS. 120 Tonnes. ( 118 Tons ).

ELECTRIC BRAKE. REGENERATIVE.

HORSE POWER. 5,750 H.P.

TRACTION MOTORS. SIX. SINGLE-PHASE COMMUTATOR TYPE

GLM 982 St/10 WB 900, FULLY SUSPENDED WITH BBC SPRING DRIVE

DRIVING WHEEL DIAMETER. 1260mm ( 4ft 15/8ins.)

CONTROL. H.T. TAP-CHANGER.

NUMBER SERIES. 11401 - 11520.

POWER SUPPLY SYSTEM. 15kV ac 162/3 Hz.

CONTINUOUS OUTPUT. 3972 kW ( 5320 H.P, 5395 C.H).