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Deerfield and Roundabout Railway
An educational demonstration steam powered 7 and 1/2 inch gauge railway operated by the
Lake Forest Live Steamers Railway Museum Incorporated.

DIESEL ELECTRIC LOCOMOTIVES: B-B Type
81 cyclo

Deerfield & Roundabout B-B Type Faux Diesel Electric Locomotive, for general purpose service.
Buker Locomotive Works, Chicago, Builders No. 3, 1966
Patterned after General Motors Electro Motive Division, Model GP7, circa 1950.
Construction completed 1966 by Edward "Bud" Buker.
Image recorded and edited by Jeffrey G. Hook, 2010.

Tractive force (30% adhesion)...................... 296 lb.
Weight on driving wheels........................... 986 lb.
Total weight of engine............................. 986 lb.
Electrical energy source..... Lead/sulfuric acid batteries
Type of batteries................. 3 cell, 6 volts nominal
Number of batteries..................................... 6
Operating voltage DC..................... 36 volts nominal
Traction motor controller..... Solid state electronic type
Traction motor reverser........... Muti-pole rotary switch

Traction motors............ 1 per truck driving both axles
Traction motors.......... DC commutator field winding type
Truck wheel base................................ 13 1/2 in.
Total wheel base..................................... 5 ft.
Length over draft faces of couplers........... 6 ft. 11 in.
Track gauge, minimum on tangent unguarded track.. 7 1/2 in.
Outside gauge of flanges........................ 7 7/16 in.
Engine brakes...................................... Manual
Equipped with electronic sound effects system.

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