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Mars Lights - Gyrating Warning Lights

HYBRID MARS LIGHT (4449)

Photo source: Aug. 1996/Apr. 1998 issue of "Trains". (permission for cropped photo: 3/3/98)
GS-4 4449
Mars Light in upper headlight opening

The oscillating light in the 4449 is has the bulb mounting plate of a rotating dual bulb Mars Light. This mounting plate is secured to a "figure 8" mechanism from another type of Mars Light. The motor has 2 linkages joining the mounting plate. The light is run with both lights on. The beam pattern of this unit is a "figure 8".
Larry Miller (4449 roundhouse)
Chris Zurek

The GS4 configuration has 3 dynamos, 2 operating at 32V, one for headlights and cab lights and the other for electric brakes, (that one is now used for skirt lighting). The third dynamo is a 12V unit for the Mars Light (we also use it to operate the radio).
The mechanism for the light consists of a vertically installed 12 volt motor with the gearbox located below. On each side of this gearbox, a link connects to the top and mid-section of the bulb mounting plate. The bulbs in this unit are 12 volt, 7" auto bulbs.
Larry Miller (4449 roundhouse)

The following photo (and crop) were taken by Larry Miller:
The headlight plate (Mars SB-9000) is affixed to a circular gimbal of another Mars unit which used a single bulb-reflector or sealed beam lamp.