Reflector frame (red) in extreme winter position for the location of Emden, 53° north, mobil SRCC, OSOW1. The crossbars are formed automatically at a large radius.

 

Reflector frame (red) in extreme summer position for the location of Emden, 53° north, mobil SRCC, OSOW1. The crossbars are formed automatically at a small radius.

 

The reflector of the mobile SRCC OSOW1 is in extreme western position. The weight is down and it will move upwards, when the "clock" is wound up by simply turning the reflector frame around the polar axis until the focal spot is exactly in position at the window of the oven.

 

Automatic solar tracking can be easily performed by means of a pendulum clock, driven by a bicycle chain and a weight. OSOW5, FH O/O/W, April 1997. The polar axis (yellow) under the angle of 53o North for Emden, thus must be mounted parallel to the axis of the earth. (At the equator position one must turn the rotating support until the polar axis is exactly horizontal.)

  Photos by K.H. Weiler, FH O/O/W, April 1995 and Sept. 24, 1998

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