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F501: Power Chassis

Photo: F500-15.jpg (25K)

Supporting box section frames for the bogies were made from .064 aluminium sheet and angle and bolted to the cross members under the chassis. The original 1" brass pivot bolts were too short and have been replaced with 2" steel ones. 25mm steel washers have been threaded over the pivot above and below the chassis to spread the load and minimise wear on the softer aluminium components. These washers will be glued into place so that they, and not the frame, take any rotational wear from the pivot. Each bogie unit is then held in place by two nuts sandwiching a sprung washer to lock them into place.

Photo: F500-13.jpg (24K)

Awesome.... The 3.5 lb chassis assembly can now move away at a scale 20 mph under its own power. In this early morning scene the bright aluminium strikes a vivid contrast with its damp autumnal surroundings.

With its distinctive radiused corners on the overhanging running plates, narrow buffer beams, and square buffers the chassis is beginning to look like it actually belongs to an F500.

Photo: F500-14.jpg (25K)

I 've allowed for possible installation of a second traction motor, but judging from the test runs this is unlikely to be needed. A second motor would also halve the endurance of the lead acid cell.

This picture shows how the chassis motor bays provide more than enough room for sideways movement of the vertically mounted power unit. Curves down to 3 foot radius can be negotiated easily.

The photographs and text on this page are copyright (c) Paul Backhouse 1998 and may not be reproduced or distributed without the owner's permission.
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