![]() Laube Volunteer Fire Company Partway into initial construction of the WR&N III, the track plan underwent a major revision, and a structure that was nearly finished—a firehouse with working doors adapted from Otto's Parts, a Design Preservation Models kit—was no longer needed. Rather than scrap the project, I completed it and donated it to Rick Spano for his Sceniced and Undecided. Although the rollup doors appear to work independently, they are actually operated by one mechanism.
A pin on the edge of the wider door catches a pin on the edge of the smaller one after the larger
door is partway open. The doors slide along Plastruct H columns; in the raised position they
are hidden behind simulated Venetian blinds The lifting mechanism consists of a geared micromotor that rotates a 4-40 bolt. A 4-40 nut moves a rod through a tube that runs parallel to the bolt; it also engages microswitches to stop the motor at each end of the cycle. The sliding rod engages a lever that swings up and down to move the doors. Image specs: These images were captured with a Canon 20D digital SLR. |
Copyright © 2006-2010 by David K. Smith. All rights reserved.