K27 Spring Rigging
leaf springs for this project are
being made from phosphor bronze to provide some "spring". The 12" x 12"
x 0.05" sheet has been cut into strips using a metal slitting saw.
December 3, 2017.
individual leaves have been rough
cut to length. The top portion is the leaves for the trailing truck
with 8 per stack. The bottom
portion is the driver leaves with 9
per stack. December 3, 2017.
leaves have all been finished to
the final length and a couple of drilling jigs have been made to add
the holes to the main leaves. December 13, 2017.
leaves have all been drilled and
put together with a center pin. The top two are for the trailing truck
and then we have four sets for the drivers. December 23, 2017.
bands for the driver springs are starting to take shape. All that is
left is to radius the ears and then cut the rocker that will be pinned
at the bottom. January 3, 2018.
Sample of a driver spring with
completed band. January 7, 2018.
After a long break due to other
priorities all of the springs have been assembled. The bottom two are
the special ones for the trailing truck. April 2, 2018.
These fabricated pieces will be the
start of the driving box saddles. Each was made be bolting two pieces
of plate to a bar and then silver soldering the joints. April 8, 2018.
Six of the driving box saddles have
been cut to size and some preliminary shaping has taken place. Two of
the saddles are slightly longer than the others and will be cut out of
assembly at the left. April 8, 2018.
The driver box saddles have been
drilled and tapered. The final step will be a more aggressive taper at
the bottom followed by rounding around the spring mounting hole. Note
that the saddles are shown upside down in this shot. April 29, 2018.