Before we got under way there was time to admire Keith's point work for a fiddle yard. This is constructed with flat bottom track soldered directly onto a PCB board, with the necessary electrical isolation cuts. This method would suit embedded track for an industrial or dockside setting.
Dapol Terrier conversion, Part 1
The replacement chassis etch and items from the parts list were obtained from the 2mmAssociation shop 3, with a few added components suggested by Keith and Alan. A couple of useful supporting documents can be found on the 2mm Association website; Etched replacement chassis for RTR loco bodies, includes parts list and generic illustrated instructions for several locos (including the Terrier). A specific etch diagram and chassis arrangement for the Terrier is here. Both documents are downloadable PDFs.
|The Terrier etch and diagram, chassis arrangement and the sacrificial Dapol Terrier|
The etch and a block of 'synthetic resin bonded paper'
First Keith tinned the fold-over crank shafts without removing them from the etch.
(left) Using the block of 'synthetic resin bonded paper' he marked out a line and positioned one end of the crankshaft on the etch onto the line and using a .5 drill to insert a .5 locating pin all three axle positions.
Satisfied the crankshafts were accurately located onto all three pins, both crankshafts were removed from the etch...
...resulting in the the completed crankshafts.
The next stage was to build the Frame Assembly Jig, cut from the etch.
The sides and ends were folded up to form the box, checked for square and the tabs were soldered in position (below)
(this picture shows Keith using his own jig to hold the etched frame assembly jig square whilst soldering the tabs, note the axes are also in position)
End of part1; many thanks to Keith
In case it helps fill in any gaps, included are sketched notes below.
Loco of the month is the Terrier!