Building the Victoria - Final Assembly and Test.
|There were a few alignment issues found during the build which are detailed here so that other builders can try and minimise problems.|
|To get the
cylinder a parallel to the box bed sides as possible it was mounted
with the piston rod pulled out and with the connecting rod fitted so
that it was possible to view any misalignment.
Once positioned as centrally as possible the mountings for the cylinder brackets were drilled and tapped.
|The cross head and guide rail assemblies had
various tight spots when first assembled.
This was likely due to the cylinder not being perfectly flat and aligned with the box bed.
To reduce error in the assembly the cylinder was bolted into place and the cross head positioned with the guide rails.
Then the holes were drilled for the guide rail mountings.
Note that the completed pivot block part was also included (arrowed) as this set the spacing between the rails.
Also note that the supplied studs for the pivot block didn't seem to be long enough so they were replaced with some 7BA threaded rod.
Drilling the guide rail mounting holes.
|The main bearing on the box bed was positioned (angularly) so that the crank was as
free running as possible.
The position of the bearing was also set so along the axis arrowed, so that the piston stroke was centred about the crank throw. This would ensure that the piston would not hit the front or rear cylinder covers throughout crank rotation.
The boxbed was then drilled and tapped to hold the bearing in this position.
Running the engine in on the lathe
|It was now possible to rotate the engine by hand to check for any tight spots.
Then the lathe was used to run the engine in, with lots of oil on the crank journals and in the cylinder; and with the lathe runing nice and slow.
|As memtioned in the boxbed page.
The external pedastal was machined in-situ using a sharp cutter and a
shallow cut, to get it to the same height as the bearing mounting on
This was done with the engine screwed down on its final wooden plinth which in turn had been skimmed level using a fly cutter.
|Here is a video of the engine running on compressed air.