Well all, having gotten the cylinders out of the way, I've gotten to the crank, which of course is the thing we all look forward to making, when building an engine. In this one, the crankshaft is a five piece affair if you only count the big pieces, and about a twenty piece one, if you count all the pins and such. I just count big pieces as that way I don't have to take off my boots in the count.
The front shaft, which drives the propeller, has the first gear of cam drive train cut in the shaft its self, it is four and a quarter inches long, with a breather hole drilled from the prop end back, with a cross drilled hole near the pinion, and an oil feed hole drilled from the back end, half way through to the main bearing, where a hole will be drilled to let the oil out on the bearing.
![](http://i894.photobucket.com/albums/ac150/madjackghengis/IMGP0713.jpg)
threading the mainshaft for the prop nut
![](http://i894.photobucket.com/albums/ac150/madjackghengis/IMGP0714.jpg)
finishing the front shaft end
![](http://i894.photobucket.com/albums/ac150/madjackghengis/IMGP0715.jpg)
drilling the oil passage for the main bearing from the back side of front main shaft
![](http://i894.photobucket.com/albums/ac150/madjackghengis/IMGP0716.jpg)
cutting the pinion gear on the front shaft for the cam drive train
![](http://i894.photobucket.com/albums/ac150/madjackghengis/IMGP0721.jpg)
finished pinion, ready for a bearing sleeve to be pressed on and machined to fit. cutting pinion runs off into bearing area, so it is cut down, making room for a sleeve when the pinion is done.
![](http://i894.photobucket.com/albums/ac150/madjackghengis/IMGP0724.jpg)
front shaft with the spur gear which it will drive
![](http://i894.photobucket.com/albums/ac150/madjackghengis/IMGP0725.jpg)
starting the jack shaft for the cam drive train
![](http://i894.photobucket.com/albums/ac150/madjackghengis/IMGP0728.jpg)
finishing the other end of the jack shaft for the cam drive pinion
![](http://i894.photobucket.com/albums/ac150/madjackghengis/IMGP0729.jpg)
jack shaft with both spur gear and pinion mounted, along with main shaft
![](http://i894.photobucket.com/albums/ac150/madjackghengis/IMGP0735.jpg)
main shaft propped in place in front main bearing, with jack shaft installed and spur gear engaged with pinion of the main shaft. Main bearing is integral with bronze bearing which carries the cam, and also has rear jack shaft bearing reamed in it.