1909 MERCEDES

AERO ENGINE BUILD

Part 12 by Steve Gosling

... Continued from part 11.

The crankshaft. Laid out all the material and then start on squaring up the webs.

The the crank pins. These should be a simple turning job.
Unfortunately, I overcooked them a bit and they were only a firm push fit. Rather than make a complete new set, I decided that I would push them all together with Loctite.
The front end of the crankshaft has a 1:10 taper to seat the propellor boss so I set that up by clocking along a piece of silver steel with the top slide set over. It only took a couple of goes to get it perfect.
Then a keyway for the timing gear and propellor boss.
The piece of aluminium on the left is a jig to hold the pin square whilst pressing it into the web. Pressing it all together true is quite a challenge.

Part 12+1 here...

 
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