Eagler's Nest
Engines => 2 Cylinder => 1/2 vw => Topic started by: John Harmon on April 09, 2014, 11:38:38 AM
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Finally! I haven't had much of a chance to work on my own plane lately. My family has been passing around a mean little bug. Throw in Spring break... and March is pretty much a bust for me. I haven't been completely idle, I did manage to get my timing gears lightened.....(https://lh3.googleusercontent.com/-_CZEZhkvnPI/U0WJTeJoe3I/AAAAAAAAAys/Ykn3FaH-gl8/w958-h539-no/20140409_115358.jpg)
I drilled six equally spaced holes in the big one and cut the face of both down a little. Don't worry, I remembered to transfer the timing marks before I cut. Also some long awaited parts started arriving back in March. First was my 92mm Nicom cylinders from Hummel Engines.
(https://lh6.googleusercontent.com/-hhtIe6gOwS0/U0WIrx3BscI/AAAAAAAAAyg/PiTScOpPCIo/w958-h539-no/20140409_115125.jpg)
And then last week my DeMello crankshaft. 82mm stroke, chevy journals, counterweighted and balanced. Don't ask me how he gets in there to weld those counterweights on!
(https://lh6.googleusercontent.com/-xCyZub-EF7E/U0WIes_0tuI/AAAAAAAAAy8/63yywHFuVXk/w958-h539-no/20140409_115030.jpg)
I also got my head from MOFOCO but it's out getting cut for the 92mm cylinders. The person I lined up to weld my heads after I cut them flaked out, so I have been practicing on several junk heads I have laying around. I won't show a picture of that yet as they don't look as good as I would like. The last test I did is completely functional, just not as pretty as I would like.
Regards,
John Harmon
XL-D-06
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John:
Good looking parts...
I drilled the camshaft & rocker arm shafts on my engine - it's a lot of weight you'll never need to fly... I didn't go all the way thru on the rocker arm shafts - about up to the anchor stand - drilled up to the front bearing on the cam... Used a 1/2" drill IIRC... Drill slow with a lot of lube... Used a lathe...
There is a photo explanation of the Ward procedure to put the roll pins in the rocker stands in the yahoo group files - I think I put it on the Halfvw group too...
There is a rumor that the Carbon Cub uses thin alum accy case hole covers epoxied in place (my thought Proseal) - that saves the weight of the thicker plate and (bolts) ! ! ! I have a friend in cover stage on a CC and will try for some photos [again] - I'll see him at Osh14...
Thanks for the good photo's - that's the first 69mm German core crank with the Chevy journals I've seen... I wonder if Scott Casler drills those journals when he does the Hummel advanced balance job?....
Steve