Turning the journals is not that hard, the crankshaft is being cut out of a solid piece, so you make a fixture, or use a four jaw chuck, to hold the piece with the journal centered, at the chuck, and either a similar fixture or just a spot for a live center at the tailstock. The workpiece spins way off center except for the journal being turned.
PS knowing how it is done, and being able to do it are not the same.
Tony
--- In diesel_mercedes@yahoogroups.com, Bogy Wan Kenobi <polespearbogy@...> wrote:
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> I can't imagine the discipline and dedication that it takes to do a project like that. Maybe I can't comprehend loving something that much and just immersing yourself into it. WOW!
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> That said . . . It is not a diesel nor a gasoline powered engine. Notice the cam gears are the same size as the crank gear? It is a compressed air engine. It runs on compressed air.which doesn't detract a bit from the magnificence of the accomplishment.
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> Thanks for sharing.
> Bogy.
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> --- On Fri, 12/14/12, Boyd Wright <bgthegreat@...> wrote:
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> From: Boyd Wright <bgthegreat@...>
> Subject: Re: [diesel_mercedes] Re : Small Diesel
> To: "diesel_mercedes@yahoogroups.com" <diesel_mercedes@yahoogroups.com>
> Date: Friday, December 14, 2012, 5:43 PM
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> Thought you guys would enjoy this:
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> If you don't love this one, you have not the soul of a true gear head. OPERATIONAL V-12 DIESEL ENGINE THAT FITS IN THE PALM OF YOUR HAND. This is not CNC technology; this guy made everything at home on his lathe and drill press. Took 1220 hours (a year and a half?) to make the 261 pieces. Note the end-loaded crankshaft into the block (like an Offy), 12 individual cylinder heads, TINY rods and pistons, dual "under head" cams with pushrods to rockers in the heads. And, he did break-in using an electric drill driving the crankshaft! Even if you're not an engineer, you'll love this! http://www.wimp.com/tiniestengine/
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