In reply to Duke :
Being a Ghia owner, I am a bit curious about the rear tire clearance (the body restricts tire width unless you add a lot of camber, by lowering a swing axle for example). I suspect this is an IRS that is cranked up and the suspension bottoms out right before the fender.
Went down a 917 rabbit hole a bit. First shows how the fan is driven (off an internal accessory shaft), and a 16 cylinder version (build to see how it compares to the turbo 12). And yes, both entirely air cooled (pretty impressive when you consider the turbo version went over 1000 hp!). I think one of the reasons why that was possible is because they likely did not worry much about low rpm / speed cooling (e.g. optimize for high rpm).
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aircooled said:In reply to Duke :
Being a Ghia owner, I am a bit curious about the rear tire clearance (the body restricts tire width unless you add a lot of camber, by lowering a swing axle for example). I suspect this is an IRS that is cranked up and the suspension bottoms out right before the fender.
Looking at the rear camber, that's a swingaxle. Wonder what's going on in there.
Went down a 917 rabbit hole a bit. First shows how the fan is driven (off an internal accessory shaft), and a 16 cylinder version (build to see how it compares to the turbo 12). And yes, both entirely air cooled (pretty impressive when you consider the turbo version went over 1000 hp!). I think one of the reasons why that was possible is because they likely did not worry much about low rpm / speed cooling (e.g. optimize for high rpm).
More cylinders also means more surface area for cooling, which probably helped a lot.
But the main reason I replied:
That's a lot of carbon fiber/aramid for the timeframe.
And what is going on with the flywheel/clutch?? It's nowhere near centered to the cylinders. Could they be driving the output shaft off of a takeoff in the middle of the engine to cut down on crankshaft whip? It looks like the cam drive is also in the middle of the engine.
Hmm. Very hmm.
Wow, nice Thompson!
Someone on Facebook portrayed this to be their optimum track day weekend towing configuration, can't say they're wrong.
Remote turbos are not new, but that one is very remote
917 engine crankcase opened up.
In reply to rustyvw :
That's fascinating! I see the oil pickup, which helps orient things. I see the bevel gear that must go up to the fan drive, and the gear on the other jackshaft is much larger so that must be for an output shaft to the clutch.
Far out. I wonder if they had any gear clatter issues with running a spur gear between the crankshaft and the flywheel, or if the combination of center takeoff and 12-cylinder smoothness made it irrelevant. I also wonder if that's some sort of harmonic damper between that gear and the output shaft.
Looks like it's a 180 degree V12 and not a boxer, too.
Ian Anderson:
Gary said:
Wow, nice Thompson!
Hey model lady. Can you move out of the way? I want To see the Minigun.
Gary said:
Electric DEI?
Appleseed said:Gary said:
Electric DEI?
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