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stevo as b4 |
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stevo as b4 World Chat Champion
Joined: 17 Jul 2003 Karma :
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Octapode |
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Octapode Two Stroke Sniffer
Joined: 04 May 2018 Karma :
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Pete. |
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Pete. Super Spammer
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Posted: 22:29 - 24 May 2018 Post subject: |
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Loads of good reasons to put the cam chain at the end:
One less main bearing journal - lighter, shorter, stronger crank with lower inertia and therefore lighter narrower engine which can rev higher.
Camchain sprocket is by necessity small so if it's in the traditional position in the middle of the crank it limits the cross-section. You either have to suffer a skinny whip-prone crank or huge camshaft sprockets.
Even spacing on the cylinders and simplified/more efficient coolant passages.
Ease of assembly, not necessary to do a fully strip-down to change the cam chain. ____________________ a.k.a 'Geri'
132.9mph off and walked away. Gear is good, gear is good, gear is very very good |
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johnsmith222 |
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johnsmith222 World Chat Champion
Joined: 26 Dec 2008 Karma :
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stevo as b4 |
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stevo as b4 World Chat Champion
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Old Git Racing |
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Old Git Racing World Chat Champion
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stevo as b4 |
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stevo as b4 World Chat Champion
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barrkel |
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barrkel World Chat Champion
Joined: 30 Jul 2012 Karma :
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Posted: 13:36 - 25 May 2018 Post subject: |
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stevo as b4 wrote: | I've always liked things that are designed from an engineering superiority perspective and not a maintenance friendly or cost friendly one. |
Engineering is an exercise in trade-offs. Superior engineering is finding elegant solutions on multiple dimensions, where elegance is strongly related to efficiency and economy - less is more.
I expect engineering an engine needs to trade off strength vs weight vs material cost vs assembly cost vs wear vs maintenance. It's the solving for multiple constraints that makes elegance elegant, otherwise it's just brute force, or flimsy, or overpriced, or over-engineered, etc.
Quote: | Poxy little separate camshaft bearing caps on each cam isn't the most elegant design solution, but it's cheaper and easier I guess as well allowing easy removal of each cam separately. |
The engineering that most impresses me is little touches that make something fail in a safe way, or easier to work with when the covers are off, or harder to assemble incorrectly - things that the consumer doesn't normally notice, but someone paying close attention to the details can see the intelligence of.
For example, I really like the engineering of the IBM Proprinter, as explained in this video: https://www.youtube.com/watch?v=spDYSKl3kmo - this is superior engineering, in my book. ____________________ Bikes: S1000R, SH350; Exes: Vity 125, PS125, YBR125, ER6f, VFR800, Brutale 920, CB600F, SH300x4
Best road ever ridden: www.youtube.com/watch?v=s2MhNxUEYtQ |
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Old Thread Alert!
The last post was made 5 years, 338 days ago. Instead of replying here, would creating a new thread be more useful? |
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