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Posted by: Ferg Feb 22 2010, 01:34 PM

BMW S1000RR motorcycle engine cutaway at 14,200 RPM


https://www.youtube.com/watch?v=VSDa-EUT3ZE&feature=player_embedded



Making 193bhp and 83lb/ft of torque, the 2010 BMW S1000RR is the most powerful 1000cc production bike on the market.

Posted by: davidj Feb 22 2010, 02:10 PM

WoW!! Thats wild. See the valve springs and retainers rotating?

Posted by: nykthebartender Feb 22 2010, 02:16 PM

I feel like I should have safety glasses on.

Posted by: Todd Enlund Feb 22 2010, 06:11 PM

Not only that, but the one on the right, the retainer is floating off the spring enough to rotate independent of the spring.

Posted by: ahdoman Feb 22 2010, 06:13 PM

That rotation is interesting. I don't know if they actually switched directions or if it's a result of the RPM's outdoing the FPS of the video.

Posted by: kwales Feb 23 2010, 09:10 AM

An education on resonance modes.

You can see the spring coils go through a series of resonance modes as the engine is accelerating- (coil gaps changing)

And the system goes through resonance modes as shown by the changing rotation of the spring and retainer.

A variable strobe light would have shown more.

Posted by: Mr.242 Feb 23 2010, 09:31 AM

All I see is............

Where would we be without YOUTUBE?

What will we get to see in another 20 years! The library is growing daily.


True on other comments.....