*** Youtube/Video thread ***

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Circumference = 2 x pi x radius ;)

Yes, I know.

7 inch disc:

Circumference = 2 * 3.142 * 7 = 43.988 inches
Speed at 10,000 rpm = 10,000 * 43.988 * 60 = 26392800 inches per hour
12 inches per foot, 5280 feet per mile, so speed is 416.55 mph

12 inch disc:

Circumference = 75.408 inches
Speed at 10,000 rpm = 714.09 mph.

Neither of those is 357 mph. How do you get 357 mph?

EDIT: 6 inch disc would be 357 mph.
 
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i dont know much about engines but damn this sound nice

They've had the billboard posters up for the new R8. What a motor - and that video has sealed it. I want one.

Just to be clear - 'wanting' and actually 'having' are two very different things, and not at all linked in my world :o
 
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