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*Inertia* · 24-11-2002

One other point. When the operating speed of a CD increases, the centripetal force (responsible for shattered discs) does not increase in a linear fashion, but as the square of the velocity of the disc.

Going from 40x to 52x is a 30% speed increase. That same change results in a 69% increase in centripetal force. The 8.3% speed change from 48x to 52x results in a 17.4% increase in centripetal force.

Not long ago 32x ATAPI devices were high speed devices. A 52x drive is 62.5% faster, but the radial forces trying to destroy the disc are increased 164% over the force on the 32x disc.

24-11-2002	#9 (permalink)
Inertia CDFreaks Resident Join Date: Jan 2002 Posts: 1,508	One other point. When the operating speed of a CD increases, the centripetal force (responsible for shattered discs) does not increase in a linear fashion, but as the square of the velocity of the disc. Going from 40x to 52x is a 30% speed increase. That same change results in a 69% increase in centripetal force. The 8.3% speed change from 48x to 52x results in a 17.4% increase in centripetal force. Not long ago 32x ATAPI devices were high speed devices. A 52x drive is 62.5% faster, but the radial forces trying to destroy the disc are increased 164% over the force on the 32x disc.