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*To*: quattro@coimbra.ans.net*Subject*: Re: A6 styling re A4/A8*From*: dan_masi@MENTORG.COM (Dan Masi)*Date*: Tue, 13 Feb 96 09:01:11 EST*In-Reply-To*: STEADIRIC@aol.com "Re: A6 styling re A4/A8" (Feb 12, 3:12pm)*References*: <960212151207_420735635@mail04.mail.aol.com>*Sender*: quattro-owner@coimbra.ans.net

> >with these numbers, I calculate that for equal volumes (we simply swap > >aluminum for iron) the iron rotor will be 2.9 times more massive. for equal > >masses, the iron rotor will heat 1 degK for each .48 degK the aluminum > >rotor heats. 2.9*.48= 1.392. So, a rotor of Al equal in volume to the > >original Fe rotor will be increase in temperature 40% more than the iron > >rotor for a given deceleration (energy input). What does the temperature profile look like, though? This doesn't take into account the far-superior thermal conductivity of Al, which will also dictate how efficiently the venting will work. Besides, I would guess that this is dwarfed by the savings in angular momentum due to reduced mass. Dan Masi

**Follow-Ups**:**Re: Al Rotors***From:*Noel Jason Bolduc <astros@WPI.EDU>

**References**:**Re: A6 styling re A4/A8***From:*STEADIRIC@aol.com

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