Re: Starship rotors & drilling

[Jeremy R King <kingjer@eng.auburn.edu>]

I would imagine the fact that motorcycle rotors are exposed directly to a
fresh air stream would greatly influence your point.  In cars, the wheels
block direct flow, so the increased surface area and cross flow of air
(increasing the convection coefficient) would have a much larger impact.
Note these are my thoughts on the subject.  No math has been done.

Jeremy R. King
'86 VW Quantum GL5
Auburn University, Alabama, USA

On Tue, 16 Apr 1996, Hugh Odom wrote:

> I, too was under the impression that cross-drilling rotors was done for
> cooling purposes.
>
> A 2 wheeler-enthusiast friend recently showed me an article in a cycle mag
> where they claimed there was little or no cooling benefit from
> cross-drilling.  They claimed that the main benefit of cross-drilling is
> increased braking power under extreme conditions.  According to this
> article, the holes act like a cheese grater, shaving off the surface of the
> pad (which may get glazed under extreme conditions) exposing "fresh"
> friction material to rub on the flat surface of the rotor.
>
> Seems like there still might be an indirect cooling benefit by having the
> brakes work better and therefore be used less.  Your guess is good as mine.
>
> WHO
>
> 81 Coupe (gone but not forgotten)
> 91 Ford Ranger
> 53 Hudson Hornet (really)
> Hugh
>
> 81 Coupe (gone but not forgotten)
> 91 Ford Ranger
> 53 Hudson Hornet (really)
>