Larry, I mis-spoke (Notching the piston for power)

[fahrvegnugen at cox.net (David Utley)]

> 
> From: "Larry Fry" <rocco16@sbcglobal.net>
> Date: 2004/09/12 Sun PM 04:27:54 EDT
> To: "David Utley" <fahrvegnugen@cox.net>, 
> 	<scirocco-l@scirocco.org>
> Subject: Re: Larry, I mis-spoke (Notching the piston for power)
> 
> This sounds very much like the old racers trick of drilling the edge of the
> piston with the hole going into the top ring land.  The theory behind this
> was that it provided a "direct" path for combustion pressure to force the
> top ring agains the cylinder wall with greater force, providing a better
> seal/more power.
>   This theory was around for a long time (as was the practice) but, to my
> knowledge, was never substantiated through scientific comparisons.  The fact
> that it isn't popular any longer tells me that there was little real basis
> for the theory.
> Another old wives tale, in other words.
> Larry

No, that is not what I am describing.  What I am suggesting is putting dimples in the piston face, not the perimeter...  Air at speed does not do well with 90 degree, much less 180 degree changes of direction.  These dimples, or pockets of air, create a cushion of air that acts as a buffer.  As the air travels over the surface of something, the air is slowed by the difference in speed of the two.  The pockets acts a buffers in this regard, allowing the air to travel more quickly across the surface.  

I tried to find something via Google, about jetliners with hail damage actually flying faster, but could turn up nothing...  You have seen the commercial for Lexus, haven't you?  I might find more if I looked at golf ball history, I don't know...  What I do know is that this works...  :-)

Cheers,
  David


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