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

[pilotlars at yahoo.com (Lars Bruchmann)]

boeing just issued new job openings.. for 11 year olds
with ball-peen hammers.... to whack the hell out of
all their new aircraft before they go into the paint
shop.  ;)
--- David Utley <fahrvegnugen@cox.net> wrote:

> Responses within...
> > 
> > From: Lars Bruchmann <pilotlars@yahoo.com>
> > Date: 2004/09/14 Tue AM 12:05:50 EDT
> > To: David Utley <fahrvegnugen@cox.net>,  Larry Fry
> <rocco16@sbcglobal.net>, 
> >   scirocco-l@scirocco.org
> > Subject: RE: Re: Larry, I mis-spoke (Notching the
> piston for power)
> > 
> > i have never heard of hail-damaged aircraft flying
> > faster, except maybe for the pilots trying to get
> the
> > aircraft to the ground before it is destroyed
> > completely.  modern aircraft have super-critical
> wing
> > and fuselage shapes, the boundry layer is
> extremely
> > close to the surface.  dimples would not help.  
> > the dimples in a golf ball create an 'artificial
> > boundry layer' which lets the ball fly farther. 
> 
> Here is where the dimples can help, by creating an
> artificial boundry layer...
> 
> > aircraft have VGs (vortex generaters), strakes and
> > fences on wing surfaces to do the same thing. 
> > a dirty aircraft will not fly as fast, since the
> dirt
> > actually raises the boundry layer, and creates
> drag. 
> > a wet aircraft will not fly as fast either.  ice
> is
> > the worst, there is a type of ice that forms,
> which is
> > kinda dimpled, and it is really bad news.  so, as
> far
> > as i'm concerned, dimples are bad for aircraft. 
> but
> > they could be great for indian cars! :-) 
> 
> All the examples you listed extended upward from the
> surface, and/or added weight, and this would not
> help.  The dimples would be inward, so this would
> not be an issue in that regard...
> 
> You are more savy with planes, and the like...  I
> invite you to do some research in this area.  I have
> tried, but I am not as knowledgeable here as you, so
> you prolly have a better idea of where to look...
> 
> Hope that helps explain it a bit more...  Maybe...
> 
> 
> Cheers,
>   David
> 
> > --- David Utley <fahrvegnugen@cox.net> wrote:
> > 
> > > 
> > > 
> > > -----Original Message-----
> > > From: Larry Fry [mailto:rocco16@sbcglobal.net]
> > > Sent: Monday, September 13, 2004 9:21 PM
> > > To: fahrvegnugen@cox.net;
> scirocco-l@scirocco.org
> > > Subject: Re: Re: Larry, I mis-spoke (Notching
> the
> > > piston for power)
> > > 
> > > Why do we care how fast the intake air travels
> > > "across the piston"?  Once
> > > it's inside the combustion chamber, it's a moot
> > > point, since the old-tech
> > > design of our engines is not of the 'high-swirl'
> > > type anyway.
> > > As usual, I'm a bit skeptical of stuff like
> > > this....but, when I hear of
> > > Roush, or Yates, or Lingenfelter dimpling their
> > > pistons I will reverse my
> > > postion.
> > > :)
> > > Larry
> > > 
> > > Larry,
> > >   They would have, had they been doing NASCAR
> back
> > > in the eighties.  You
> > > know, like when our cars were made?  Besides,
> the
> > > argument that our cars are
> > > too old-tech a design to benefit seems weak as
> well.
> > >  Megasquirt is about as
> > > new as it gets, and I think that all here that
> have
> > > experience with it would
> > > argue that it is VERY beneficial...  Besides,
> yours
> > > is a 16V, yes?  It is
> > > high enough a compression to benefit...
> > > It seems our arguments as of late seem to be
> more
> > > about logic and sophistry,
> > > rather than engineering...  What's up?  :)
> > > 
> > > David
> > > >   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
> > > 
> > > 
> > > _______________________________________________
> > > Scirocco-l mailing list
> > > Scirocco-l@scirocco.org
> > > http://neubayern.net/mailman/listinfo/scirocco-l
> > > 
> > 
> > 
> > 
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> 



		
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