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Date: Sun, 08 Jul 2007 22:59:41 -0400
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From: gerardoconnell@optusnet.com.au
Subject: Re: [LML] Re: Main gear doors-Lancair 320

Scott, the "buffeting" is more an audible phenomenon-the airplane sounds like a tractor !! The noise starts instantaneously and abates with reducing airpseed below about 120 kts It also disappears instantaneously when gear is selected down (thus the door moves away from the fuselage).
Dominic flew underneath in his Lancair and detected just a slight "bulge" in the left main gear door but could not appreciate the vibration visibly.


> Sky2high@aol.com wrote:
> 
>  
> In a message dated 7/6/2007 12:02:23 P.M. Central Daylight Time,  
> gerardoconnell@optusnet.com.au writes:
> 
> buffeting in flight
> 
> 
> Gerard,
>  
> Please explain the "buffeting in flight"
>  
> The Lancair 300 series aircraft can experience laminar flow on the  
> bottom of 
> the wing up to 60% aft of the leading edge.  The cockpit closeout  rib 
> is at 
> about BL21, the outboard gear door hinge is at about BL48, or 27"  of 
> 127" of 
> wing (per side) - or about 21% of the wing span.  It should be  an 
> interesting 
> experiment.
>  
> BTW, remember the increase in  noise, drag and air into the  cockpit 
> when the 
> gear is lowered?
>  
>  
> Please explain the "buffeting in flight"
>  
> Scott Krueger  AKA Grayhawk
> Lancair N92EX IO320 SB 89/96
> Aurora, IL  (KARR)
> 
> Darwinian culling phrase: Watch  This!
> 
> 
> 
> 
> ************************************** See what's free at 
> http://www.aol.com.