Displacement during snap rolls (was Why is it so quiet?)

[Dean Pappas]

Thanks Doug.
And yet we know that the full scale guys' snaps happen in geologic time, compared to us!
Imagine the plight of diving judges.
Maybe the solution is to "wimp-out" the snap description, and allow anything that looks like a train wreck ... NAAAAAH!
 

Dean Pappas 
Sr. Design Engineer 
Kodeos Communications 
111 Corporate Blvd. 
South Plainfield, N.J. 07080 
(908) 222-7817 phone 
(908) 222-2392 fax 
d.pappas at kodeos.com 

-----Original Message-----
From: discussion-request at nsrca.org [mailto:discussion-request at nsrca.org]On Behalf Of Doug Cronkhite
Sent: Wednesday, December 29, 2004 4:33 PM
To: discussion at nsrca.org
Subject: RE: Displacement during snap rolls (was Why is it so quiet?)


The rules for family 9.9 are as follows:
 
"Snap rolls represent one of the greatest challenges to judge. This is primarily due to two factors: (1) the "snapping" characteristics of different types of aircraft are unique; and (2), snap rolls are a high energy maneuver that occur very quickly. Snaps happen so fast, in fact, that is is virtually impossible for a judge to determine the exact order in which events occur, especially at the beginning of the snap. There are no criteria, therefore, for seeing nose and wing movement initiated at the same time as with the other autorotation family, Spins."
 
The rest of the paragraphs deal with snaps not autorotating through the complete revolutions and so forth but there is no criteria whatsoever for line displacement. This would be impossible to deal with actually since aircraft snap so differently from one type to another. A top level unlimited airplane like an Edge, Cap, or Sukhoi displaces very little, but people flying lower classes in Decathlons, Clipped Wing Cubs and so forth displace a great deal in a snap. There's just no way to fairly judge with a single standard across all aircraft types.
 
-Doug
 
 


 

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