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

[Rcmaster199 at aol.com]

Wait a minute, we are not talking about flying Pattern with Decathlons and  
Cubs. Pattern models are supposed to be "thoroughbred" designs. We  have very 
few limits as to what we actually design in. On the other hand,  Scale models 
don't have that "free to design as you please"  luxury. 
 
Pattern planes have no excuses. I see no reason the desired features can't  
be designed in to facilitate desired outcome.
 
MattK
 
In a message dated 12/29/2004 5:10:04 PM Eastern Standard Time,  
d.pappas at kodeos.com writes:

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




 
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.f3a.us/pipermail/nsrca-discussion/attachments/20041230/4e320b8b/attachment.html