Description Re: Snap rolls (MK clipped for repost)

[Rcmaster199 at aol.com]

Can't really do that Bobby. The Snap itself is but an element in a larger  
maneuver. 
 
"Yaw Induced displacement in flight path" OR Lateral displacement in flight  
path" is better verbiage, I agree. That's what was meant
 
Matt
 
In a message dated 12/30/2004 9:46:40 PM Eastern Standard Time,  
rcaerobob at cox.net writes:

Good suggestion, Matt.  But I think it's important to clarify and  
differentiate "Yaw" displacement (which I interpret as angular deviation in  yaw) form 
"Track displacement" (which I propose to be the overall "sideways"  shift of 
the track of the CG that occurs as a result of the snap).
    To me, those are two different animals;  I say NO  angular yaw offset 
permitted, but lateral TRACK displacement okay...up to how  much may be a hair to 
split by those so inclined.
 
Personally, I think we change the Snap scoring to 0 or 10, and be done  with 
it.

Bob Pastorello
NSRCA 199  AMA 46373
_rcaerobob at cox.net_ (mailto:rcaerobob at cox.net) 
_www.rcaerobats.net_ (http://www.rcaerobats.net/) 
 
 

----- Original Message ----- 
From:  _Rcmaster199 at aol.com_ (mailto:Rcmaster199 at aol.com)  
To: _discussion at nsrca.org_ (mailto:discussion at nsrca.org)  
Sent: Thursday, December 30, 2004 7:40  PM
Subject: Description Re: Snap rolls (MK  clipped for repost)


I agree Ed, snaps are not that hard to define. And it isn't hard to  describe 
the judging. Several of us (Dean, Dave and Earl to name 3) have  tried to do 
exactly that and all have done a pretty good job. 
 
What has been hard, at least the last three times the Snap subject has  come 
up, is to get consensus. Well, forget consensus, try common ground.  

Let's take a different approach and try to add to the existing  description. 
The existing description includes the following,:
1- starts with definite break in pitch attitude.
2- stalled maneuver
3- tail inscribes cone
4- CG continues on same flight path as prior to entry.
5- there are several rulebook things that will zero the maneuver
 
Now for some adders:
1- should any displacement in yaw be allowed before downgrading? How  much 
displacement? Personally I think less than half wingspan (3 feet) is  reasonable 
buffer. (Forget about design differences in Pattern. It's a  thorougbred 
event and designers should have all parameters optimized)
2- how much displacemnt in pitch should be allowed before  downgrading? Again 
I think less than half wing span (3 feet) is  reasonable
3- how about snap rate? slower, more graceful vs faster, more  violent snap- 
should it be a judged criterion? I believe that fast  snaps and slow snaps 
should have equal footing.
 
Not specifically an adder per se',  what about KFactro for these  maneuver 
types, as Ron suggested earlier? Personally, I don't think a change  is 
warranted but is worth looking into to see where folks stand.
 
I challenge all who wrote to the earlier thread, to put their creative  caps 
back on and help nail down the snap's description more definitely.  Add to my 
list or start your own. Then lets put it all together and propose  it to the 
Contest Board. IF it passes, then help spread the word to all who  are not 
online.
 
MattK




 
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