Scoring Vs Judging

[Tony Stillman]

Vicente:

Here is my outlook on snaps....

The issue here is that different models will give different looks when
stalled.  The judging VIDEO is pretty good here.  If you don't have a copy,
get one from Maureen Dunphy (NSRCA Secretary).  The "break" really means a
change from flying to stalled that occurs abruptly.  In normal flying, the
track of the model and the attitude of the model is generally the same.
But, like flying a vertical line in a crosswind, the model must track
vertically to score well.  This requires the pilot to apply a correction
into the wind so the track of the model is vertical, but the attitude of the
model is angled into the wind.  Getting the model to "break" is actually
very difficult to do using the elevator only.  If you give a quick input of
elevator, the model will not "break" off the track, but will just move to
the new track!  This is one of the qualities of flying low wing-loading
models.  You really have to put some controls out in the breeze to stall
them!  The rotation of the snap is around the CG of the model, but with the
nose of the aircraft above (or below in a negative) the line of flight of
the model.  That is, the track of the model is different than the direction
that the nose is pointed in.  This is the "break", or change in attitude of
the airplane from the track.  This will give a "cone-shape" to the rotation
of the tail, so it will look very different than that of a regular aileron
roll.  This is the signature of a true snap, the rotation of the tail.

The bottom line is that models will give different looks when stalling and
snapping.  Even the same model can give a different look if you stall it at
different speeds!  So, I agree with others saying that you can't be too
picky on what you WANT to see in a snap.  I suggest you look to make sure
the tail is moving in a cone-shape, not just pivoting as in an aileron roll.

Judging snaps can be difficult......



Tony Stillman
Radio South
3702 N. Pace Blvd.
Pensacola, FL 32505
1-800-962-7802
www.radiosouthrc.com
----- Original Message ----- 
From: <VicenteRC at aol.com>
To: <discussion at nsrca.org>
Sent: Tuesday, June 10, 2003 3:22 PM
Subject: Re: Scoring Vs Judging


> Thanks Tony:
>
> It is interesting to read that both rules are similar in concept.  My
opinion is that the chances to show a definitive "break" are a lot less when
you use the snap switch only.
>
> I am flying Advance and the 45 degree with snap presents a lot better when
I try to show the break.  For me break is high speed stall before any other
input.  Is this a possible definition of "break".
>
> Vicente
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>


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