[NSRCA-discussion] Suggested New Snap Roll (Brake Roll)Description

[patterndude at tx.rr.com]

Given all the natural differences among planes and styles it seems clear that some are applying personal criteria that can't universally be applied. Also, its very possible many of the snaps generally accepted as good may not be autorotations at all (especially on uplines and other angles or positions where the forces are far from straight and level), so why does the definition try to define something we don't do?

How about if we just make this simple to judge and boil it down to this: A "snap", for maximum points, is a rapid rotation where the fuselage makes a clear break in heading from its track for the duration of the roll but the general track does not change. 

If the track barrel rolls, it is the wrong manuver it is downgraded 10. If the heading does not remain deviated for the entire roll it is downgraded 1 pt per 15

Lance
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-----Original Message-----
From: Keith Black <tkeithblack at gmail.com>
Date: Fri, 16 Oct 2009 00:03:41 
To: General pattern discussion<nsrca-discussion at lists.nsrca.org>
Subject: Re: [NSRCA-discussion] Suggested New Snap Roll (Brake Roll)
	Description

How about this definition:

A snap-roll (or break roll) is a rapid autorotation roll where the
model aircraft is in a stalled
attitude, with a continuous high angle of attack.
At the start of a snap-roll, the fuselage attitude must show a
definite break and separation from the
flight path, before the rotation is started, since the model aircraft
is supposed to be in a stalled
condition throughout the maneuver, If the stall/break does not occur
and the model aircraft barrel rolls
around, the maneuver must be severely downgraded (more than 5 points).
Similarly, axial
rolls disguised as snap-rolls must be severely downgraded (more than 5 points).
Snap-rolls can be flown both positive and negative, and the same
criteria apply. The attitude
(positive or negative) is at the competitor’s discretion. If the model
aircraft returns to an unstalled
condition during the snap-roll, the maneuver is severely downgraded
using the 1 point/15 degree
rule. Snap-rolls have the same judging criteria as axial rolls as far
as start and stop of the rotation, and
constant flight path through the maneuver is concerned.


On Thu, Oct 15, 2009 at 11:09 AM, Martin X. Moleski, SJ
<moleski at canisius.edu> wrote:
> Vicente,
>
>> Thanks for the suggestions.
>
> De nada.
>
>> Remember that I write in Spanglish so I am
>> sure that there are more mistakes. Read and read again.
>
> Me gusta mucho.  ;o)
>
>                                Marty
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> NSRCA-discussion mailing list
> NSRCA-discussion at lists.nsrca.org
> http://lists.nsrca.org/mailman/listinfo/nsrca-discussion
>
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