[NSRCA-discussion] PowerPoint Presentations

[Don Ramsey]

Adam,

404-2:    The stall turn must be in the direction of flight.
404-7:    The humpty is defined as 1/4 roll up and 3/4 roll down.  That's 
3/4 down and not 3 of 4.
404-12:  Slow roll should be a minimum of 3 seconds
404-18:  AMA rule on snaps is on page 78 of the rulebook.  You can get to 
the rulebook through the judging site where the Powerpoint presentations are 
found.  But in a nutshell:
1. Since the maneuver is defined as a stall maneuver (initiated by a rapid 
stall of the wing induced by a change in pitch attitude), the nose of the 
fuselage should show a definite break from the flight path in the direction 
of the snap (positive or negative) while the track closely maintains the 
flight path. The track visualized as the path of the Center of Gravity (CG) 
should ideally follow the geometric flight path of the maneuver while the 
nose and tail autorotate through opposite helical arcs around the flight 
path. A snap  that does not show a break and stall to initiate the snap, but 
does enter a stalled attitude during the maneuver is severely downgraded.

So
* lack of a definite break of the nose is not a zero but severe downgrade
* track of CG should ideally follow the geometry of the maneuver for max 
points
Other Points:
* Barrel roll or axial roll is a zero
* Speed of snap is not a judging criteria
* Airspeed may decrease in the snap with no downgrade
* If model is roll to a finish the downgrade is applied using 1 pt per 15 
degree rule.

Don


----- Original Message ----- 
From: "Adam Glatt" <adam.g at sasktel.net>
To: "NSRCA Mailing List" <nsrca-discussion at lists.nsrca.org>
Sent: Sunday, July 02, 2006 10:29 AM
Subject: Re: [NSRCA-discussion] PowerPoint Presentations


> Good stuff, Don.  These are very helpful for learning a schedule that
> you don't fly.
>
> I have a few questions about judging Masters that I recommend should be
> answered on the presentation.
>
> 404-2:  Does the stall turn itself have to rotate in the upwind direction?
> 404-7:  There seems to be an option here, but 2of2 has the same name as
> 1of2, though the Arrestis are different.
> 404-12:  What is the rule book definition of 'slow?'
> 404-18:  The rulebook definition/description of a snap?
>
> -Adam
>
> Don Ramsey wrote:
>> For those who may be judging Advanced, Masters, P-07 and especially
>> F3A wednesday judges for F-07 there are PowerPoint presentations on
>> the NSRCA judging page
>> http://www.nsrca.org/competition/judging/judging.htm.  Look for the
>> link near the bottom of the Judging Home Page.
>>
>> Don
>>
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