[NSRCA-discussion] Proposed rule change

[John Fuqua]

Don proposes what we now do with spin entry.  Once the crab/attitude is
established you maintain that until the stall and disregard drift.  Makes
sense to me.

Also I like the move to generating clear definitions and downgrades in a
single section and referencing them in the manuerver description.  I need to
remind all that if we go to not having schedules in the rulebook that will
probably end the practice of describing each and every maneuver with its
downgrades and go to something more generic based on types of maneuvers,
spins, line, loops, part loops, etc.

-----Original Message-----
From: nsrca-discussion-bounces at lists.nsrca.org
[mailto:nsrca-discussion-bounces at lists.nsrca.org] On Behalf Of Atwood, Mark
Sent: Saturday, October 10, 2009 12:13 PM
To: 'nsrca-discussion at lists.nsrca.org'
Subject: Re: [NSRCA-discussion] Proposed rule change

Hey Don, 

I'm not sure I agree.  To properly wind correct Up AND down, in a strong
headwind, the model has to transition through vertical in the stall. I.e. It
only makes sense to BE vertical at the point of stall. 

Use a stick model and you'll see what I mean.  If your leaning 15 deg into
the wind at the point of stall, and then yaw 180deg, you'll be canted 15 deg
DOWN WIND immediatly following the stall. This would require a serious push
or pull to get the model properly wind corrected for the downline.   That
transition has to occur somewhere. Seems only appropriate that it be the
center of the stall.  This presents the best, and therefore scores the best.


-m
--------------------------
Sent from my BlackBerry Wireless Handheld


----- Original Message -----
From: nsrca-discussion-bounces at lists.nsrca.org
<nsrca-discussion-bounces at lists.nsrca.org>
To: 'General pattern discussion' <nsrca-discussion at lists.nsrca.org>
Sent: Sat Oct 10 12:17:25 2009
Subject: [NSRCA-discussion] Proposed rule change

What do you guys think of this rule change for stall turns?

 

In the Judge's Guide Page RCA 20 of Regulations under "Stall Turns": 

Change  1.. Lines must have exactly vertical and horizontal flight paths.
To

1.  Horizontal lines must be wings level and parallel to the flight line.
On entry vertical lines must be wind corrected to establish a vertical
track.  The wind corrected attitude of the model must not be changed as the
stall is approached and any wind drift is not cause for downgrade unless the
model drifts out of the maneuvering area.

 

In the maneuver descriptions under "Figure M with or without Rolls" 

Change downgrade 1 from "Model not vertical at start and finish of rolls and
stall turns" to

 

1.  Horizontal and vertical lines must be flown as described under "Stall
Turns" in the Judge's Guide above.

 

In the maneuver descriptions under "Stall Turns with or without Rolls" 

Change downgrade 3 from "Model track not vertical at start and finish of
rolls and stall turn"  to

 

3.  Horizontal and vertical lines must be flown as described under "Stall
Turns" in the Judge's Guide above.

 

 

Here's the logic behind the change:

 

Once a crosswind becomes stronger than the speed of the model the model can
no longer maintain a vertical track even if turned 90 degrees into that
wind.  Stall turns flown as described in the changes always score better
with the majority of judges.  This change brings the stall turn in line with
the spin in allowing some wind drift of the model as it slows and provides a
much more consistent judging standard.

 

 Don

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