[NSRCA-discussion] Proposed rule change

[Verne Koester]

Also prevents flops. 

In a Figure M with a stiff crosswind blowing in, if the pilot allows the plane to drift as it approaches the stall (in this case in), the plane is going to be blown in toward the flight line. With a Figure M, that scenario is repeated twice. Transitioning to actual vertical immediately before the stall followed by a slight push (or pull) to re-establish track will result in less drift and help maintain your line. The smart pilot will do that anyway regardless of what the rules say because it avoids needing the more dramatic push or pull to re-establish track as Mark pointed out which is usually downgraded severely. 

In the same stiff crosswind blowing in, transitioning to actual vertical immediately before the stall prevents the tail from being blown out which always results in a flop and the resulting zero or severe downgrade depending on the judge's interpretation of the rules.

There ya go. I've provided enough ammo to keep this thread going for days, maybe weeks.....  ;>)

Verne

-----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 1:13 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
--------------------------
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----- 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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