[NSRCA-discussion] APPARENT GEOMETRY (PARALLAXED VIEW)

[Keith Hoard]

I think this is what we all need. . .

http://www.eagletreesystems.com/Plane/5.htm



On 4/10/07, Ken Thompson <mrandmrst at comcast.net> wrote:
>
> You are correct Georgie, that is my most serious flaw...
> ----- Original Message -----
> From: george w. kennie
> To: NSRCA Mailing List
> Sent: Tuesday, April 10, 2007 4:53 PM
> Subject: Re: [NSRCA-discussion] APPARENT GEOMETRY (PARALLAXED VIEW)
>
> Yeah, Ken. Especially if the wind is blowing IN.
> G.
>
>
> ----- Original Message -----
> From: Ken Thompson
> To: NSRCA Mailing List
> Sent: Tuesday, April 10, 2007 7:36 AM
> Subject: Re: [NSRCA-discussion] APPARENT GEOMETRY (PARALLAXED VIEW)
>
> Even vertical lines will appear to fall away from you, or so I've been
> told...mine aren't that straight to begin with...
> ----- Original Message -----
> From: Ed Alt
> To: NSRCA Mailing List
> Sent: Tuesday, April 10, 2007 6:04 AM
> Subject: Re: [NSRCA-discussion] APPARENT GEOMETRY (PARALLAXED VIEW)
>
> And all the lines will bend and not appear straight,  Hey, I do that
> already!
>
> Ed
> ----- Original Message -----
> From: Fred Huber
> To: NSRCA Mailing List
> Sent: Monday, April 09, 2007 10:59 PM
> Subject: Re: [NSRCA-discussion] APPARENT GEOMETRY (PARALLAXED VIEW)
>
> The responsibility of the pilot s to PERFORM the corret geometry despite the
> parallax view.
>
> The responsibility of the judge is to learn how the parallax will make the
> correctly flown maneuver look.
>
> About the only way I can think of to show the effects of parallax on a
> correctly flown turnaround maneuver would be to film it from as close to
> perpendicular to the flight path as possible, and at the judges' location at
> the same time. then play the tapes sumultaneously at a judging seminar.
>
> At the appx 45 to 55 deg observation angle of the judges station, a 45 deg
> up/down line (half cuban) would appear steeper than what is actually being
> performed.  If it looks like a 45 from the judge's station (holding up a 9th
> gradeer's geometry class triangle), its too shallow.  The appearance of 60
> deg (same method) would be closer to actually being the 45 deg line.
>
> Note that if the pilot doesn't make use of the full box, the parallax will
> be reduced... and that's not downgradeable.
>
> Verticals should still look vertical.
> ----- Original Message -----
> From: rcmaster199 at aol.com
> To: nsrca-discussion at lists.nsrca.org
> Sent: Monday, April 09, 2007 10:11 PM
> Subject: [NSRCA-discussion] APPARENT GEOMETRY (PARALLAXED VIEW)
>
> A question has been posted from an IMAC gentleman (who is trying to write
> better IMAC rules) as to how Pattern people fly and judge skewed appearance
> of maneuvers at box ends or in center when tall maneuvers (Hourglass, Vert
> Sq 8, Rolling Ess, etc) are involved.
>
> Some of us have searched the book and found no wording written that
> describes what the pilots' responsibilities and the judges' responsibilities
> are in the performance of the skewed apparent geometry. There is a statement
> in the Judges Training tape in regard to end maneuvers.... that these will
> appear different even when accurately flown. The oness is essentially on the
> judges to know how the True Geometry should appear when flown at an angle to
> the eye, and must not downgrade for Apparent or Parallaxed appearance
> difference.
>
> Spoke with Don about this earlier today and we decided to present the
> question to the group and get some conversation going. We should be explicit
> in the book regarding how such Apparent Geometry should be treated....ie-
> what is the pilot's responsibility and what is the judge's. Description
> improvements could be written over the next couple rule cycles.
>
> The pilot's responsibility may appear easy.... they simply need to fly
> precise geometry per the book. True enough, BUT.....consider what is
> actually flown, especially by the top guys, and what scores well. These are
> not necessarily as precise as one might think. The better pilots tend to fly
> purposely flawed maneuvers that give the impression of precision.
>
> MattK
> ________________________________
> AOL now offers free email to everyone. Find out more about what's free from
> AOL at AOL.com.
>
>
> ________________________________
>
>
> _______________________________________________
> NSRCA-discussion mailing list
> NSRCA-discussion at lists.nsrca.org
> http://lists.nsrca.org/mailman/listinfo/nsrca-discussion
>
> ________________________________
>
>
> No virus found in this incoming message.
> Checked by AVG Free Edition.
> Version: 7.5.446 / Virus Database: 268.18.26/752 - Release Date: 4/8/2007
> 8:34 PM
>
>
>
>
>
>
> ________________________________
>
>
> _______________________________________________
> NSRCA-discussion mailing list
> NSRCA-discussion at lists.nsrca.org
> http://lists.nsrca.org/mailman/listinfo/nsrca-discussion
>
>
>
> ________________________________
>
>
> _______________________________________________
> NSRCA-discussion mailing list
> NSRCA-discussion at lists.nsrca.org
> http://lists.nsrca.org/mailman/listinfo/nsrca-discussion
>
>
>
> ________________________________
>
>
> _______________________________________________
> NSRCA-discussion mailing list
> NSRCA-discussion at lists.nsrca.org
> http://lists.nsrca.org/mailman/listinfo/nsrca-discussion
>
>
>
> ________________________________
>
>
> _______________________________________________
> NSRCA-discussion mailing list
> NSRCA-discussion at lists.nsrca.org
> http://lists.nsrca.org/mailman/listinfo/nsrca-discussion
>
>
> _______________________________________________
> NSRCA-discussion mailing list
> NSRCA-discussion at lists.nsrca.org
> http://lists.nsrca.org/mailman/listinfo/nsrca-discussion
>


-- 

Keith Hoard
Collierville, TN
khoard at gmail.com