[NSRCA-discussion] APPARENT GEOMETRY (PARALLAXED VIEW)

Tue Apr 10 14:42:04 AKDT 2007

I have heard the recording from that can be fed to Realflight and your 
entire flight replayed from any view the sim offers. (which means anywhere 
you place a camera when editing the field in G3.5)

You can download a "model" of Chip Hyde's Genisis E-conversion for 
RealFlight G3.5 from the KnifeEdge Software site. (maker of the actual 
simulator)  And there's info on making a photofield of your home flying 
site.

That leaves... waiting for someone to put the logger in thier plane and run 
it through all the sequences.
(Not me.. I'd just give examples of how many downgrades you can get)

----- Original Message ----- 
From: "Keith Hoard" <khoard at gmail.com>
To: "NSRCA Mailing List" <nsrca-discussion at lists.nsrca.org>
Sent: Tuesday, April 10, 2007 5:08 PM
Subject: Re: [NSRCA-discussion] APPARENT GEOMETRY (PARALLAXED VIEW)

>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
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>
> -- 
>
> Keith Hoard
> Collierville, TN
> khoard at gmail.com
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