Snap Switch

[george kennie]

As usual, "right on", Verne!!! And concise too!

Verne Koester wrote:

> Gray,You have to follow the track of the plane. As the nose is pitched
> with elevator, stalling the plane, the application of aileron and
> rudder will initiate the rolling part of the maneuver. At that point,
> the whole mass is rotating around a point that probably isn't even on
> the plane but is on the original track the plane was on when it was
> started. With proper setup and execution (requiring lots of practice)
> it IS possible to have it end up back on track and heading, but there
> will be a shift to one side or another. As long as track and heading
> are maintained, such as a 45 degree downline, the radius of a loop, or
> a simple straight line depending on the maneuver being performed,
> there should be no downgrade. The main things to watch for is a
> defined break in pitch and the cone-shaped rotation near the
> tailfeathers. Get all of that and you've definitely got a snap. After
> that, it's all track, heading, and positioning that determines the
> score. As a judge, it's just about impossible to see the side to side
> shift on a maneuver done stage center. I'll bet we'd all be surprised
> if we watched it from on end! Verne
>
>      ----- Original Message -----
>      From: Gray E Fowler
>      To: discussion at nsrca.org
>      Sent: Tuesday, April 13, 2004 1:32 PM
>      Subject: RE: Snap Switch
>
>
>
>      Okay someone please explain this........
>
>      A "proper" snap will change the aircraft's
>      "heading/line".     If the aircraft's line is off 15 degrees
>      it is a 1 point downgrade.  These two things do not mesh. It
>      means there is no such thing as a 10 snap, unless the
>      heading change is less than 7.5 degrees for a 1/2 point down
>      grade?
>      If it is impossible to score a 10, then maybe the wording
>      needs to change to allow for a heading/line  change.
>
>
>      Gray Fowler
>      Principal Chemical Engineer
>      Composites Engineering
>
>
>

        "Poole, Mark" <mpoole at harris.com>
        Sent by: discussion-request at nsrca.org          To:
                                               discussion at nsrca.org
        04/13/2004 12:19 PM                            cc:
        Please respond to discussion                   Subject:        RE:
                                               Snap Switch
>
>
>
>      This is exactly what was taught in the IMAC judging school I
>      attended last year, conducted by Fred Johnson, who was the
>      chief judge at the TOC and also is an IAC judge.   A
>      properly executed snap will displace the aircraft from it's
>      original line.
>
>      Mark
>
>      Ed Deaver wrote:
>      Not sure if this has been discussed, but Isn't there a thing
>      with snaps called Displacement, meaning as a break occurs to
>      initiate the snap, a slight change in aircraft position,
>      will occur.  If this slight change in lateral movement
>      doesn't take place than it can be argued it wasn't a snap.
>      Some may say heading changed but I'm thinking that the
>      heading and angle stay the same, just the entire event
>      shifts or displaces the plane laterally. What say the pilots
>      in the know?? ed
>
>      BUDDYonRC at aol.com wrote:
>      Wayne
>      Yes, the heading change is a downgrade-1 point per 15
>      degrees off heading, A barrel roll is not a snap and earns a
>      0.
>      Buddy
>
>
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