[NSRCA-discussion] Correct Geometry on N -> 6 side loop

[Glen Watson]

Oh boy here we go just before the NATS.

 

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From: nsrca-discussion-bounces at lists.nsrca.org
[mailto:nsrca-discussion-bounces at lists.nsrca.org] On Behalf Of Richard Lewis
Sent: Tuesday, July 08, 2008 12:47 PM
To: General pattern discussion
Subject: Re: [NSRCA-discussion] Correct Geometry on N

 

Note that there is a similar effect of radii on six side loops.  The bigger
the radius, the narrower the maneuver becomes relative to the overall height
due to the width being measured from tangent to tangent on the radii and the
height being measured flat to flat.  A properly flown six sided loop with
any radii will always appear slightly egg shaped...

 

Richard

Chad Northeast <chadnortheast at shaw.ca> wrote:

Hi Bob

Ahhh damn radii, forgot about that :)  You are correct, the height is
truncated because of the radius....larger they are the more it truncates the
height.

Here is a cad sketch.  In this case the radius is 5% of the vertical line
length.  Visually it looks appropriate for the size of the maneuver.

Chad

----- Original Message -----
From: Bob Richards <bob at toprudder.com>
Date: Tuesday, July 8, 2008 9:24 am
Subject: Re: [NSRCA-discussion] Correct Geometry on N
To: General pattern discussion <nsrca-discussion at lists.nsrca.org>

> Unless my geometry is wrong (and I was really good at geometry 
> in schooll) then the only way it can be a square is if the 
> corner radii are = 0.  It should always be a little wider than 
> it is tall. If not, then the diagonals are not 45 degree lines.
>  
> Draw it on paper, or with CAD, and you will see.
> 
> Bob R
> 
> --- On Tue, 7/8/08, Chad Northeast <chadnortheast at shaw.ca> wrote:
> 
> 
> Its definitely a square,
> 
> Basically you have two 45x45 right triangles with the right 
> angle vertex's (the 90's) intersecting.
> 
> In that case the vertical lines are twice the length of each 
> triangles horizontal length (when oriented as an hourglass), 
> therefore two of them equal the height of the verticals....and a 
> square you have!
> 
> The 45 lines end up being about 1.4 times longer than the 
> vertical lines, if you fly the correct geometry.
> 
> Chad
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