[NSRCA-discussion] Bowtie

Tue Jul 5 12:51:35 AKDT 2016

This would be more clear if it were drawn with the square drawn at the high
and low points of the radii just like the double immelmann.

From: NSRCA-discussion [mailto:nsrca-discussion-bounces at lists.nsrca.org] On
Behalf Of Atwood, Mark via NSRCA-discussion
Sent: Tuesday, July 5, 2016 11:15 AM
To: Charlie Barrera; General pattern discussion
Subject: Re: [NSRCA-discussion] Bowtie

This is accurate, though it might be less confusing (when comparing to an
aresti if you do the same drawing but with the circles smaller, within the
original square drawing.  It will demonstrate the same thing (show that the
resulting shape is more rectangular) but without leaving the confines of the
original drawing. 

MARK ATWOOD

o.  (440) 229-2502

c.  (216) 316-2489

e.   <mailto:atwoodm at paragon-inc.com> atwoodm at paragon-inc.com

Paragon Consulting, Inc.

5900 Landerbrook Drive, Suite 205, Cleveland Ohio, 44124

 <http://www.paragon-inc.com/> www.paragon-inc.com

Powering The Digital Experience

On Jul 5, 2016, at 12:10 PM, Charlie Barrera via NSRCA-discussion
<nsrca-discussion at lists.nsrca.org> wrote:

Yep, the diagram in the KFactor was a little misleading. I think this is the
correct geometry.  

.Charlie

On Jul 5, 2016, at 9:25 AM, Vicente Bortone via NSRCA-discussion
<nsrca-discussion at lists.nsrca.org> wrote:

I think this will make it more clear.  

<image.png>
On Saturday, July 2, 2016, Phil Spelt via NSRCA-discussion
<nsrca-discussion at lists.nsrca.org> wrote:

Yes, Stuart, my maneuvers all look much better in PaintShop or PowerPoint
than they do in R/C airplane!

Phil Spelt, KCRC Emeritus
AMA 1294, Scientific Leader Member
SPA L-18, Board Member
Oliver Springs, TN  (865) 435-1476v  (865) 604-0541c

  _____  

Yup try to draw it with radii.  Only if your corners are points (pretty
tough on the plane) will the maneuver be square.  

I actually used Corel Draw where I could be sure all radii were equal to see
how it should look.  Now if I could only fly it that way :)

Stuart C.  

On 7/1/2016 1:49 PM, cahochhalter via NSRCA-discussion wrote:

The radius locations of the bowtie create a rectangle.

See attached drawings.

Drawing courtesy of Mark Hunt

Sent from my Verizon, Samsung Galaxy smartphone

-------- Original message --------
From: Verne Koester via NSRCA-discussion
<javascript:_e(%7B%7D,'cvml','nsrca-discussion at lists.nsrca.org');>
<nsrca-discussion at lists.nsrca.org> 
Date: 7/1/16 12:35 PM (GMT-06:00) 
To: NSRCA
<javascript:_e(%7B%7D,'cvml','nsrca-discussion at lists.nsrca.org');>
<nsrca-discussion at lists.nsrca.org> 
Subject: [NSRCA-discussion] Bowtie 

I just read the Judges Chair in the latest K-Factor regarding the Bow Tie in
Masters. Their opinion is that the overall shape of the maneuver should form
a rectangle rather than a square. I can't see how that's geometrically
possible. The center portion of the maneuver has two opposing 45 degree
lines. Assuming we want the baseline and top line height the same and we
want the maneuver centered, the 45 degree lines mandate an overall square
shape. The only way to make a rectangle out of it is to either fly an angle
of less than 45 degrees through the center or add short straight lines
before and after the 45's going into the radiuses into the verticals. The
illustration in the K-Factor showing how the Bow Tie should be shaped
illustrates this because the center angle lines in their rectangle drawing
are clearly less than 45 degrees. The Masters aresti shows the correct
overall shape and it's square.

Verne Koester  

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-- 
Vicente "Vince" Bortone
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