[NSRCA-discussion] Bowtie

[Peter Vogel]

IMHO, yep.  In fact, It's really just the general case of the Double-I that
says the non-radius portion of the maneuver must be a square, so the
diameter of the half-loops = the length of the lines at the top and bottom
of the Double I.

On Tue, Jul 5, 2016 at 12:01 PM, Jeff and Claire via NSRCA-discussion <
nsrca-discussion at lists.nsrca.org> wrote:

> Thanks.  Same drawing applies to the hourglass if it were turned 90deg,
> right?
>
>
>
> *From:* NSRCA-discussion [mailto:nsrca-discussion-bounces at lists.nsrca.org]
> *On Behalf Of *Vicente Bortone via NSRCA-discussion
> *Sent:* Tuesday, July 05, 2016 8:26 AM
> *To:* chuenkan at comcast.net; General pattern discussion
> *Subject:* Re: [NSRCA-discussion] Bowtie
>
>
>
> I think this will make it more clear.
>
> [image: Inline image 1]
> 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 MemberSPA L-18, Board MemberOliver 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
> <nsrca-discussion at lists.nsrca.org>
> Date: 7/1/16 12:35 PM (GMT-06:00)
> To: NSRCA <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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-- 
Director, Fixed Wing Flight Training
Santa Clara County Model Aircraft Skypark
Associate Vice President, Academy of Model Aeronautics District X
Treasurer, National Society of Radio Control Aerobatics (NSRCA)
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