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ACRO E-mail Archive Thread: Judging Loops


Thread: Judging Loops

Message: Judging Loops

Follow-Up To: ACRO Email list (for List Members only)

From: "Brian K. Howard" <BK at>

Date: Wed, 07 May 1997 22:30:04 UTC


  To all IAC Judges:

Please do NOT downgrade for drift during the execution of a loop or looping
maneuver. It is easy to see why some would think this is proper based on
the Rule Book wording in Section 8, but Paul Logue hit it square on when he
referenced paragraph 8.3, Wind Correction. The only reference which should
be made to the ground during a loop is to watch for the apex and nadir to
occupy the same X-axis coordinate in a perfectly wind-corrected (on the
X-axis only) loop. Damon Wack also highlighted an important point to be
careful of parallax in calling a loop "finished high" or "finished low"
when there is a strong cross box wind. Of course, this caution applies to
any figure which has a Y-axis dimension, for example, 180 and 360 deg turns
(with or without rolls).

At the beginning of the year, the Instructor Judges had a conference with
the Rules Committee and we confirmed the intrepretation that "no downgrade
shall be made for drift on the Y-axis during a loop." Anyone attending
Judges School this year should have heard it that way. If you need a
declaration more official than me, please ask the Rules Committee for
statement of clarification. 

I will publicize this position in the HEADS UP! column, but since I am
currently working the July column, a large chunk of the contest season will
be over before it's out. The confusing "vertical plane" wording will be
taken care of in the next rewrite of the Rule Book for 1998 (discussed in
the June column). 

In the meantime, let us, as Judges, consistently grade the loops so that a
competitor can fly the figure the same way whether in Texas or New York.

Paul Logue also made the valid point about there being very little
quantitative information on how to judge a loop. Use whatever system you
(the judge) feel is best to rate the loop, but use it CONSISTENTLY
competitor-to-competitor. There is nothing wrong with changing your system
as you become more experienced and your system evolves, but change it
between contests, not during! Clyde Cable and I will also be addresssing
this important (and confusing to new judges) topic in a future column.

BK Howard

Brian K Howard, CFI                voice: 937.434.7395
Editor, IAC Heads Up! Column       e-mail: BK at
FAI, National, & Teaching Judge
President, IAC Chapter 34
Extra 300/L, N343BH

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