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ACRO E-mail Archive Thread: [Acro] Re: 2003 proposed Knowns

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ACRO E-mail Archive Thread: [Acro] Re: 2003 proposed Knowns


Thread: [Acro] Re: 2003 proposed Knowns

Message: [Acro] Re: 2003 proposed Knowns

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

From: Steve Pennypacker <spenny at>

Date: Mon, 12 Aug 2002 23:35:25 UTC


  Folks, I think we've found the next author of the "Stick & Rudder" column :-)

As if Brian doesn't already do enough for IAC.


On Monday, August 12, 2002 4:10 PM, Brian Howard [SMTP:BK at] wrote:
: Frank,
: >           FWIW, looking at the proposed Sportsman 2003 a bit closer.  Aren't
: >figures 6, and 8 so similar as to be almost redundant?
: To be sure, the initial pull to 45-degrees, half-roll and entrance to the 
: looping portion will be flown the same in both figures. The difference, of 
: course, is in the exit. In Figure 8 (reverse Half-Cuban), you release the 
: back pressure to end the loop at the 5/8th point with lots of energy and 
: maintain that energy into the full loop. Figure 6 (Goldfish) requires you 
: to maintain the round loop until the 3/4 point (remember the looping 
: portion in both figures should be wind-corrected to appear perfectly round 
: to the judges), set a nice 45-degree up line for the judges to study, and 
: then PUSH out to upright, horizontal flight with low energy. There is NO 
: requirement that the two 45-degree lines in Fig. 6 be the same length, so 
: you only have to draw the second line long enough to show the judges and to 
: achieve the energy level you want for entry into the Split-S (Fig. 7). You 
: will need rudder (right for Lycoming, left for Vedenev) as you push to 
: horizontal (the slower you are, the more rudder you'll need). Because 
: you'll be flying up a 45-degree line (P-factor) and finish slow and 
: therefore nose-high at the end of #6, you'll also find maintaining heading 
: to be a challenge. In fact, you could be considerably off-heading and not 
: even realize it until you pull down for the Split-S. Heading control is 
: much less of an issue with #8 because once you come over the top of the 
: loop, you have the ground in sight throughout the remainder of the figure.
: Timing the initial pull on both figures will be something you must work on 
: so you won't go out of the box during the looping portion. Fortunately, 
: there are only two figures on each entry line so positioning isn't too 
: critical. However, be careful not to initiate #8 too soon or you may have 
: trouble fitting #9 and #10 in the box (though any wind will help you with 
: that).
: Bottom line: yes, the two figures are similar, but hardly redundant. Each 
: presents its own challenges and requires slightly different techniques.
: Happy practice!
: Best regards,
: Brian Howard
: Chairman, IAC Rules Committee


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