WOW! Kang, you better get your checkbook ready - I can almost hear the
"Aces" digging out their prized motor sticks now <Grin>
LeRoy Cordes YOLO
Chicago, Illinois
AMA 16974 - WAA Pilot #337
In God We Trust
On Fri, 14 Dec 2012 22:05:32 -0000 "Yuan Kang Lee" <ykleetx_at_gmail.com>
writes:
>
> A Braced EZB Challenge: Glory, Fun, and Fortune
>
> Rules:
>
> This challenge allows the use of wood bracing to be added to the
> solid wood motor stick of the EZB. The intent of this proposal is
> to remove the frustration of the weak motor stick so the EZB flier
> can focus on other aspects required for advanced EZB flying.
>
> 1. For any braced EZB model that passes the 30-minute mark, the
> flier will be added to the 30-minute EZB Club of "A History of EZB
> Flights." You will also receive $100 if your model weighs 0.6 g or
> above and $75 if your model weighs less than 0.6 g. (One prize per
> person per model weight class.) Note: if you have already made a
> previous 30-minute EZB flight, you must build and fly a new model to
> qualify for the challenge.
>
> 2. The flier who has the highest time in the 0.6g or more weight
> class will receive an additional $250 -- his flight time must be
> 31:00 or more. The flier who has the highest time in the sub 0.6g
> class will also receive an additional $250 -- his flight time must
> be 32:30 or more.
>
> 3. If your EZB breaks an AMA Open record (Cat I, II, III, IV), you
> will be added to the Record Club of "A History of EZB Flights." In
> addition, you will receive $100. (One prize per person, per
> Category)
>
> 4. All flights must be at an AMA-sanctioned (or FAI-sanctioned)
> contest or record trial. Processing of model by contest director is
> required. Photos of motor stick bracing must be provided. You must
> announce your flight attempt to me 7 days prior to your attempt.
>
> 5. Models, bracing techniques, fliers, etc. will all be documented
> in an article to be submitted to Free Flight Quarterly. Your glory
> will be widely known.
>
> 6. The Braced EZB Challenge starts December 15, 2012 and finishes
> September 30, 2013.
>
> All rules are subject to change by me at any time, but it is not
>
> Background: The EZB event was originally introduced in 1961 as an
> entry level event, a "dumbed down" version of the many complex
> microfilm and paper models flown at that time. It quickly gained
> popularity because it was easier and quicker to build. At first,
> the EZB model weighed around 2.0 g, and it was a sturdy model.
> Competition pressure would quickly bring the weight down. In 1968,
> Jim Richmond's Kokomo Bomber EZB weighed a svelt 0.74g. Model
> weights remained in the 0.75 g to 1.2 g range for the next 25 years.
> In the mid 1990's Larry Coslick brought down the EZB weight to
> nearly 0.5 g. Throughout the 1990's, the EZB was often the most
> popular event flown at USIC, with nearly 100 contestants.
>
> Today, the EZB is not a popular event. It is one of the least
> popular events. In order to be competitive at the national level,
> an EZB must weigh 0.45 g or less. Larry Coslick, Jim Richmond, Max
> Zaluska, and Yuan Kang Lee have successfully flown 0.3 g EZBs at
> national contests. Recently, the AMA Cat IV record was set using a
> 0.24 g EZB.
>
> The EZB model becomes more challenging to build and fly when it is
> around 0.5g and below. Many can't or decide not to build so light.
> But perhaps a bigger challenge is that the light EZB is often
> plagued by a motor stick that is not stiff enough and suffers under
> higher torque launch conditions. Instead of being a positive
> challenge, the weak motor stick becomes a source of frustration and
> a barrier to continued effort.
>
> By rule, the EZB motor stick must be solid wood, which means bracing
> is not allowed. This rule makes the EZB motor stick easy to build.
> But there is a caveat. You can't just use any motor stick you cut
> up -- you have to go through many candidate sticks before you find
> one light and strong enough. We have heard of the travails of many
> EZB fliers who have gone through hundreds of motor sticks before
> finding one that is good enough.
>
> In contrast, an expert event like F1D uses a rolled motor tube for
> light weight, and the use of boron and bracing for added stiffness.
> The resulting motor stick is light and incredibly stiff. I have
> never heard of a F1D builder who has to go through hundreds of
> rolled tubes to find one that is stiff enough. In fact, almost
> every rolled tube is sufficiently stiff once it is reinforced with
> boron and tightened with bracing.
>
> This challenge allows the use of wood bracing to be added to the
> solid wood motor stick of the EZB. The intent is to remove the
> frustration of the weak motor stick so the EZB flier can focus on
> other aspects required for advanced EZB flying.
>
>
>
>
> ------------------------------------
>
> Yahoo! Groups Links
>
>
>
>
>
LeRoy Cordes YOLO
Chicago, Illinois
AMA 16974 - WAA Pilot #337
In God We Trust
____________________________________________________________
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Received on Sun Dec 16 2012 - 08:46:34 CET