The Graupner Clou kit from mid 60s, provided wood for both a 74.5 in
wing (labeled "aerobatic wing") and an 99 ~ in. "thermal" wing.
Many early American kits followed fit.  I.e., Malibu 76". Monterey
100",Aquila 99.9", Drifter 72", Windrifter 99.8",Hobie Hawk 99",
Windfree 99.25", Wanderer 76" &99", Todi 76" or 100"….  And several
followed form as well. :-)  I am not sure just when the 2 meter
class became codified.  There was only one class at the first LSF
contest (1971) - held at the Nelson glider ranch, Livermore, Ca.
BTW, that same year, an early form of f3b was  flown at the NBSS
contest in Santa Rosa, Ca.  Regis

-- In [EMAIL PROTECTED], Chuck Anderson <[EMAIL PROTECTED]>
wrote:
>
> LSF first divided soaring into two classes sometime before 1973.
By
> 1973, the SOAR Nats had grown so large that they decided to adopt
the
> LSF class system in order to award more trophies without awarding
> trophies so far down the list.  After all, a fourth  place trophy
> sounds better than a 10th place trophy for the same score.  As I
> remember, 100 inch span was chosen because about half the fliers
had
> models with wing spans over 100 inches and there were a lot of
kits
> with wing spans between 90 and 100 inches on the market.  At least
> that was the explanation given when the SOAR Nats established
> standard class as models with wing spans up to 100 inches
according
> to an article published in Sailplane.  I could look it up but I am
> too lazy to search my collection of Sailplane magazines.  :-)
>
> Chuck Anderson





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