Allison's patent was  approved on  March 6th 1956.  The  kite languished  in this form    with the  possibility of the  use of   plastic film for  the  sail,    from 1956  until  about  1962  when  Frank  H. Scott of Ohio noticed an advertisement in a model aircraft   magazine.    As   with many  advertisement    of   a     small nature,    no photographs  appeared  only line   drawings  as   the     cost    for print    plates   of  photographs   were usually  high.     With only  the   image of  the sketch to  go   by  Frank   built one  of  his   own  design.  Frank been a kite  enthusiast  soon   found  ways   to improve on  Allison  design.   A vent was added  to the lower half   of   the  kite and  the  sides  were   made    parallel instead   of   the   windsock  taper  that Allison  incorporated  in   his   design, Scott    retained    the   three spars   in    the   original    design. Scott's   modifications  made  the  kite more  stable   and    efficient    flyer. Because  of  the  kites'  simplicity  to build and requiring no tail  to  lengthen or shorten to tune for stable flight  and no bridle  adjustments needed,   a novice could have one  in flight from  the first try.    Frank's  father,   Walter   Scott was  so enthusiastic about  the  flexible kite that he built many and sent them  to friends  in  other parts  of  the  world. He sent  one  to  Bob  Ingraham, founder of   Kite   Tails:     The    Kiteflier's magazine,  A  short    article   in   the magazine  by  Bob Ingraham  in  1964  put Allison's concept  and   Scott's   design on  the world  stage. Frank  Scott called his modified  kite  a sled  because  it  flew  well   and   was flexible  making it a  Flexible  Flyer  a brand  name for  a  snow  sled  that  was popular with children that  was   blessed with  snow in  the  winter  months.

 It never occurred to Scott to  call his kite a  sled because of  the  shape  of   it's  keels   while   in   flight.     If   the airborne shape had influence  him  he may have called  his creation a Bonnet  Kite, as  the  shape    resembles    an   early pioneers'  bonnet that were worn  by  the ladies of that era.

Webster's     dictionary : 
 The  word  polymorphic  : Poly  :  meaning,  many. Morphic : pretaing  to  form a  combining  form   meaning   characterized    by    a (specified)     type    of     formation. Polymorphic  having  or  occurring  in  several distinct forms.

Allison   reference  to  his    flexible  kite  as a  polymorphic appeared  to  be  a  prophecy of  things to come,   as the word poly meaning many,  which there have been  of   his    design.      Morphic : characterized  by  a (specified)   type of  formation.   His  concept  has  taken  on other forms.

Allison's design in flight.                             Allison's basic layout pattern.

Scott retained the three spare (spine) of the original  design. The centre spar was used to stiffen the flexible canopy to prevent the the leading edge of the canopy from folding and causing the kite to collapse. The  sides  were   made    parallel instead   of   the   windsox  taper  that Allison  incorporated  in   his   design. A triangular vent was added, this force high-pressure air from below the sail into the turbulent airstream above the sail, serving to stabilise the Sled's flight.
Frank Scott designed a flexible  kite for Ray Holland to manufacture in 1967. The name Scott Sled is the title  for the kite, registered to the company. The original size 40 inches by 35 1/2 inches. Three spares and a triangular vent are used. Colour of Polyethylene sail is yellow.
Flexible Flyer sled, the brand name that influenced Frank Scott to call his improved version of Allisons' flexible  kite a Sled.

Original Scott Sled Width when spread flat  40" Length  35 1/2"
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