SPRATT 103

History
The aerodynamic formula used (the simplest and safest existing), which could be called “articulated or living wings”, is ignored or forgotten by most aeronautical specialists. Yet it is, paradoxically, one of the oldest manners of flying, even recommended by Octave Chanute (known as “the Father of Aviation”) in 1902 and, finally, nearest to that of the birds, which fly regularly in turbulent air conditions and yet never stall or get into spins.
Reminder of “living wing” aircrafts :
Perfect machines cited, then also censored by the medias (paid by fixed-wings aircraft ads…)

Clic on pictures and links to read details :

1914 : Louis de Monge modifies classic airplane
With variable incidences wings, elastically suspended

 

1929 : Henri Mignet realizes the HM 2, HM 6 and HM 9

But must abandon this concept due to the Marcel Leyat patents and therefore realizes the Flying Fleas with the fixed rear wing

1913 à 1938 : Marcel Leyat realizes the Helica

+ other ‘living wings’ machines > Video

1939 : George G Spratt realizes the Spratt 107

Seaplane named ‘Controlwing’ > Video

1974 : George G Spratt realizes the Spratt 105

Land version of the ‘Controlwing’

1983Georges Briffaud realizes the GB 10 ‘Flying Flea’

“The roll control by differential pivoting of the front wings was very satisfactory, with a total absence of adverse yaw.” (AVIASPORT 01/84 + Cahiers du R.S.A. 12/83)

1990 : Freewing realizes different machines

(based on G Spratt researches), then is bought by french Matra Aerospace, which since block this concept…