Henri Mignet published book Le sport de l'Air 1928 and designed (presumably 13) aircraft before HM.14 (6 September 1933) which took world by storm as Flying Flea. Post-war continued to develop original (dangerous) design with workshop at São Paulo (formed company Avioes Mignet do Brasil 1952) producing HM.310; later returned to France, at Caen and finally (1961) St Romain de Benet, producing HM.290/293/351/360/380/381/390.