[3] He continued to build designs of this type as well as more conventional aircraft until his death in 1933,[4] after which his patent rights were purchased by the Société Française de Construction Aéronautique (SFCA).

Ahead of the cockpit, and on some examples behind it, the upper surfaces were inwardly dished to improve the pilot's view and there was a cut-out in the wing trailing edge for the same reason,[6] much bigger than that shown in L'Aéronatique.

[7] The Taupin had a 22 kW (30 hp) Mengin C air-cooled flat-twin engine, sometimes referred to as a Poinsard after its designer, in the nose with its cylinders exposed and supplied from a fuel tank in the fuselage.

[7] The exact date of the Taupin's first flight is not known, though it was before late October 1935 when it took part successfully in the 1935 Tour de France des Prototypes.

This had a 45 kW (60 hp) Regnier[6] inverted inline engine, wings with duralumin tube spars and side-by-side seats.

[13] Immediately after World War II SFCA introduced the metal framed Lignel 44 Cross-Country, which had dimensions slightly larger than the Taupin 5/2, a 55 kW (74 hp) Régnier 4 D2 inverted inline engine and a new, enclosed cabin fuselage; the seats, accessed by side doors, were still under the trailing edge of the wing though without a cut-out.

[18] In November 1937 a Taupin 5/2, re-engined with a 67 kW (90 hp) Régnier and flown by both Clément and Claire Roman set several French altitude records for aircraft with engine capacity between 2 and 4 L (120 and 240 cu in).