04/30/2019. Remarks by Johan Visschedijk: "In 1946, Lucien Tiélès built the prototype of a two-seat high-wing tail wheel monoplane - the B.50 Muscadet, powered by an 100 hp Renault engine. Registered F-WBBG it first flew on October 13, 1946. It was redesigned as the four-seat B-60 Mercurey with a higher rear fuselage decking and an 140 hp Renault 4 Pei engine, making its first flight on April 3, 1949.

Tiélès established the Société Boisavia to build the aircraft commercially and most production units were the B.601L with a 190 hp Lycoming flat-four engine. With the same airframe the company was able to produce small numbers of other versions with different engines and Mercurey production continued until the middle of 1962 with virtually all sales being made in France or its overseas territories. Serial numbers from c/n 1 to 5, c/n 18 to 29, c/n 51 to 55 and c/n 100 to 116. In addition, the various prototypes had unique serial numbers.

Boisavia also built the B.80 Chablis parasol-wing two-seater, which was intended for kit production by amateur builders. A more ambitious venture was the B.260 Anjou light twin, which was intended as a competitor for the Piper Apache. Only a single prototype was built and the design passed to SIPA (Société Industrielle pour l'Aéronautique). The following Boisavia models were built (numbers in brackets):

B.50 Muscadet. Three-seat strut-braced high-wing cabin monoplane with fixed tail wheel landing gear, and an 100 hp Renault 4 Pei engine. Prototype F-WBBG c/n 01 first flown October 13, 1946. Later F-WCZE. (1)
B.60 Mercurey. Four-seat development of B.50 with wider rear cabin and built up rear fuselage decking. Prototype F-WFDV c/n 01, first flown April 3, 1949. (3)
B.601 Mercurey. B.60 with 190 hp Lycoming O-435-A engine. Prototype F-BFON c/n 01. (3)
B.601L Mercurey. B.60 with 190 hp Lycoming O-360-C engine. (27)
B.602 Mercurey. B.60 with 165 hp Continental E-165-4 engine. Prototype F-BAIM c/n 1. (1)
B.602A Mercurey. B.60 with 213 hp Continental O-470-11 engine. Prototype F-BIUP c/n 116. (1)
B.603 Mercurey. Prototype F-BFRJ c/n 01. First flown April 11, 1951. (1)
B.603R-II Mercurey Special. B.60 with 240 hp Argus AS.10-C3B engine. (5)
B.604 Mercurey II. B.60 with lengthened fuselage for glider towing, powered by 230 hp Salmson 9ABC engine. F-WGVE c/n 02. First flown January 6, 1954. (1)
B.605 Mercurey. B.60 with 170 hp Regnier 4L-O2 engine. Prototype F-BGVF c/n 1. (4)
B.606 Mercurey. B.60 with Regnier 4L-O0 engine. (1)
B.80 Chablis. Tandem two-seat open-cockpit parasol-wing monoplane with 65 hp Continental A-65 engine. Prototype F-WBGO c/n 01. First flown July 16, 1950. (2)
B.260 Anjou. Low-wing four-seat cabin monoplane with retractable tricycle landing gear and two 170 hp SNECMA Regnier 41 engines. Prototype F-WHHN c/n 01. First flown June 2, 1956. (1)