The “Souricette” is an old dream of Michel BARRY. This dream was to develop a minimum aircraft, but without concession to safety or piloting pleasure. Only the performances which, in his opinion, are never directly linked to safety and pleasure, could be sacrificed. This was done as soon as he realized that a rustic and relatively thin single-seat cell could be built with 80 kg of common wood and powered by a 12 HP motor. An internship in the USA made him discover the NACA 0417 profile and its astonishing finesse for Reynolds of 2106. This profile, initially studied for speeds of the order of 300 m/s (transonic speed), revealed an interesting operating peak around 30 m/s, where it was not expected and especially where no one had thought about using it! More efficient than the traditional and older NACA, it presented above all the same performance (fineness and maximum Cz) as thinner profiles (12 to 13%), whereas it, 17% thick, made it possible to achieve a higher spar (170 mm for 1 m of rope) and therefore lighter (about 10 kg less for each half-wing) compared to NACA equipment by 13%.
Despite the fog and the snow, Michel BARRY carried out, aboard the "Souris-Blanche", a simple jump on the runway of FERTE-ALAIS, on February 13, 1993. The next day, the feast of SAINT VALENTIN obliges, the weather being more favourable, our friend Michel BARRY was able, for more than an hour, to make changes which revealed the excellent flying qualities of the machine and its perfect tolerance to the most unusual situations!