Militi started to build his design for a flying-boat glider in October 1964 and it first flew on 13 August 1967. The M.B.1 is a parasol-wing monoplane with a two-step hull and a fuselage of aluminium alloy, wood and fibreglass. The mixed construction wing is supported by two N-struts in the centre and a vee-strut outboard on each side, it has plain ailerons but no flaps. The pilot has an open cockpit with a small windscreen. From 1969 Militi developed a powered version as the M.B.2 Leonardo which first flew in 1970.