A few additions:
Bo 70 – helicopter project (no details; only two references: FLUG REVUE May 1965 on page 18, and “Typenhandbuch der deutschen Luftfahrttechnik” by Lange on page 247)
Bo 125 – proposal for an European transport helicopter of the third generation (1981)
Bo 140 – tiltwing project in civil (Bo 140Z) and military (Bo 140M) configuration (see http://www.secretprojects.co.uk/forum/index.php?topic=271.0)
Bo 205 – two-/three-seat light aircraft project (1962), developed to the LFU (=Leichtflugtechnik-Union) LFU 205 V3
Bo(?) 207 – the same source (“Ludwig Bölkow und sein Werk – Ottobrunner Innovationen” by Gersdorff) uses consequently the designation Bölkow 207 (without Bo), four-seater was founded on the Klemm Kl 107 C, first flight on 10 Oct 1960
Bo 208 “Junior” – license production of the Swedish MFI 9
Bo 209 “Monsun” – serial production (100 aircraft were built, plus a single aircraft in 1973/74) of the amateur aircraft MHK 101 V2
Bo 210 – other designation for the projected MHK 102 V1
Btw, designation system of (the most) German aircraft manufacturers don’t use hyphens, so the correct spelling is Bo … (not Bo-...)
