Designed at the request of Theodor Croneiss to supply his new airline venture which was to become Nordbayerische Verkehrsflug (NOBA),[1] it was a conventional high-wing cantilevermonoplane with fixed tailskid undercarriage. The prototype was built of wood, although production examples would have a metal structure.[2] The design was praised in its day for the cleanness of its aerodynamics, lightness of construction, and economy of operation[3][4]
The first M 18 to enter service with NOBA was provided by Messerschmitt in exchange for a 49% share of the new company, and on 26 July it began commercial flights.[5] NOBA's early successes enabled the company to place orders for additional examples of an improved model, the M 18b. It would eventually purchase twelve of these,[1] but manufacturing them would exceed the capacity of Messerschmitt's own small firm, leading to a merger with Bayerische Flugzeugwerke (BFW) in 1927. Following NOBA's reorganisation into DEVAG in 1931, a small number of a further-improved version, designated M 18d, were ordered, but the type was soon superseded by the similar but larger Messerschmitt M 20.[2]
three-seat production version with 60 kW (80 hp) Siemens-Halske Sh 11 engine (two built)
M 18b
Messerschmitt M.18b photo from Les Ailes December 15, 1927three/four-seat production version with 82 kW (110 hp) Siemens-Halske Sh 12 engine (12 built)
M 18c
photographic survey version with 164 kW (220 hp) Armstrong Siddeley Lynx engine (two or three built)
M 18d
enlarged six/seven/eight-passenger version, produced with a variety of engines, including the 164 kW (220 hp) Armstrong Siddely Lynx, 112 kW (150 hp) Walter Mars and 240 kW (320 hp) Wright Whirlwind. (eight built)
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