The Raven 257 was designed in Germany by Alec Clark of Wolfsberg Aircraft and production aircraft were due to be built in the Czech Republic by Evektor. The design was subsequently upgraded and renamed the Wolfsberg Letov Corvus 1F, this version making its first flight in June 2006. The Corvus 1F is aimed at the light utility market and particularly operators of the Britten-Norman Islander. It is also suitable as a parachuting transport, cargo freighter and medical transport. The Raven 257 is illustrated below. The Corvus 1F is illustrated below.

OK-RAV             c/n 1                Czech Republic

9 seat light transport first flown in 2000

Engines: 2X 300hp(223kW) Continental IO-550-N                                                                              Length: 40’4"(12.29m)                                                                                        Height: 13’1"(3.99m)Wingspan: 45’11"(14.0m)                                                                                                No.built: 1+ Range: 828miles(1325km)                                                               Cruising speed: 149mph(240kmh) Empty weight: 4185lb(1900kg)                                              Maximum take-off weight: 5954lb(2700kg)