MBB BBH
Rotor
The design was started in 1968 after a request for proposals for an armed escort helicopter (Bewaffneter Begleithubschrauber, or BBH) was issued by the BMVg (deadline for submission was July 1969).
* requirements:
* Speed: 375 km/h (200 kt)
* Maximum rate of climb: 20 m/s (65.6 ft/s)
* Maximum hover altitude: of 2,500 m (8,200 ft) out of ground effect.
* Capacity: two seats
* Take-off weight: < 6 t (13,230 lb)
* All-weather capable
* Armored around the crew and the most important components
MBB studied two designs, designated BBH 1 and BBH 2.
* BBH 1 with small wing
* Speed: 375 km/h (200 kt)
* Rotor: a six-bladed rotor
* Take-off weight: 5.7 t (12,600 lb)
* BBH 2 with large wing, a fan-in-fin tail rotor, and a pusher propeller on the tail.
* Power: two Daimler-Benz DB 720, GE T58, or Lycoming T53 engines
* Cruise Speed: 385 km/h (208 kt)
* Rotor: four-bladed hingelessrotor
* Take-off weight: 5.9 t (13,000 lb)
The helicopter was designed to escort transport helicopters and attack enemy tanks. Both designs could carry various types of armament: one or two machine gun(s) in a revolving turret, a movable cannon, Home-on-Target (HOT) missiles, and rockets.
Although the original plan expected the prototypes to fly in mid-1972 and series production to begin in 1975, the projects were never funded for development. After additional design studies, a Memorandum of Agreement between Germany and France in 1979 - ten years later - began the development of the PAH 2 (Panzer abwehr Hubschrauber = anti tank helicopter), now known as the Eurocopter Tiger, roll out of the first serial production machine on March 22 2002.
http://www.aiaa.org/tc/vstol/unbuilt/mbb/index_r.htmlBBH-2 Pic:
