Süddeutsche Flugzeugwerke V/STOL Rotorcraft
Süddeutsche Flugzeugwerke K.E. Merckle KG (Germany)

Merckle M-133 compound helicopter

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Merckle E 130 Rotor
In 1966, the BMVg awarded a series of systems analyses studies for helicopter speed improvement.
Peter Richter was the project manager. Dr. Just was an advisor to the project.
The M-133, intended to conduct the flight tests.
  • Power: two Daimler Benz DB 720/PTL 6 turboshaft engines, each with 1,500 kW (2,000 hp) to drive the main and tail rotor; in addition, each engine was connected to an aft fan to augment forward propulsion
  • Rotor: five-blade rotor, automatic reduction of blade angle at positive flapping angle or automatic increase of blade angle at negative flapping angle.
  • Speed: 580 km/h (313 kt)
  • Gear: a retractable landing gear
  • 2-side-view
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Merckle M-133 Rotor
The M-133 demonstrators were to use the two Bo 46 fuselages. For hovering and low-speed flights, the engines drove the rotor. At high-speed flights, the main rotor was offloaded and additional thrust was produced by the aft fans.

at the end of 1967, all BMVg projects for high-speed helicopters were declined
  • Power: DB 730/ZTL 6 engines with 993 kW (1,350 hp)
  • Rotor: diameter 11.00 m (36 ft)
  • Speed: 545 km/h (295 kt)
  • Length: 12.36 m (40.6 ft)
  • Width: 6.65 m (21.8 ft)
  • Maximum Take-off Weight: 3,100 kg (6,800 lb)
Merckle M-133 compound helicopter
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    Sources:
  • The V/STOL Encyclopedia Series: Volume 1 Germany 16 July 2001.
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