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Rotor Leasing

Helicopter Specifications

These are the specifications of a sample of aircraft Rotor Leasing has, or is currently performing restorations of.


BO-105 Specifications:

The Bo-105 is a light, twin-engine, multi-purpose helicopter developed by Bölkow of West Germany. It pioneered the rigid/hingeless rotorhead when it was introduced into service in 1970. Production of the Bo-105 began at the then recently merged Messerschmitt Bolkow-Blohm (MBB).

The main production facilities for the Bo 105 were located in Germany and Canada; due to the level of export sales encountered, additional manufacturing lines were set up in Spain, Indonesia, and the Philippines. MBB became a part of Eurocopter (now Airbus Helicopters) in 1991. Production ended in 2001 being supperceeded by the EC-135.

The main new design feture of the BO-105 was the four-blade main rotor, comprising rigid titanium head and flexable glass fiber blades with titanium anti-erosion strip and pendulous vibration damper on each blade. It utilizes a standard two-blade semi-rigid tail rotor. The main transmission utilises two bevel gear input stages with freewheeling clutches and a spur collector gear stage, planetary reduction gear; three auxiliary drives for accessories. The LS model introduced uprated transmission and Allison 250-C28 engines for exceptional hot-and-high performance, while the EC Super Five has new main rotor blades and other performance improvements.

The fuselage is a conventional light-alloy semi-monocoque structure of pod and boom type, glass fiber cowlings, and titanium sheet engine deck.The rigid rotor system required tandem fully redundant hydraulic system with an operating pressure of 103.5 bars, for powered main rotor controls. The entire rear fuselage aft of seats and under power plant is available as freight and baggage space, with access through two clamshell doors at rear. Two standard stretchers can be accommodated side by side in ambulance role.The configuration became very popular with the air-medical providers for a time. However, the very high vibration through translation makes transport of spine injuries troublesome. Eventually most air-medical providers replaced the BO-105 with smother and more modern helicopters such as the EC-135.

 Specifications for BO-105 CBS4 model

Country Of Origin: West Germany
Aircraft Crew: One or two pilots  
Transport Capacity: Four passengers or 2 stretchers and 2 attendants  
Aircraft Dimensions:  
Length: 38 ft 11 in (11.8 m)
  Rotor Size: 32 ft 3 in (9.8 m)
  Height: 9 ft 10 in (3 m) Low Skids
Aircraft Weights:  
Max T/O: 5,500 lb (2,500 kg)
  Fuel quantity: 160 Gal (570 l)
  Fuel types: Jet A, JP4, JP5, JP8
Aircraft Performance:  
Max Speed (VNE): 145 Kt (268 kmh)
  Range (no reserve): 361 nm (670 km);425 nm (784 km) AUX
  HIGE (max gross): 6,000 ft.
  Ceiling: 17,000 ft. (10,000 ft. above 2400kg gross weight)
  Powerplant: 2X Allison (Rolls-Royce) 250-C20B
Power: 420 shp