McCulloch MC-4 is a lightweight American twin-rotor helicopter developed in 1951 by the aircraft manufacturer McCulloch Aircraft Corporation.
The helicopter model McCulloch MC-4 was developed by an American aircraft manufacturer as a promising aircraft designed for operation in the US Armed Forces, in particular in the Navy. The helicopter had to perform various kinds of tasks related to reconnaissance, enemy detection, search operations, etc., however, despite its shape and the presence of two rotors, the aircraft of this model could not be used as a transport air vehicle, since the maximum take-off the weight of the aircraft was very limited, to a greater extent using a low-power propulsion system.
Despite the rather small overall dimensions of the helicopter, the aircraft was characterized by extremely low maneuverability, which was due to poor aerodynamics, due to the actual beginning of the era of helicopter construction, and the presence of two screws in the helicopter, which prevented the implementation of complex maneuvers.
The McCulloch MC-4 helicopter made its first take-off in 1951, however, the first test of this aircraft indicated several shortcomings that were not taken into account at the design stage, and therefore, before entering the serial production, the helicopter underwent some important design and technical changes.
Depending on the modification of the aircraft model McCulloch MC-4, onboard the helicopter can accommodate from two to 4 people, while some versions of this aircraft were optimized for the transport of small loads, however, the condition for this was to comply with the dimensions and not exceeding the maximum take-off the mass of the helicopter, which is about 900 kilograms.
The McCulloch MC-4 helicopter is equipped with a power plant consisting of one Franklin O-335-6 brand piston aircraft engine (depending on the modification of the aircraft), which, developing thrust of 200 hp, allows the aircraft to accelerate to a speed of 170 km \ h ., allowing you to fly at short distances limited to 320 kilometers.
- McCulloch MC-4 – the basic prototype of the aircraft;
- McCulloch MC-4A – a modernized pre-production version of the helicopter, sent for testing in the US Navy;
- McCulloch MC-4C – an experimental version of the helicopter, equipped with a Franklin brand aircraft engine;
- Jovair Sedan 4E – a civilian version of the helicopter, which allows transporting up to 4 people on board;
- Jovair Sedan 4ES – an improved version of the McCulloch MC-4E version, equipped with a Franklin 6A-335 aircraft engine (210 hp);
- Jovair Sedan 4A – agricultural version of the helicopter;
- McCulloch YH-30 – the military production version of the helicopter;
- McCulloch XHUM-1 – An experimental version of a military aircraft, created based on the McCulloch MC-4A version.
- Crew: 2 people;
- Capacity: 2 people (depending on version);
- Length: 9.75 m. (Depending on version);
- Height: 2.82 m. (Depending on version);
- The diameter of the rotor: 6.7 m. (Depending on version);
- Empty helicopter mass: 545 kg. (Depending on version);
- Maximum take-off weight: 900 kg. (Depending on version);
- Cruising speed: 150 km \ h. (Depending on version);
- Maximum flight speed: 170 km \ h. (Depending on version);
- Maximum flight range: 320 km .;
- Maximum flight height: 3200 m.;
- Powerplant: Franklin O-335-6 (depending on version);
- Power: 200 hp (Depending on version).