Sikorsky S-61 is a multi-purpose American helicopter developed by Sikorsky Aircraft specialists in 1959.
The development of this type of aircraft was initiated by the U.S. Navy, and, initially, it was assumed that the Sikorsky S-61 aircraft would be an effective means of combat against submarines, in particular, it was supposed to equip the helicopter with the appropriate weapons (torpedoes and deep-sea bombs). Nevertheless, the Sikorsky S-61 helicopter did not receive much success in the military sphere, which was mainly due to a number of its technical characteristics, however, this aircraft was actively used in the field of civil aviation.
The Sikorsky S-61 helicopter is one of the few civil multi-purpose aircraft manufactured by Sikorsky Aircraft. In particular, a helicopter of this model ensures efficient operation in the field of passenger flights at distances of up to 835 kilometers, makes it possible to carry up to 3025 kilograms of payload on board, makes it possible to extinguish fires, serve oil fields, etc.
Depending on the modification, the Sikorsky S-61 helicopter is capable of carrying up to 32 people on board, including also two pilots, which in turn does not provide almost any of the aircraft of this type that existed at that time. The helicopter was operated and continues to be used today, by many air carriers to operate flights to hard-to-reach areas on local airlines, and due to its high load carrying capacity, this aircraft is also effective in transporting goods.
The power plant of the helicopter model Sikorsky S-61 consists of two General Electric CT58-140 gas turbine engines, each of which is capable of developing a thrust of 1,500 hp, which in turn provides the aircraft with a quite acceptable flight speed, which is about 267 at maximum capabilities km \ h. However, in some cases, this power plant can not cope with overload, and therefore the number of accidents involving a helicopter model Sikorsky S-61 remains quite high – according to experts, precisely because of this feature, the helicopter practically did not begin to be used in the military sphere.
- Sikorsky S-61L – civilian transport and passenger version of the helicopter;
- Sikorsky S-61L Mk II – A modified version with minor technical improvements;
- Sikorsky S-61N – a civilian version of the helicopter with the ability to land on the water;
- Sikorsky S-61N Mk II – A modified version of the version of Sikorsky S-61N;
- Sikorsky S-61NM – A modified version of the helicopter;
- Sikorsky S-61T Triton is a technically improved version of the helicopter (the main propeller has been changed, modern avionics is used, etc.).
Despite a fairly large age, a helicopter with more than 55 years of history continues to be effectively operated to this day.
- Crew: 2 people;
- Capacity: 30 people (depending on version);
- Length: 17.96 m. (Depending on version);
- Height: 5.32 m. (Depending on version);
- The diameter of the rotor: 18.9 m. (Depending on version);
- Empty weight: 5595 kg. (Depending on version);
- Maximum takeoff weight: 7332 kg. (Depending on version);
- Cruising speed: 222 km \ h.;
- Maximum flight speed: 267 km \ h.;
- Maximum flight range: 835 km .;
- Maximum flight height: 3810 m.;
- Powerplant: 2 × General Electric CT58-140;
- Power: 2 × 1500 hp