Bell HSL – American military anti-submarine helicopter, developed in 1953 by the aircraft manufacturer Bell Helicopter.
The design of the Bell HSL military anti-submarine helicopter, also called the Bell Model 61, began in 1950. The initiator of the launch of such a project was the US Navy, which needed high-quality and efficient air means used to detect and destroy enemy submarines and submarines. Moreover, due to the design features of the aircraft of this model, the Bell HSL aircraft could also be used for other purposes, for example, for search and rescue operations, transportation of people and heavy cargoes on board.
The first test tests of the Bell HSL model helicopter were carried out by Bell Helicopter aircraft manufacturers in 1953, however, due to a number of technical omissions, the control of the aircraft was very difficult, as a result, development continued, and only in 1957, this aircraft was officially submitted.
The helicopter refused to be very effective in terms of its operational capabilities, in connection with which, 50 aircraft of this model was delivered to the US Navy, which was operated until the end of the 70s of the last century.
The helicopter’s armament consists mainly of anti-aircraft torpedoes and deep charges, and as an independent combat unit for combating ground and air targets, this tool is not effective.
Onboard the Bell HSL aircraft can accommodate up to 24 people, including four crew members and 20 fully equipped military personnel. Nevertheless, as such, the helicopter was not used to transport people, however, it could also carry out the transportation of various kinds of cargo, including large-sized ones, the only condition for which was not exceeding the helicopter’s maximum take-off mass of 12 tons.
The Bell HSL helicopter is equipped with a power plant consisting of one 18-cylinder radial aircraft engine of the brand Pratt & Whitney R-2800-50, which is capable of developing a thrust of 2400 hp, which provided the aircraft with a high load rating. The use of two bearing rotors provided the aircraft with improved stabilization during flight, while the maximum speed of this helicopter was 185 km / h.
- Bell XHSL-1 – experimental prototypes of an aircraft;
- Bell HSL – the main production version of the aircraft;
- Bell D-116 – a design version of the civilian version of the helicopter;
- Bell D-216 – a design version of the helicopter with increased payload;
- Bell D-238 is an improved design version of the Bell D-216 version.
- Crew: 4 people;
- Capacity: 20 people (depending on version);
- The length of the helicopter: 11.9 m. (Depending on version);
- Helicopter height: 4.42 m. (Depending on version);
- The diameter of the rotor: 15.7 m.;
- The mass of the empty helicopter: 5890 kg. (Depending on version);
- Maximum takeoff weight: 12000 kg. (Depending on version);
- Cruising speed: 160 km \ h.;
- Maximum flight speed: 185 km \ h.;
- Maximum flight range: 565 km .;
- Maximum flight height: 3920 m.;
- Powerplant: Pratt & Whitney R-2800-50;
- Power: 2400 HP