/ Bell 47 / H-13 Sioux
Bell 47 / H-13 Sioux
Crew: 1 or 2
Capacity: 1 passenger or 2 litters (1,057 lb (479 kg) payload)
Length: 31 ft 7 in (9.63 m)
Height: 9 ft 3 in (2.82 m)
Empty weight: 1,893 lb (859 kg)
Max takeoff weight: 2,950 lb (1,338 kg)
Powerplant: 1 × Lycoming TVO-435-F1A six-cylinder vertically mounted horizontally-opposed air-cooled piston engine, 280 hp (210 kW)
Main rotor diameter: 37 ft 2 in (11.33 m)
Main rotor area: 1,085 sq ft (100.8 m2)
Maximum speed: 91 kn (105 mph, 169 km/h)
Cruise speed: 73 kn (84 mph, 135 km/h)
Range: 214 nmi (246 mi, 396 km)
Rate of climb: 860 ft/min (4.4 m/s)
YR-13/HTL-1 – 28 Bell 47A helicopters procured by the United States Army Air Forces for evaluation.
The YR-13 was powered by a 175 hp (130 kW) Franklin O-335-1 piston engine.
10 of the aircraft were evaluated by the U.S. Navy as trainers.
YR-13A – 3 YR-13 aircraft winterized for cold-weather testing in Alaska.
Redesignated YH-13A in 1948.
HTL-2 – US Navy equivalent of the commercial Model 47D.
HTL-3 – US Navy equivalent of the commercial Model 47E, powered by a 200 hp (149 kW) Franklin 6V4-200-C32 engine.
H-13B – 65 aircraft ordered in 1948 by the U.S. Army.
All Army versions were later named Sioux.
YH-13C – One H-13B used as engineering test bed.
Fitted with skid undercarriage and open, uncovered tail boom.
H-13C – 16 H-13B aircraft converted to carry external stretchers in 1952, with skid landing gear and open tail boom of YH-13C.
H-13D – Army two-seat version based on commercial model 47D-1, with skid landing gear, stretcher carriers, and Franklin O-335-5 engine.
OH-13E – H-13D configuration with three-seat aircraft with dual controls.
XH-13F/Bell 201 – Modified Bell 47G powered by a Continental XT51-T-3 (Turbomeca Artouste) turbo shaft.
The first Bell helicopter powered by a turbine engine.
OH-13G – Three-seater based on commercial model 47-G.
Introduced a small elevator on the tail boom.
265 delivered to US Army.
OH-13H/UH-13H – Based on 47G-2. Equipped with a 250 hp (186 kW) Lycoming VO-435 engine.
At least 453 acquired by US Army.
UH-13Hs were used by the U.S. Air Force.
UH-13J – Two Bell 47J-1 Rangers acquired by the U.S. Air Force for VIP transport of the U.S. President. Originally designated H-13J.
OH-13K – Two converted H-13Hs with a larger diameter rotor and a 225 hp (168 kW) Franklin 6VS-335 engine for test evaluation.
TH-13L – Originally designated as the Navy HTL-4.
HTL-5 – Utilized a Lycoming O-335-5 engine.
TH-13M – Incorporated a small movable elevator.
Originally designated as the Navy HTL-6.
HH-13Q -Originally the HUL-1G, it was used by the U.S. Coast Guard for search and rescue.
UH-13R – Powered by an Allison YT63-A-3 turboshaft engine.
Original US Navy designation HUL-1M.
OH-13S – Three-seat observation helicopter based on 47G-3B to replace the OH-13H.
265 received by US Army.
TH-13T – Two-seat instrument trainer for the U.S. Army based on the 47G-3B-1, powered by 270 hp (201 kW) Lycoming TVO-435-D1B. 411 purchased.
Sioux AH.1 – General purpose helicopter for the British Army, 50 built by Agusta (Agusta-Bell 47G-3B1) and 250 built by Westland (Westland-Agusta-Bell 47G-3B1).
A small number also used by 3 Commando Brigade Air Squadron of the Royal Marines.
Sioux HT.2 – Training helicopter for the Royal Air Force, 15 built by Westland.
Texas Helicopter M74 Wasp – Texas Helicopter Corporation single-seat conversion of OH-13E helicopters for agricultural use, powered by 200 hp (150 kW) Lycoming TVO-435-A1E engines.
Texas Helicopter M74A – Texas Helicopter Corporation single-seat conversion of OH-13H helicopters for agricultural use, powered by Lycoming TVO-435 engine rated at 240 hp (180 kW) for 2 minutes.
Texas Helicopter M79S Wasp II – Texas Helicopter Corporation conversion for agricultural use, with tandem seating and stub wing fuel tanks.
Powered by Lycoming TVO-435 engine rated at 270 hp (200 kW) for 5 minutes.
Texas Helicopter M79T Jet Wasp II – Texas Helicopter Corporation conversion of Bell 47G helicopters for agricultural use, powered by 420 hp (310 kW) Soloy-Allison 250-C20S engines.
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