Sikorsky S-67 Blackhawk
The aircraft was designed as a low-cost tactical helicopter demonstrator, based around the rotors, engines, hydraulic/electrical systems, and drive train of the S-61/H-3 series aircraft. It was a "semi-compund" design in that it was equipped with a lifting wing to off-load the rotor in high speed flight, but did not feature any auxiliary propulsion systems.
The main wheels were fully retractable but the tail wheel was fixed.
Overview
Data on design, manufacture and statusDesign authority: Sikorsky Aircraft Division, United Aircraft and Transport Corporation
Primary manufacturer: Sikorsky Aircraft Division, United Aircraft and Transport Corporation
Parent type: No type defined
Aircraft status: No longer flying
Configuration
Primary flight and mechanical characteristicsVTOL type: Helicopter
Compound type: Lift
Lift configuration: Single main rotor
Dedicated control device: Tail rotor
Crew required: 2
Crew seating: Tandem
Landing gear: Wheels (some retractable)
Layout and Dimensions
Data on aircraft sizeThe S-67 was intended to field a thermally- and acoustically-insulated troop compartment for six troops, with access provided through a door on the left side of the fuselage.
| Overall Dimensions | ||
|---|---|---|
| Overall Height: | 4.95 m | 16.3 ft |
| Overall Length: | 22.58 m | 74.1 ft |
| Overall Width: | 18.90 m | 62.0 ft |
| Airframe Dimensions | ||
|---|---|---|
| Airframe Length: | 19.74 m | 64.8 ft |
| Airframe Width: | 8.33 m | 27.3 ft |
| Airframe Height: | 4.57 m | 15.0 ft |
| Landing Gear Dimensions | ||
|---|---|---|
| Landing Gear Base: | 11.02 m | 36.2 ft |
| Landing Gear Track: | 2.13 m | 7.0 ft |
| Cabin Dimensions | ||
|---|---|---|
| Cabin Internal Height: | ||
| Cabin Internal Length: | ||
| Cabin Internal Width: | ||
Weights and Performance
Data on aircraft weight and flight characteristics| Weights | ||
|---|---|---|
| Max Gross Weight (ground): | 9,979 kg | 22,000 lb |
| Max Gross Weight (airborne): | ||
| Max Take-off Weight: | 9,979 kg | 22,000 lb |
| Empty Weight: | 5,681 kg | 12,525 lb |
| Useful Load: | 4,298 kg | 9,475 lb |
| Empty Weight Fraction: | 0.569 | |
| Climb Performance | ||
|---|---|---|
| Max Rate of Climb: | 10 m/s | 2,000 fpm |
| Hover Performance | ||
|---|---|---|
| Hover Ceiling IGE: | 2,957 m | 9,700 ft |
| Hover Ceiling OGE: | 1,981 m | 6,500 ft |
| Limitations | ||
|---|---|---|
| Max Level Flight Speed: | 324 km/h | 175 kts |
| Never Exceed Speed: | 370 km/h | 200 kts |
| Service Ceiling: | 5,180 m | 16,995 ft |
| Range and Endurance | ||
|---|---|---|
| Max Range: | 522 km | 282 nm |
| Max Endurance: | ||
Engine Details
Aircraft powerplant (lift and/or propulsion)Provided powerplant data is for uninstalled, sea level, static operations.
| Powerplant | ||
|---|---|---|
| Number of engines: | 2 | |
| Designation: | GE T58-GE-5 turbine | |
| Manufacturer: | General Electric Company | |
| Normal Ratings | ||
|---|---|---|
| Max continuous: | 933 kW | 1250 hp |
| Take-off / rated: | 1119 kW | 1500 hp |
| Intermediate: | 1044 kW | 1400 hp |
| Maximum: | ||
| OEI Ratings | ||
|---|---|---|
| OEI contingency: | ||
| OEI continuous: | ||
| OEI 30-second: | ||
| OEI intermediate: | ||
Primary Lift Device
Data on primary lift devices such as main rotorsSH-3D main rotor head
| Main Rotor Characteristics | ||
|---|---|---|
| Diameter: | 18.90 m | 62.00 ft |
| RPM: | 195.9 rpm | 195.9 rpm |
| Direction of Rotation: | Counterclockwise | |
| Hub Type: | Fully articulated in flap and lag | |
| Main Rotor Blade Characteristics | ||
|---|---|---|
| Blade Construction: | ||
| Blade Chord: | 0.464 m | 1.52 ft |
| Blade Tip Geometry: | 20 degrees swept | |
| Blade Twist: | -0.070 rad | -4.000 deg |
| Number of Blades: | 5 | |
| Main Rotor Derived Characteristics | ||
|---|---|---|
| Disc Area: | 280.48 m² | 3019.2 ft² |
| Disc Loading: | 35.58 kg/m² | 7.287 lb/ft² |
| Solidity: | 0.0781 | |
| Main Rotor Blade Derived Characteristics | ||
|---|---|---|
| Blade area per blade: | 4.38 m² | 47.1 ft² |
| Tip Speed: | 193.85 m/s | 636.0 fps |
Primary Control Device
Data on primary control devices such as tail rotorsSH-3D tail rotor hub. NACA 0012 tail blade airfoil section.
| Tail Rotor Characteristics | ||
|---|---|---|
| Diameter: | 3.51 m | 11.52 ft |
| Configuration: | Pusher | |
| Direction of Rotation: | Unknown | |
| RPM: | ||
| Tail Rotor Blade Characteristics | ||
|---|---|---|
| Number of Blades: | 5 | |
| Blade Construction: | ||
| Blade Chord: | 0.186 m | 0.61 ft |
| Blade Twist: | 0.00 rad | 0.0 deg |
| Tail Rotor Derived Characteristics | ||
|---|---|---|
| Disc Area: | 9.68 m² | 104.2 ft² |
| Solidity: | 0.1690 | |
| Tail Rotor Blade Derived Characteristics | ||
|---|---|---|
| Tip Speed: | ||
| Blade Area (per blade): | 0.327 m² | 3.52 ft² |
