Similar to the F-28C-2, the 3-place helicopter was certificated in December 1980.  There is a police version known as the F-28F-P Sentinel, with identical specifications and performance; it may be fitted with a searchlight, police radio, Forward Looking Infrared (FLIR) and PA systems.


Data on design, manufacture and status

Design authority: Enstrom Helicopter Corp.

Primary manufacturer: Enstrom Helicopter Corp.

Parent type: No type defined

Aircraft status: Operational


Primary flight and mechanical characteristics

VTOL type: Helicopter

Lift configuration: Single main rotor

Dedicated control device: Tail rotor

Crew required: TBA

Crew seating: Side-by-side

Landing gear: Skids

Layout and Dimensions

Data on aircraft size

Overall Dimensions
Overall Height: 2.70 m 8.9 ft
Overall Length: 8.56 m 28.1 ft
Overall Width: 9.75 m 32.0 ft
Airframe Dimensions
Airframe Length: 8.56 m 28.1 ft
Airframe Width: 2.20 m 7.2 ft
Airframe Height: 1.87 m 6.1 ft
Landing Gear Dimensions
Landing Gear Base: 2.44 m 8.0 ft
Landing Gear Track: 2.22 m 7.3 ft
Cabin Dimensions
Cabin Internal Height:  
Cabin Internal Length:  
Cabin Internal Width: 1.55 m 5.1 ft

Weights and Performance

Data on aircraft weight and flight characteristics

Max Gross Weight (ground): 1,179 kg 2,599 lb
Max Gross Weight (airborne):  
Max Take-off Weight: 1,179 kg 2,599 lb
Empty Weight: 712 kg 1,570 lb
Useful Load: 467 kg 1,029 lb
Empty Weight Fraction: 0.604
Climb Performance
Max Rate of Climb: 7 m/s 1,457 fpm
Hover Performance
Hover Ceiling IGE: 2,347 m 7,700 ft
Hover Ceiling OGE: 2,652 m 8,701 ft
Max Level Flight Speed: 164 km/h 89 kts
Never Exceed Speed: 180 km/h 97 kts
Service Ceiling: 3,658 m 12,001 ft
Range and Endurance
Max Range: 446 km 241 nm
Max Endurance: 4 hrs 4 hrs

Engine Details

Aircraft powerplant (lift and/or propulsion)

Provided powerplant data is for uninstalled, sea level, static operations.

Number of engines: 1
Designation: Lycoming HIO-360-FIAD reciprocating
Manufacturer: Lycoming Engines
Normal Ratings
Max continuous: 167 kW 224 hp
Take-off / rated:  
OEI Ratings
OEI contingency:  
OEI continuous:  
OEI 30-second:  
OEI intermediate:  

Primary Lift Device

Data on primary lift devices such as main rotors

Main Rotor Characteristics
Diameter: 9.75 m 31.99 ft
RPM: 351.0 rpm 351.0 rpm
Direction of Rotation: Counterclockwise
Hub Type: Fully articulated
Main Rotor Blade Characteristics
Blade Construction:
Blade Chord: 0.241 m 0.79 ft
Blade Tip Geometry: Flat
Blade Twist:  
Number of Blades: 3
Main Rotor Derived Characteristics
Disc Area: 74.66 m² 803.7 ft²
Disc Loading: 15.79 kg/m² 3.234 lb/ft²
Solidity: 0.0473
Main Rotor Blade Derived Characteristics
Blade area per blade: 1.18 m² 12.7 ft²
Tip Speed: 179.19 m/s 587.9 fps

Primary Control Device

Data on primary control devices such as tail rotors

Tail Rotor Characteristics
Diameter: 1.42 m 4.66 ft
Configuration: Unblocked
Direction of Rotation: Top blade fwd
Tail Rotor Blade Characteristics
Number of Blades: 2
Blade Construction:  
Blade Chord: 0.112 m 0.37 ft
Blade Twist:  
Tail Rotor Derived Characteristics
Disc Area: 1.58 m² 17.0 ft²
Solidity: 0.1002
Tail Rotor Blade Derived Characteristics
Tip Speed:  
Blade Area (per blade): 0.079 m² 0.85 ft²

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