Initial certification in Apr 1965.  The fuselage is composed of fiberglass and aluminum sheeting; the tail boom is enclosed in aluminum sheeting in a semi-monocoque structure [Ref 334].  The F-28A was FAA certified to be fitted with floatation gear in June 1969.  Under the New Jersey State Police, the helicopter was equipped with loudspeakers, a siren, and a 1600 watt Nite Sun Searchlight [Vertiflite, June 1969, page 28].  As another role, the helicopter may also be fitted for spraying operations.


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: 1

Crew seating: Side-by-side

Landing gear: Skids

Layout and Dimensions

Data on aircraft size

Overall Dimensions
Overall Height: 2.74 m 9.0 ft
Overall Length:  
Overall Width: 9.75 m 32.0 ft
Airframe Dimensions
Airframe Length: 8.53 m 28.0 ft
Airframe Width: 2.24 m 7.3 ft
Airframe Height: 2.77 m 9.1 ft
Landing Gear Dimensions
Landing Gear Base:  
Landing Gear Track: 2.21 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): 975 kg 2,150 lb
Max Gross Weight (airborne):  
Max Take-off Weight: 975 kg 2,150 lb
Empty Weight: 658 kg 1,450 lb
Useful Load: 318 kg 700 lb
Empty Weight Fraction: 0.674
Climb Performance
Max Rate of Climb: 5 m/s 950 fpm
Hover Performance
Hover Ceiling IGE:  
Hover Ceiling OGE:  
Max Level Flight Speed: 180 km/h 97 kts
Never Exceed Speed: 182 km/h 98 kts
Service Ceiling: 3,048 m 10,000 ft
Range and Endurance
Max Range: 504 km 272 nm
Max Endurance:  

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-C1A reciprocating
Manufacturer: Lycoming Engines
Normal Ratings
Max continuous:  
Take-off / rated: 153 kW 205 hp
OEI Ratings
OEI contingency:  
OEI continuous:  
OEI 30-second:  
OEI intermediate:  

Primary Lift Device

Data on primary lift devices such as main rotors

Each bladed weighs 51 lb.

Main Rotor Characteristics
Diameter: 9.75 m 32.00 ft
RPM: 330.0 rpm 330.0 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: Conventional
Blade Twist:  
Number of Blades: 3
Main Rotor Derived Characteristics
Disc Area: 74.72 m² 804.3 ft²
Disc Loading: 13.05 kg/m² 2.673 lb/ft²
Solidity: 0.0473
Main Rotor Blade Derived Characteristics
Blade area per blade: 1.18 m² 12.7 ft²
Tip Speed: 168.53 m/s 552.9 fps

Primary Control Device

Data on primary control devices such as tail rotors

Tail Rotor Characteristics
Diameter: 1.42 m 4.67 ft
Configuration: Unblocked
Direction of Rotation: Top blade fwd
RPM: 2365 rpm 2365 rpm
Tail Rotor Blade Characteristics
Number of Blades: 2
Blade Construction:  
Blade Chord: 0.086 m 0.28 ft
Blade Twist:  
Tail Rotor Derived Characteristics
Disc Area: 1.59 m² 17.1 ft²
Solidity: 0.0769
Tail Rotor Blade Derived Characteristics
Tip Speed: 176.15 m/s 577.9 fps
Blade Area (per blade): 0.061 m² 0.66 ft²

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