(Enstrom) F-28 & 280 @·AIRCRAFTUBE

  • Enstrom F28A Enstrom F28A
    Enstrom F28A
  • Enstrom F-28C Enstrom F-28C
    Enstrom F-28C
  • Enstrom F28FC Enstrom F28FC
    Enstrom F28FC
  • Enstrom 280FX Shark Enstrom 280FX Shark
    Enstrom 280FX Shark

Enstrom F-28

The Enstrom F-28 and 280 are a family of small, light piston-engined helicopters produced by the Enstrom Helicopter Corporation.

Design and development

Since delivering their first helicopter shortly after Federal Aviation Administration type certification of the F-28 model in April 1965, Enstrom helicopter has produced (as of 2007) approx 1,200 aircraft.

The company produces three models, the F-28, the more aerodynamic 280 and the turbine-engined 480, each with their own variants. The F-28 and 280 both use Lycoming piston engines virtually identical to those found in general aviation fixed-wing aircraft.

The 280 was a huge design success, with a Boston-based design firm concluding a brief to make the F28 more commercially appealing. This resulted in the 280 later being named by Fortune (magazine) as one of the 25 best factory-made products in the United States.

Design Features

The F-28 is a conventional light helicopter with skid landing gear and tubular metal tail rotor protector; horizontal stabiliser with fins at tips. High inertia, three-blade fully articulated rotor head with blades attached by retention pin and drag link; control rods pass inside tubular rotor shaft to swashplate inside fuselage; no rotor brake: blade section MAC A 0013.5; blades do not fold; two-blade teetering tail rotor. Thirty-groove belt drive from horizontally mounted engine to transmission.

Structure : Bonded light alloy blades. Fuselage has glass fibre and light alloy cabin section, steel tube centre-section frame, and stressed skin aluminium tailboom.

Controls : Conventional and manual. Trim system absorbs feedback from rotor and repositions stick datum as required by pilot.

Landing gear : Skids carried on Enstrom oleo-pneumatic shock-absorbers. Air Cruiser inflatable floats available optionally.

Power Plant : One 168kW Textron Lycoming HTO-360-F1AD fiat-four engine with Rotomaster 3BT5EE10J2 turbocharger. Two fuel tanks, each of 79.5 litres. Total standard fuel capacity 159 litres, of which 151 litres are usable. Auxiliary tank, capacity 49 litres, can be installed in the baggage compartment. Oil capacity 9.5 litres.

Accomodation : Pilot and two passengers, side by side on bench seat; centre place removable. Removable door on each side of cabin. Baggage space aft of engine compartment, with external door. Cabin heated and ventilated.

Systems : Electrical power provided by 24V 70A engine-driven alternator; 12V 70A system optional. No hydraulic system.

Avionics : Variety of fits from Honeywell and other avionics suppliers. Instrumentation: Standard equipment includes airspeed indicator, sensitive altimeter, compass, outside air temperature gauge, turn and bank indicator, rotor/engine tachometer, manifold pressure/fuel flow gauge, EGT gauge, oil pressure gauge, gearbox and oil temperature gauge, ammeter, cylinder head temperature gauge, and fuel quantity gauge. Eight-light annunciator panel consisting of low rotor rpm, chip detectors (main and tail rotor transmissions), overboost, clutch not fully engaged, low fuel pressure, starter and low-voltage warning lights.

Equipment : Shoulder harnesses for three seats. Night lighting is optional for F28F and standard on 280FX. Night lighting includes instrument lighting with dimmer control, position light on each horizontal stabiliser tip, anti-collision light and nose-mounted landing light. Optional equipment for both F28F and 280FX includes fixed float kit, wet or dry agricultural spray kit and cargo hook for utility missions. Wide instrument panel available for IFR training.

Variants

F-28

  • F-28 : Certified April 1965.
  • F-28A : Initial production version. Certified May 1968.
  • T-28 : Turbine powered.
  • F-28B : Turbocharged version.
  • F-28C : Fitted with an upgraded engine with turbocharger, and a two piece windscreen. Certified 1975
  • F-28C-2 : Fitted with a more rounded cabin, a single piece windsrceen and new console.
  • F-28F Falcon : Similar to F-28C with more powerful engine, improved turbocharger and addition of a throttle corellator. Certified December 1980
  • F-27F-P : Police patrol version developed for the Pasadena Police Department. It is equipped with searchlights, FLIR and a PA system.

280

  • 280 Shark : Certified September 1975.
  • 280C Shark : Aerodynamically refined version of the F28C-2, equipped with an upgraded engine, fitted with a turbocharger. Certified 1975
  • 280L Hawk : Stretched cabin four-seat version, first flying in December 1968. Development halted due to lack of funds.
  • 280F : Similar to 280C with more powerful engine, improved turbocharger and addition of a throttle correlator. Certified December 1980
  • 280FX : Based on the 280F with landing gear fairings, redesigned air intakes on top of the cabin and a redesigned a relocated horizontal stabilizer with vertical end plates. Certified in January 1985.

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This text is available under the Creative Commons Attribution-ShareAlike License
Source : Article Enstrom F-28 of Wikipedia ( authors )

Specifications (F28F)

  • Crew : One.
  • Capacity : Two passengers.
  • Length : 29 ft 3 in (8.91 m).
  • Rotor diameter : 32 ft (9.75 m).
  • Height : 9 ft (2.74 m).
  • Disc area : 804 ft² (74.7 m²).
  • Empty weight : 1,570 lb (712 kg).
  • Loaded weight : 2,600 lb (1,179 kg).
  • Useful load : 1,030 lb (467 kg).
  • Max. takeoff weight : 2,600 lb (1,179 kg).
  • Maximum speed : 97 knots (112 mph, 180 km/h) (max cruise).
  • Cruise speed : 89 knots (102mph, 164 km/h).
  • Range : 241 nm (277 mi, 446 km).
  • Service ceiling : 12,000 ft (3,660 m).
  • Rate of climb : 1,450 ft/min (7.37 m/s).
  • Powerplant : A Lycoming HIO-360-F1AD piston engine.
  • Power : 225 hp (168 kW).

— — — = = — — —

This text is available under the Creative Commons Attribution-ShareAlike License
Source : Article Enstrom F-28 of Wikipedia ( authors )
Enstrom F-28 & 280 : Your comments on this subject
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