Enstrom F-28
| Enstrom F-28 | |
|---|---|
|
|
| Type: | Micro helicopter |
| Design country: | |
| Manufacturer: | |
| First flight: |
November 12, 1960 |
| Commissioning: |
April 15, 1965 |
| Production time: |
since 1965 |
| Number of pieces: |
> 1000 |
The Enstrom F-28 is a helicopter from the US company Enstrom Helicopter Corporation that is powered by a piston engine.
history
The Enstrom F-28 was designed by Rudolph J. Enstrom , had its maiden flight on November 12, 1960 and was approved by the FAA on April 15, 1965 . The types 280FX and F28F produced by Enstrom are, according to their own statements, the only helicopters in which piston engines with turbochargers are used. For the standard equipment of the Enstrom F-28, the new price in 1966 was about 32,750 USD and in 2009 about 400,000 USD, for the Enstrom 280 in 1975 about 63,000 USD and in 2009 about 400,000 USD.
construction
As with all Enstrom helicopters, the swashplate is not visible from the outside under the main gearbox; the rotor blades are controlled by push rods through the hollow rotor mast. The fully articulated three-bladed main rotor is made of all-metal, a 2-bladed tail rotor serves as torque compensation . The aircraft engine is an air-cooled Lycoming O-360 four- cylinder boxer engine with turbocharger that delivers 225 SHP . The cabin of the Enstrom F-28 and 280FX offers space for two to three occupants as well as the pilot, the seat configuration can be individually adjusted. The landing gear is equipped with four OLEO - shock absorbers fitted.
The difference between the F-28 and 280 FX is that the F-28 has the larger cabin and the 280 FX is more aerodynamic and therefore slightly faster. Otherwise, both models have identical performance.
Versions
F-28
- F-28
- Admitted April 15, 1965; Drive: Lycoming HIO-360-C1A or HIO-360-C1B
- F-28A
- First mass-produced model, registered on May 28, 1968; Drive: Lycoming HIO-360-C1A or HIO-360-C1B
280
- 280
- Admitted September 13, 1974; Drive: Lycoming HIO-360-C1A or HIO-360-C1B
- 280C "Shark"
- Admitted December 8, 1975; Drive: Lycoming HIO-360-E1AD or HIO-360-E1BD with turbocharger
- 280C "Shark"
- Registered on September 23, 1977, version with increased take-off weight.
TH-28
Military variant of the Enstrom 280DFX, see Enstrom 480 .
Spitfire Mk.I
From the Spitfire Helicopter Company in Media in the US state of Pennsylvania an Enstrom F-28A (was in the 1970s N 4890) with a 420-SHP Allison 250 -C20B shaft turbine provided and as a Spitfire Mark I offered.
Technical specifications
| Enstrom F-28F / 280FX | Manufacturer information at ISA |
| Parameter | Data ( metric ) |
|---|---|
| crew | up to 2 passengers and 1 pilot |
| Hull length | 8.56 m |
| Main rotor diameter | 9.76 m |
| Tail rotor diameter | 1.42 m |
| height | 2.7 m |
| Empty mass | 744 kg |
| External payload | |
| Takeoff mass | 1179 kg |
| drive | 1 × Lycoming piston engine |
| fuel | 151 liters (from 92 to 100 octane ) |
| Starting power | 167 kW |
| Rate of climb | 7.4 m / s |
| HIGE | 2347 m |
| HOGE | |
| Service ceiling | 2743 m |
| Cruising speed | 75 knots (kn) |
| Top speed | 74 kn |
| Range |
Comparable helicopter types
- Bell 47 (no longer in production)
- Brantly B-2
- Robinson R22
- RotorWay Exec (Similar Size Kit Helicopter )
- Swiss 300C
Web links
- Manufacturer's homepage
- Manufacturer of the Spitfire helicopter
- Approval of the Enstrom-F-28/280 models on the FAA homepage (PDF; 142 kB)
literature
- Karlheinz Kens: Aircraft types , 4th edition, Carl Lange Verlag, Duisburg, 1963
- Apostolo, Giorgio: The Illustrated Encyclopedia of Helicopters , New York, Bonanza, 1984
- William Green: The Observer's World Aircraft Directory , Frederich Warne & Co., 1961