Credit
Staff Sgt. Cesar Rivas, Wyoming National Guard · Public domain · Resized · Public domain · Source ↗ · Modified
FORCETALLY
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Measured figures
F28F · Length
Single source29 ft 3 in (8.92 m)[source]
Configuration
| Specification | Boeing MH-139 Grey Wolf | Enstrom F-28 |
|---|---|---|
| Crew | — | one[source] |
| Type | Medium lift helicopter[source] | Light helicopter[source] |
| National origin | Italy/United States[source] | — |
| Manufacturer | Boeing Leonardo[source] | Enstrom Helicopter Corporation[source] |
| Status | In service, in production |
F28F · Main rotor diameter
Single source32 ft 0 in (9.75 m)[source]
F28F · Height
Single source9 ft 0 in (2.74 m)[source]
F28F · Range
Single source241 nmi (277 mi, 446 km)[source]
F28F · 1 × Lycoming HIO-360-F1AD four-cylinder, direct-drive, horizontally opposed, air-cooled, piston aircraft engine
Single source1 × Lycoming HIO-360-F1AD four-cylinder, direct-drive, horizontally opposed, air-cooled, piston aircraft engine, 225 hp (168 kW)[source]
F28F · Endurance
Single source3 hr 30 min[source]
F28F · Service ceiling
Single source12,000 ft (3,700 m)[source]
F28F · 1,450 ft/min (
Single source1,450 ft/min (7.4 m/s)[source]
Bars compare reported quantities only. A larger figure does not make a system better; configurations and test conditions differ.
| — |
| Primary user | United States Air Force[source] | — |
|---|
| Introduction date | 2020[source] | 1965[source] |
|---|
| First flight | 2019[source] | — |
|---|
| Developed from | AgustaWestland AW139[source] | — |
|---|
| Manufactured | — | 1965-present[source] |
|---|
| Variants | — | Enstrom TH180 Spitfire Mark I[source] |
|---|
| Developed into | — | Enstrom 480[source] |
|---|
| Capacity | — | two passengers[source] |
|---|
| Main rotor area | — | 804 sq ft (74.7 m 2 ) NACA 0013.5[source] |
|---|
| Country of origin | — | Vereinigte Staaten[source]Country of design · Entwurfsland |
|---|