Credit
Original uploader was User:Ahunt at en:wikipedia · Public domain · Resized · Public domain · Source ↗ · Modified
FORCETALLY
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At a glance
Measured figures
F28F · Length
Single source29 ft 3 in (8.92 m)[source]
Mi-4A · Length
Single sourceConfiguration
| Specification | Enstrom F-28 | Mil Mi-4 |
|---|---|---|
| Crew | one[source] | 1 or 2[source] |
| Type | Light helicopter[source] | Transport helicopter[source] |
| Manufacturer | Enstrom Helicopter Corporation[source] | Mil Moscow Helicopter Plant[source] |
| Manufactured | 1965-present[source] | 1951–1979[source] |
16.8 m (55 ft 1 in)[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]
Mi-4A · 1 × Shvetsov ASh-82V 14-cylinder air-cooled radial piston engine
Single source1 × Shvetsov ASh-82V 14-cylinder air-cooled radial piston engine, 1,250 kW (1,680 hp)[source]
F28F · Endurance
Single source3 hr 30 min[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.
| Introduction date | 1965[source] | 1953[source] |
|---|
| Variants | Enstrom TH180 Spitfire Mark I[source] | — |
|---|
| Developed into | Enstrom 480[source] | — |
|---|
| Capacity | two passengers[source] | 16 troops or up to 1,600 kg (3,527 lb) of cargo[source] |
|---|
| Main rotor area | 804 sq ft (74.7 m 2 ) NACA 0013.5[source] | 346.4 m 2 (3,729 sq ft)[source] |
|---|
| Country of origin | Vereinigte Staaten[source]Country of design · Entwurfsland | Soviet Union[source] |
|---|
| Status | — | Limited Service; North Korean Air Force[source] |
|---|
| Primary users | — | Soviet Air Force Indian Air Force Polish Air Force Royal Afghan Air Force[source] |
|---|
| Number built | — | over 4,000 including Z-5s[source] |
|---|
| First flight | — | 3 June 1952[source] |
|---|
| Variant | — | Harbin Z-5[source] |
|---|
| Disk loading | — | 41 kg/m 2 (8.4 lb/sq ft)[source] |
|---|
| Power/mass | — | 0.21 kW/kg (0.13 hp/lb)[source] |
|---|
| National origin | — | Soviet Union[source] |
|---|
Maximum take-off; Mi-4A · Max takeoff weight
Single source