Credit
Original uploader was User:Ahunt at en:wikipedia · Public domain · Resized · Public domain · Source ↗ · Modified
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At a glance
Measured figures
F28F · Length
Single source29 ft 3 in (8.92 m)[source]
K-MAX · rotors running
Single sourceConfiguration
| Specification | Enstrom F-28 | Kaman K-MAX |
|---|---|---|
| Type | Light helicopter[source] | Medium lift helicopter[source] |
| Manufacturer | Enstrom Helicopter Corporation[source] | Kaman Aircraft[source] |
| Manufactured | 1965-present[source] | 1991–2003, 2015–2023[source] |
| Introduction date | 1965[source] | — |
| Variants |
52 ft (16 m) rotors running[source]
K-MAX · with rotors running
Single source51 ft 5 in (15.67 m) with rotors running[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]
K-MAX · 1 × Honeywell T5317A-1 turboshaft engine, 1,350 shp ( ) flat rated for take-off up to ~29,000 ft (8,839 m) to increase transmission life
Single source1 × Honeywell T5317A-1 turboshaft engine, 1,350 shp (1,010 kW) flat rated for take-off up to ~29,000 ft (8,839 m) to increase transmission life[source]
F28F · Endurance
Single source3 hr 30 min[source]
Bars compare reported quantities only. A larger figure does not make a system better; configurations and test conditions differ.
Enstrom TH180 Spitfire Mark I[source] |
| — |
| Developed into | Enstrom 480[source] | — |
|---|
| Capacity | two passengers[source] | 6,000 lb (2,722 kg) external load at ISA +15 °C (59.0 °F) at sea level 5,663 lb (2,569 kg) external load at ISA +15 °C (59.0 °F) at 5,000 ft (1,524 m) 5,163 lb (2,342 kg) external load at ISA +15 °C (59.0 °F) at 10,000 ft (3,048 m) 5,013 lb (2,274 kg) external load at ISA +15 °C (59.0 °F) at 12,100 ft (3,688 m) 4,313 lb (1,956 kg) external load at ISA +15 °C (59.0 °F) at 15,000 ft (4,572 m)[source] |
|---|
| Main rotor area | 804 sq ft (74.7 m 2 ) NACA 0013.5[source] | 3,669 sq ft (340.9 m 2 )[source] |
|---|
| Country of origin | Vereinigte Staaten[source]Country of design · Entwurfsland | — |
|---|
| Status | — | Production ended, in service[source] |
|---|
| First flight | — | December 23, 1991[source] |
|---|
| Fuel capacity | — | 1,541 lb (699 kg) / 228.5 US gal (190 imp gal; 865 L)[source] |
|---|
| Length of fuselage | — | 41 ft 9 in (12.73 m)[source] |
|---|
| Blade section | — | - root: NACA 23012 ; tip: NACA 23011[source] |
|---|
| Never exceed speed | — | 100 kn (120 mph, 190 km/h) clean[source] |
|---|
| Hover ceiling IGE | — | 26,300 ft (8,016 m) at 6,000 lb (2,722 kg) AUW, ISA[source] |
|---|
| Disk loading | — | 3.52 lb/sq ft (17.2 kg/m 2 )[source] |
|---|
| Power/mass | — | 0.1045 hp/lb (0.1718 kW/kg)[source] |
|---|
| Fuel consumption | — | 85 gal/h (71 imp gal/h; 322 L/h)[source] |
|---|