Mil Mi-38 (Prototype OP-4)
OP-4 was the fourth protoype in the development program for the Russian Mi-38 medium multipurpose helicopter.
Data is based on the year 2017 data points of the fourth protoype and 2000 Russia's Helicopter World catalog data points of the Mi-38.
Configuration
Primary flight and mechanical characteristicsVTOL type: Helicopter
Lift configuration: Single main rotor
Dedicated control device: Tail rotor
Crew required: 1-3
Crew seating: Side-by-side
Landing gear: Wheels (non-retractable)
Layout and Dimensions
Data on aircraft size| Overall Dimensions | ||
|---|---|---|
| Overall Height: | ||
| Overall Length: | ||
| Overall Width: | 21.10 m | 69.2 ft |
| Airframe Dimensions | ||
|---|---|---|
| Airframe Length: | 19.95 m | 65.5 ft |
| Airframe Width: | 4.30 m | 14.1 ft |
| Airframe Height: | 6.15 m | 20.2 ft |
| Landing Gear Dimensions | ||
|---|---|---|
| Landing Gear Base: | ||
| Landing Gear Track: | ||
| Cabin Dimensions | ||
|---|---|---|
| Cabin Internal Height: | 1.84 m | 6.0 ft |
| Cabin Internal Length: | 7.00 m | 23.0 ft |
| Cabin Internal Width: | 1.84 m | 6.0 ft |
Weights and Performance
Data on aircraft weight and flight characteristicsCruise Speed: 285 km/h
| Weights | ||
|---|---|---|
| Max Gross Weight (ground): | 15,600 kg | 34,392 lb |
| Max Gross Weight (airborne): | ||
| Max Take-off Weight: | 15,600 kg | 34,392 lb |
| Empty Weight: | 8,300 kg | 18,298 lb |
| Useful Load: | 7,300 kg | 16,094 lb |
| Empty Weight Fraction: | 0.532 | |
| Climb Performance | ||
|---|---|---|
| Max Rate of Climb: | 9 m/s | 1,772 fpm |
| Hover Performance | ||
|---|---|---|
| Hover Ceiling IGE: | ||
| Hover Ceiling OGE: | 3,750 m | 12,303 ft |
| Limitations | ||
|---|---|---|
| Max Level Flight Speed: | 290 km/h | 157 kts |
| Never Exceed Speed: | ||
| Service Ceiling: | 5,900 m | 19,357 ft |
| Range and Endurance | ||
|---|---|---|
| Max Range: | ||
| Max Endurance: | ||
Engine Details
Aircraft powerplant (lift and/or propulsion)Provided powerplant data is for uninstalled, sea level, static operations.
| Powerplant | ||
|---|---|---|
| Number of engines: | 2 | |
| Designation: | Klimov TV7-117V turbine | |
| Manufacturer: | JSC Klimov United Engine Corporation | |
| Normal Ratings | ||
|---|---|---|
| Max continuous: | ||
| Take-off / rated: | 2088 kW | 2799 hp |
| Intermediate: | ||
| Maximum: | ||
| OEI Ratings | ||
|---|---|---|
| OEI contingency: | 2610 kW | 3499 hp |
| OEI continuous: | ||
| OEI 30-second: | 2796 kW | 3748 hp |
| OEI intermediate: | 2237 kW | 2999 hp |
Primary Lift Device
Data on primary lift devices such as main rotorsThe main rotor is fold-able for storage and transport.
| Main Rotor Characteristics | ||
|---|---|---|
| Diameter: | 21.10 m | 69.23 ft |
| RPM: | ||
| Direction of Rotation: | Counterclockwise | |
| Hub Type: | Elastomeric Bearing | |
| Main Rotor Blade Characteristics | ||
|---|---|---|
| Blade Construction: | Composite | |
| Blade Chord: | ||
| Blade Tip Geometry: | Swept | |
| Blade Twist: | ||
| Number of Blades: | 6 | |
| Main Rotor Derived Characteristics | ||
|---|---|---|
| Disc Area: | 349.67 m² | 3763.9 ft² |
| Disc Loading: | 44.61 kg/m² | 9.138 lb/ft² |
| Solidity: | ||
| Main Rotor Blade Derived Characteristics | ||
|---|---|---|
| Blade area per blade: | ||
| Tip Speed: | ||
Primary Control Device
Data on primary control devices such as tail rotorsTail rotor hubs are locaed to provide non-90 deg spacing between blades of each hub
| Tail Rotor Characteristics | ||
|---|---|---|
| Diameter: | ||
| Configuration: | Tractor | |
| Direction of Rotation: | Top blade aft | |
| RPM: | ||
| Tail Rotor Blade Characteristics | ||
|---|---|---|
| Number of Blades: | 4 | |
| Blade Construction: | Asymmetrical X-shape | |
| Blade Chord: | ||
| Blade Twist: | ||
| Tail Rotor Derived Characteristics | ||
|---|---|---|
| Disc Area: | ||
| Solidity: | ||
| Tail Rotor Blade Derived Characteristics | ||
|---|---|---|
| Tip Speed: | ||
| Blade Area (per blade): | ||
Related VFS Resources
Resources related to the Mi-38 (Prototype OP-4), provided by the Vertical Flight Society.Forum Proceedings
Vertiflite articles
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Web files from vtol.org
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Webpages from vtol.org
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Related Public Resources
Resources related to the Mi-38 (Prototype OP-4), provided by public sources across the internet.Publicly-funded resources provided by the US Government
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Public resources provided by select scholarly and academic sources
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