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.
VTOL 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)
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 |
Cruise 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: |
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 |
The 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: |
Tail 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): |