Names and dates
| Market original model designation | ИВ-4 | | Market model designation (english translation or spelling) | IV-4 | | Date of prototype completion | 1973 | | Country of manufacture | Russia |
People involved
| A. Gremyatski {А. Гремяцкий} | Constructor, Project leader | | V. Aleksandrov {В. Александров} | Constructor | | Alexander Boldyrev {Александр Болдырев} | Project initiator | | V. Monashev {В. Монашев} | Project leader |
Config info
| Rotorcraft type | Helicopter |
Weights
| Maximum Takeoff Weight (MTOW) | | | Manufacturers empty weight (MEW) | |
External dimensions
| Length | | | Width | | | Height | | | Landing gear type | Skids |
Main rotor
| Main rotor type | Semi-rigit | | Main rotor diameter | | | Main rotor direction of rotation | Clockwise | | Number of blades | 2 |
Tail rotor
| Tail rotor type | Classic tail rotor | | Tail rotor diameter | | | Tail rotor direction of rotation | Counterclockwise | | Number of blades | 2 |
Powerplant
| Engine model | Nelson H-63B | | Total maximum power | |
Performance
| Maximum horizontal flight speed (Vh) | | | Normal operation speed | | | Cruise speed (Vc) | | | Maximum service ceiling | | | Maximum flight endurance | |
|
