Names and dates
| Market original model designation | АТМ-121 | | Market model designation (english translation or spelling) | ATM-121 | | Project unveiling date | | | Country of manufacture | Russia |
People involved
| Shamil Suleymanov {Шамиль Сулейманов} | Chief design engineer | | Sergei Astapenko {Сергей Астапенко} | Project leader | | Anatoly Mezhevov {Анатолий Межевов} | Function unknown |
Config info
| Rotorcraft type | Helicopter | | Config | Coaxial rotors |
Weights
| Maximum Takeoff Weight (MTOW) | | | Useful load | |
Cabin and cockpit
| Maximum number of passengers onboard | 4 | | Maximum number of people onboard | 5 |
External dimensions
| Fuselage length | | | Fuselage width | | | Landing gear width | |
Main rotor
| Number of blades (System no.: 1) | 3 | | Number of blades (System no.: 2) | 3 |
Powerplant
| Engine model | АНЗ-250ВК | | Engine model (english translation or spelling) | ANZ-250VK | | Engine type | Wankel | | Engine dry weight | | | Number of engines | 1 | | Total maximum power | |
Performance
| Maximum horizontal flight speed (Vh) | | | Maximum service ceiling | | | Hover ceiling OGE | | | Maximum range | | | Maximum flight endurance | |
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