Rostec Presents Import-Substituted Hydraulic Leg Prosthesis

The Sputnik knee module operates without electronics

In spring 2026, serial production will begin for the new-generation domestic hydraulic knee module "Sputnik." Developed by the Moscow enterprise MPO "MetaLlist," it is intended to replace imported counterparts and provide prosthesis users with broad opportunities for an active life, including fitness, swimming, and cycling.

The new "Sputnik" knee module

The module operates on a hydraulic system without electronic components, which ensures smooth movement, controlled resistance during flexion, and stability when walking on stairs and uneven terrain.

A distinctive feature of the module — is moisture resistance, allowing the prosthesis to be used in any weather and even in water. The design also includes a removable protective pad in the kneecap area, which can be changed depending on the level of stress, minimizing the risk of damage from impacts. Users can personalize the appearance of the prosthesis by choosing the color of the cosmetic shell.

The developers emphasize that "Sputnik" is as close as possible in functionality to expensive microprocessor-based counterparts, while being significantly cheaper, more reliable, and not requiring recharging. The module has successfully passed testing by testers in everyday conditions and on special tracks.

Serial production is planned to begin in March 2026, and by the end of the year the first batch of 500 modules will be produced, MPO "MetaLlist" reported.

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