AL31FP

The AL-31FP is a turbofan engine developed by the Lyulka-Saturn design bureau in Russia. It is a variant of the AL-31F engine, which powers the Sukhoi Su-27 family of fighter aircraft. The "FP" designation indicates that it is intended for naval aviation applications, specifically for carrier-based aircraft. The primary difference from the AL-31F lies in its modifications to withstand the unique stresses and environmental conditions of carrier operations.

These modifications typically include a more robust engine mount, improved resistance to salt corrosion, and potentially a different thrust vectoring system for enhanced maneuverability during carrier landings and takeoffs. The AL-31FP is designed to provide high thrust-to-weight ratio and reliable performance in demanding flight envelopes. It features a multi-stage compressor, a single-stage turbine, and afterburning capabilities.

The engine's development was closely linked to the requirement for a powerplant for the Sukhoi Su-33 (NATO reporting name: Flanker-D), a derivative of the Su-27 designed for naval deployment. The AL-31FP has been a crucial component in the operational capability of Russia's naval aviation. While specific technical details and performance figures are often proprietary, the engine is recognized for its power and durability in a challenging operational environment.