The Sukhoi Su-37 (Russian: Сухой Су-37, NATO reporting name: Flanker-F) is an experimental single-seat, super-maneuverable multi-role jet fighter designed by Sukhoi. A further development of the original Su-27 "Flanker", it was modified from the first-generation Su-35 (formerly "T10M") prototypes. Despite demonstrating several tactical advantages, the Su-37 did not enter production, and instead remained as a technology demonstrator for updated Su-27 family aircraft such as the export Su-30 and the Su-35BM (of which it was developed from).