The bureau was also attracted by the possible advantages of lateral inlets, which would leave the nose free for search radar, and developed the T-49 prototype with such a forward fuselage. This confirmed the practicality of the concept, and further evolution produced the P-1 prototype.
Based on the Su-11, the T-49 experimented an alternative radar/intake arrangement. The radar was protruded forward, while the air intakes were placed at each sides of the radome. Maiden flight on 10 January 1960, tests soon stopped following a non-fatal accident.