HAL Revives Spin Testing for Next-Gen Intermediate Jet Trainer
Liaising with innovation, HAL’s indigenous Intermediate Jet Trainer (IJT) has officially kicked off spin flight testing in Bengaluru, aimed at replacing the aging Kiran aircraft fleet in the Indian Air Force (IAF). The initial flight was managed by seasoned HAL test pilots, Gp. Capt H.V. Thakur (Retd) and Wg. Cdr P. Avasti (Retd).
Spin testing represents a pivotal phase in aircraft flight trials. This rigorous process will progress methodically, evaluating the aircraft’s behavior through six-turn spins in both directions to ensure it meets the predetermined specifications.
The IJT has successfully achieved extensive testing across its operational parameters, including speed, altitude, and load factor (‘g’ envelope). It has been equipped with drop tanks and bomb integration. Significant modifications for the spin tests include a redesigned vertical tail moved further aft and an enlarged rudder surface. These adjustments necessitated comprehensive redesign work on the rear fuselage and rudder to guarantee optimal spin characteristics.
Two aircraft have received these enhancements, with active collaboration and clearance from certification agencies throughout the process. Following the modifications, these aircraft underwent substantial flight assessments to evaluate their handling with the newly configured fin and rudder system.
Safety remains a priority, as the aircraft are now outfitted with critical safety features, including Anti-Spin Parachute Systems. In the initial flight session, the aircraft was subjected to one-turn spins to both left and right, enabling thorough evaluation of its spin characteristics.
