March 30, 2014 by Shiv Aroor - Livefist
The aircraft should be easy to fly and have good control response/agility. The flying qualities should preferably conform to Mil-F-8785C and Mil Std 1797-A. The aircraft should demonstrate the following qualities: (a) Stalling. An unmistakable natural stall warning should be available, irrespective of the configuration. (b) Spinning. The aircraft must be resistant to spin but it should be possible to perform intentional spin upto six turns to either side and recover safely thereafter. The aircraft behavior in the spin should be predictable and consistent. (c) Aerobatics The IJT should be capable of performing loops, barrel rolls, rolls, combination maneuvers and negative ‘g’ flight without adverse effects on the engine and aircraft structure. The aircraft should be capable of sustained inverted flight for at least 30 seconds at sea level at maximum takeoff power.
Interestingly, the IAF has also specified a 'counter-insurgency' role for the platform it's looking for. In 2011, HAL began the process to kit out the HJT-36 with armament. For its freshly stated requirement, it has specified the following:
The aircraft should be capable of carrying at least 1000 kg of external load. The aircraft should be equipped with a minimum of five hard points and each hard point on the wing should be stressed to carry at least 300 kg stores. The aircraft should be, free from buffet, dutch roll, snaking and wing rock during air to ground weapon training. The aircraft should be capable of employing the following armament: (a) Gun. A light weight gun/ gun-pod with adequate ammunition for at least 5 sec of firing time. (b) Rocket Pods. Reusable rocket pods. (c) Bombs. Should be able to carry at least 4x250 kg retarded or ballistic bombs. The stations should be capable of employing Carrier Bomb Light Stores (CBLS) type of dispensers for carriage of practice bombs (25 lbs and 3 Kg).