[3] The reports of both pilots led to improvements incorporated in the next three pre-production prototypes,[2] termed TS-3 Ashvini, along with some alterations made to ease later production.
Alterations included revised forward fuselage contours and changes to control runs in the cockpit which allowed seats and sills to be lowered, easing access.
The lift to drag ratio was increased by lowering the wing relative to the fuselage, improving the aerodynamics of the junction.
[4] The Asvini had an all-wood structure, covered with a mixture of plywood and fabric, using Indian grown spruce and cedar.
[1][4] It had plain fabric covered ailerons and short DFS-type air-brake pairs placed behind the forward spar at about one quarter span.
[1][4] Pupil and instructor, provided with dual controls, sat in tandem ahead of the wing leading edge, the latter at the rear over the centre of gravity.