The TL-III Tuuli was a primary trainer for the Finnish Air Force.
The wing is a light alloy stressed-skin structure. With a main spar at 25% chord. The slotted ailerons are light-alloyed covered. Aerodynamically and mass balanced, and fitted with balance tabs adjustable on ground. The landing flaps open 40 degrees, and the ailerons are coupled to the landing flaps so when the flaps fully open the ailerons are deflected 15 degrees.
The fuselage is a light-metal stressed-skin construction. Two main frames, one at the instrument panel and one behind the cargo compartment, divide the fuselage into three separately manufactured parts, which are riveted together. The extension of the main spar passes under the front seats in the fuselage, to which the fastening points of the main spar of the wings are attached. The fastening point of the auxiliary spar connects with a reinforced fuselage rib. The rudder and the elevators are stressed-skin structures with light-alloy covering.
The fin and stabiliser are attached to the reinforced ribs on the rear fuselage. Landing gear is rtractable mains and fixed tailwheel. The front cockpit has side-by-side pilot seats with full dual controls.
It was available in three versions; an aerobatic two-seater, a three-seat utility aircraft, and a for-seat liaison aircraft. It is capable of fitting a standard size stretcher.
Engine: Continental O-470-A, 225 hp
Span: 36 ft 1 in
Length: 26 ft 3 in
Height: 8 ft 6 in
Empty weight: 2350 lb
Loaded weight: 3166 lb
Max speed SL: 136 mph
Cruise: 112 mph
All Aero 