CNNA HL-6
# CNNA HL-6

The CNNA HL-6 was a civil trainer aircraft developed in Brazil in 1943.

## Development

The HL-6 was a low-wing cantilever monoplane of conventional configuration. It employed a fixed tailskid undercarriage. The student and instructor sat in tandem, in open cockpits.

## Variants

* HL-6 - prototype. One built
* HL-6A - similar to prototype but with more powerful engine. Five units were constructed in 1943.
* HL-6B Cauré - Similar to HL-6A but with more powerful engine 216 kW (290 hp) Lycoming O-290C, and optional enclosed cabin. 39 units were constructed in 1944.

## Specifications (HL-6B Cauré trainer)

Data from Jane's all the World's Aircraft 1947

General characteristics

* Crew: 2
* Length: 7.2 m (23 ft 7 in)
* Wingspan: 9.8 m (32 ft 2 in)
* Height: 2.04 m (6 ft 8 in)
* Wing area: 15 $m^2$ (160 sq ft)
* Empty weight: 545 kg (1,202 lb)
* Gross weight: 750 kg (1,653 lb)
* Fuel capacity: 88 L (23 US gal; 19 imp gal)
* Powerplant: 1 × Lycoming O-290-C 4-cylinder air-cooled horizontally-opposed piston engine, 97 kW (130 hp) at 2,800 rpm for take-off
* Propellers: 2-bladed wooden fixed-pitch propeller

Performance

* Maximum speed: 200 km/h (120 mph, 110 kn)
* Cruise speed: 180 km/h (110 mph, 97 kn) 70% power
* Stall speed: 85 km/h (53 mph, 46 kn)
* Range: 520 km (320 mi, 280 nmi) (radius 260 km (160 mi; 140 nmi))
* Service ceiling: 4,500 m (14,800 ft) service ceiling
* Rate of climb: 4.5 m/s (890 ft/min)
* Time to altitude: 1,000 m (3,300 ft) in 4.2 minutes
* Wing loading: 50 $kg/m^2$ (10 lb/sq ft)
* Power/mass: 8.046 kg/kW (13.23 lb/hp)
