CNNA HL-6

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

HL-6
Role Civil trainer aircraft
Manufacturer CNNA
First flight October 1942
Number built 60

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.[1]

Variants
  • HL-6 - prototype. One built
  • HL-6A - similar to prototype but with more powerful engine. Five units were constructed in 1943.
  • HL-6B Carué - 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 Carué trainer)

Data from Jane's all the World's Aircraft 1947[2]

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 m2 (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/m2 (10 lb/sq ft)
  • Power/mass: 8.046 kg/kW (13.23 lb/hp)

References
  1. Taylor, Michael J. H. (1989). Jane's Encyclopedia of Aviation. London: Studio Editions. p. 256.
  2. Bridgman, Leonard, ed. (1947). Jane's all the World's Aircraft 1947. London: Sampson Low, Marston & Co. pp. 7c–8c.

Further reading
  • Bertazzo, Roberto Portella (2003). A Crise da Industria Aeronáutica Brasiliera 1945-1968. pp. 10–11.
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