Percival Q6 Petrel

              1st Flight 1937

The Percival Q.6 was a 1930s British communications aircraft.

Originally, the Percival Q.6 was a civil transport.

Militarily the Q.6 was used during the Second World War by the Royal Air Force and Royal Navy as a communications and liaison aircraft.

It was a twin-engine, low-wing monoplane with a tail wheel undercarriage.

Variants

Q.4

Four-seat civil executive transport, none built.

Q.6

Six-seat civil feederliner.

Q.6 Mk I

Prototype fitted with wings intended for the Q.4 variant, one built.

Q.6 Mk II

Production variant with fixed landing gear, 12 built.

Q.6 Mk III

Variant with retractable landing gear. four built and one conversion from Mk II.

Q.6 Mk IV

Proposed air survey variant, not built.

Q.6 Mk V Petrel

Variant for military communications, this had four passenger seats and also a rear toilet was installed, nine-built.

Specifications

Crew: 2

Capacity

4-6 passengers

Length

32 ft 3 in (9.83 m)

Wingspan

46 ft 8 in (14.22 m)

Height

9 ft 9 in (2.97 m)

Wing area

278 sq ft (25.8 m2)

Empty weight

3,500 lb (1,588 kg)

Gross weight

5,500 lb (2,495 kg)

Powerplant

2 × de Havilland Gipsy Six II 6-cylinder air-cooled inverted inline piston engines, 205 hp (153 kW) each

Propellers

de Havilland Propellers controllable-pitch propellers

Performance

Maximum speed

195 mph (314 km/h, 169 kn) at sea level

Cruise speed

181 mph (291 km/h, 157 kn) at 7,000 ft (2,134 m) with retractable undercarriage

172 mph (149 kn; 277 km/h) at 7,000 ft (2,134 m) with fixed undercarriage

Landing speed

58 mph (50 kn; 93 km/h) with flaps extended

Range

700–750 mi (1,130–1,210 km, 610–650 nmi)

Endurance

4 hours at cruise

Service ceiling

21,000 ft (6,400 m)

Rate of climb

1,150 ft/min (5.8 m/s)

Maximum ceiling on one engine

6,500 ft (1,981 m)

Wing loading

19.8 lb/sq ft (97 kg/m2)

Power/mass

0.0746 hp/lb (0.1226 kW/kg).

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