Avia BH-26

1st Flight 1927

The Avia BH-26 was a two-seat armed reconnaissance aircraft built in Czechoslovakia in 1927.

It was a single-bay unstaggered biplane with equal-span wings and a fixed tailskid undercarriage.

Both upper and lower wings featured long-span ailerons, which were dynamically balanced by a small auxiliary airfoil mounted to the upper surface of the lower ailerons.

Its design was typical of this type of aircraft built during World War I and the years following; pilot and observer sat in tandem open cockpits with the observer armed with a machine gun on a ring mount.

As with many other Avia designs, the BH-26 originally had no fixed fin, only a rudder, but this was changed in service.

Specifications

Crew: 2 – pilot and observer

Length: 8.93 m (29 ft 4 in)

Wingspan: 10.8 m (35 ft 5 in)

Height: 3.35 m (11 ft 0 in)

Wing area: 31 m2 (330 sq ft)

Empty weight: 1,080 kg (2,381 lb)

Gross weight: 1,760 kg (3,880 lb)

Fuel capacity: 380 kg (840 lb) fuel and oil

Power plant: 1 × Walter-built Bristol Jupiter 9-cylinder air-cooled radial piston engine, 340 kW (450 hp)

Propellers: 2-bladed fixed-pitch propeller

Performance

Maximum speed: 250 km/h (160 mph, 130 kn)

Stall speed: 90 km/h (56 mph, 49 kn)

Range: 530 km (330 mi, 290 nmi)

Service ceiling: 7,500 m (24,600 ft)

Rate of climb: 6.3 m/s (1,240 ft/min)

Time to altitude: 5,000 m (16,000 ft) in 13 minutes 20 seconds; 6,000 m (20,000 ft) in 17 minutes 30 seconds; 7,000 m (23,000 ft) in 27 minutes

Wing loading: 55.6 kg/m2 (11.4 lb/sq ft)

Power/mass: 0.205 kW/kg (0.125 hp/lb)

Armament

Guns: 2x fixed, forward-firing, synchronized 7.7 mm Vickers machine-guns in the forward fuselage upper decking and 2x 7.7 mm Lewis guns on a flexible mount in the rear cockpit.

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