This is the more advanced version of the Avia Czechoslovakian fighter from the 30s, the Avia B-534-IV from 1935. The comparison between the two illustrations by John Weal is rather interesting. This was also out of the July, 1974 issue of Air International.
Tom West
Specifications (B-534 IV)
Data from Aircraft of the Third Reich Vol.1[20]
General characteristics
Crew: 1
Length: 8.2 m (26 ft 11 in)
Wingspan: 9.4 m (30 ft 10 in)
Height: 3.1 m (10 ft 2 in)
Wing area: 23.56 m2 (253.6 sq ft)
Empty weight: 1,460 kg (3,219 lb)
Gross weight: 1,985 kg (4,376 lb)
Max takeoff weight: 2,120 kg (4,674 lb)
Powerplant: 1 × Hispano-Suiza 12Ydrs liquid-cooled V12 engine, 634 kW (850 hp)
Performance
Maximum speed: 405 km/h (252 mph; 219 kn) at 4,400 m (14,436 ft)
Cruising speed: 345 km/h (214 mph; 186 kn)
Range: 580 km (360 mi; 313 nmi)
Service ceiling: 10,600 m (34,777 ft)
Rate of climb: 15.1 m/s (2,970 ft/min)
Time to altitude: 5,000 m (16,404 ft) in 4 minutes 28 seconds
Wing loading: 90.2 kg/m² (18.5 lb/sq ft)
Power/mass: 0.292 kW/kg (0.178 hp/lb)
Armament
Guns: 4× 7.92 mm (0.312 in) Mk 30 (Česká zbrojovka Strakonice) machine guns with 250-300 rpg
Bombs: 6× 10 kg (22 lb) or 4x 20 kg (44 lb) bombs
