The Ikarus S-451M Zolja (“Wasp”) was an unarmed further development of the S-451M. This all metal aircraft was designed as a light attack aircraft. The letter M (Mlazni) means that the aircraft is powered by jet engines. It was a more streamlined design with a stretched fuselage, folding wings and two Palas turbojet engines installed within the wing rather than under them.
A single Zolja prototype was manufactured and made its first flight in 1954.
By 1960 the S-451M was now in civilian hands (registered as YU-COH) and on May 19th, 1960 broke the world air speed record in the I-C aircraft category, flown by pilot Ivan Črnjarić at 501 km/h (the record would remain unbeaten for 5 years).
The aircraft was retired in 1968 following damage from a ground incident.
Engines: 2 × Turbomeca Palas 056A
Length: 6.8 m (22 ft)
Wingspan: 6.70 m (21 ft 7 in)
Height: 2.3 m (7 ft 7 in)
Wing area: 8.00 m² (86 ft ²)
Loaded weight: 1202 kg (2644 lb)
Maximum speed: 439 km / h (284.5 mph)
Minimum speed: 153 km / h (94.8 mph)
Range: 392 km (233 miles)
Ceiling: 8550 m (28,045 ft)
Takeoff distance: 600 m
Landing distance: 582 m
All Aero 