Soviet Haaregrad wrote:Pa 13 Kometa
Introduced in 1941, the Pa 13 was the last design by Nestor Żurakowski before he left for the Shvetsov bureau. When the Kometa was designed it was envisioned as a specialized aircraft; its primary role was that of a high-speed, short range bomber interceptor. The Pa 13 was also designed to take advantage of the most advanced aerodynamics of the time and embodied structural techniques which were an advance on its contemporaries. It was to be a strictly local-defense interceptor, intended to counter the threat of high-altitude bomber raids, and thus relied on speed, climb performance, and armament at the expense of manoeuvrability. Rare for a CISR design, it made use of a liquid cooled engine.The Pa 13 was a sleek, but stubby craft with its over-sized V12 engine and chin-mounted radiator.
With it's effective two-stage turbo-supercharger the aircraft soon gained dominance in the daylight hours, forcing a switch to night time bombing. With an increase in use against fighters the Kometa's lack of agility started to reduce it's effectiveness. Improved versions, using high-lift devices were able to considerably enhance the handling qualities of the Pa 13. Since the fighter was being designed primarily for high-speed flight, a smaller wing area would be optimal for achieving high level speeds, but the downside of such a trade-off was that low-speed flight would suffer, as the smaller wing would require more airflow to generate enough lift to stay flying. To compensate for this, the Kometa included advanced high-lift devices on the wings, including automatically opening leading edge slats, and fairly large camber-changing flaps on the trailing edge. The slats increased the overall lift of the wing considerably when deployed, greatly improving the horizontal maneuverability of the aircraft.
Pa 13PD Kometa
Primary Function: Interceptor, Fighter
Contractor: Pavlov Design Bureau OKB
Power Plant: 1 358kW (1 820hp) Mikulin M-242M liquid-cooled inverted V12 engine
Length: 8.95 metres (29'7")
Height: 3.8 metres (13')
Wingspan: 10.20 metres (33'5")
Ceiling: 12 000 metres (39 400')
Speed: 710 km/h (440 mph)
Ferry Range: 1 000 km (620 mi)
Empty Weight: 2 840 kg (6 260lbs)
Maximum Takeoff Weight: 3 480kg (7 670lbs)
Armament: 2x 13.5mm autorevolver machine guns and 2x 25mm cannon, 2x 250kg bombs in fighter bomber role
Crew: 1
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