First flown on 21 May 1958 by Mieczysław Miłosz the PZL-102 was designed as a semi-aerobatic two-seat light monoplane and was later given the name Kos. The Kos was an all-metal low-wing cantilever monoplane with fabric tail control surfaces. It had a fixed tailwheel landing gear and the prototype had a nose-mounted 65 hp (48 kW) Narkiewicz WN-1 flat-four engine. The Kos had an enclosed cockpit for two side-by-side. After a number of prototypes the production aircraft (designated PZL-102B) first flew in October 1959, with Continental C90 engine and changed wing construction. Only short series was produced, because it needed imported engine.

Between 13 May and 8 June 1960 Antoni Szymański made 9000 km commercial flight on PZL-102B on route Warsaw - Vienna - Geneva - Reims - London - Luxembourg - Berlin - Warsaw.

Seven aircraft were sold abroad. Austrian aircraft were operated for agrospraying purposes. Tank filled with chemical agent was placed on the passenger seat.

One PZL-102 has been restored to airworthy condition (markings SP-EFA).

PZL-102A

Prototypes

PZL-102B

Production variant with Continental C90 engine.

There is another PZL 102B restored in South Africa, based at Jack Taylor Airfield Krugersdorp, and one more in Brazil (PT-BGP)

•   Austria
•   Brazil
•   Finland
•   Lebanon
•   Poland
•   South Africa

Data from Jane's All the World's Aircraft 1962-63,^[1] The Illustrated Encyclopedia of Aircraft^[2]

General characteristics

• Crew: 2
• Length: 6.97 m (22 ft 10 in)
• Wingspan: 8.49 m (27 ft 10 in)
• Height: 1.88 m (6 ft 2 in)
• Wing area: 11.02 m² (118.6 sq ft)
• Airfoil: NACA 43012A^[3]
• Empty weight: 418 kg (922 lb)
• Max takeoff weight: 630 kg (1,389 lb)
• Fuel capacity: 75 L (19.8 US gal; 16.5 imp gal)
• Powerplant: 1 × Continental C90-12F 4-cylinder air-cooled horizontally-opposed piston engine, 71 kW (95 hp)
• Propellers: 2-bladed fixed-pitch wooden propeller, 1.8 m (5 ft 11 in) diameter

Performance

• Maximum speed: 193 km/h (120 mph, 104 kn)
• Cruise speed: 174 km/h (108 mph, 94 kn)
• Stall speed: 69 km/h (43 mph, 37 kn) with flaps down
• Never exceed speed: 300 km/h (190 mph, 160 kn)
• Range: 640 km (400 mi, 350 nmi) at 135 km/h (84 mph; 73 kn)
• Service ceiling: 3,800 m (12,500 ft)
• Rate of climb: 3.5 m/s (690 ft/min)
• Wing loading: 57.2 kg/m² (11.7 lb/sq ft)
• Power/mass: 0.1126 kW/kg (0.0685 hp/lb)
  
• Take-off run: 460 m (1,510 ft)
• Take-off distance to 15 m (49 ft): 1,300 m (4,300 ft)
• Landing distance from 15 m (49 ft): 1,100 m (3,600 ft)

• Taylor, Michael J. H. (1989). Jane's Encyclopedia of Aviation. London: Studio Editions.

• Photographs