SZD-50 Puchacz

SZD-50 Puchacz
Role Sailplane
National origin Poland
Manufacturer PZL Bielsko
Designer Adam Meus
First flight 13 April 1979




The PZL Bielsko SZD-50 Puchacz (Polish: "Eagle Owl") is a Polish two-place training and aerobatic sailplane.

Development

The Puchacz was designed by Dipl-Ing Adam Meus based on the prototype SZD-50-1 Dromader. It was intended to serve as the successor to the popular Bocian for training. Its first flight was April 13, 1979.

Being a moderately-priced, versatile, modern two-seater with good handling qualities on the ground and in the air, the Puchacz has become a very popular two-seater sailplane in many countries both for ab-initio and aerobatic instruction.

A number of fatal accidents involving spins have occurred with the Puchacz. Investigation have cleared the design in each case, but the type's reputation has nevertheless been tainted. Its supporters point out that it was designed to obey faithfully all control inputs - including foolish ones. Partial failures at the rudder bar and control sticks have been known to occur, but Airworthiness Directives have been issued for modifications.

Description

The Puchacz is a construction protected by polyurethane paint rather than the more usual gelcoat finish. Although it is mainly glassfibre, the fuselage has two wooden frames as the connection point for the wings and undercarriage. Assembly entails inserting a single main pin to secure the wings in place and a spring-loaded locking pin for the tailplane. The air brakes open above and below the wings and are extremely efficient in comparison with other gliders, allowing very steep flight.

It has a tandem seating arrangement for the two occupants with the front seat used for solo flights. The front rudder pedals and the rear seat shell are adjustable. The front instruments are arranged so that they can be easily viewed from the rear seat; a rear instruments panel is also available as an option.

The Puchacz meets both OSTIV and JAR-22 Utility Category certification requirements and is approved for extended aerobatics including inverted flight and rolling manoeuvres.

Variants

SZD-50-1 Dromader
The initial design and prototype of the Puchaz series, first flown on 21 December 1976; two built.
SZD-50-2 Puchacz
Initial production variant first flown on 13 April 1979.
SZD-50-3 Puchacz
Later production standard with fin mounted 300 mm (12 in) higher, enlarged rudder and main-wheel fairing.

Specifications (SZD-50-3)

SZD-50-3 G-CJRJ at the Vintage Glider Rally, Camphill in June 2011

Data from Jane's All the World's Aircraft 1988-89[1]

General characteristics

Performance

160 km/h (86 kn) in rough air
150 km/h (81 kn) on aero-tow
110 km/h (59 kn) on winch launch

See also

Aircraft of comparable role, configuration and era

Schleicher ASK 21

Related lists

List of gliders

References

  1. ↑ John W.R. Taylor, ed. (1988). Jane's All the World's Aircraft 1988-89. London: Jane's Information Group. pp. 637–638. ISBN 0-7106-0867-5.

External links

Wikimedia Commons has media related to SZD-50 Puchacz.