Pilatus Porter - Provision of Revised Take-Off and Landing Performance Data

摘要

The provision of additional take-off and landing data to extend Pilatus Porter flight manual information from the previous gross weight limit of 5700 lb (2585 kg) to the currently authorised limit of 6100 lb (2767 kg) was requested under Technical Investigation No 698. Using ARDU computer facilities, the existing flight manual take-off and landing data were extrapolated to predict performance at the increased weight. Take-off and landing performance was then evaluated during five test periods totalling 5.5 hours in day VMC. Tests were conducted with aircraft gross weight in the range 4380 - 6090 lb (1987 - 2762 kg) using sealed and grassed runways. Aircraft performance was also evaluated with external stores carried on underwing racks. The data generated satisfied both the currently available performance charts and the predicted performance from the extrapolated charts. Carriage of the external stores on the wing racks increased the ground roll by 50% and the distance to climb to 50 ft by 20%. Operation from short dry grass did not significantly affect take-off distances but landing distances were reduced by 20%. Inclusion of the revised charts in the flight manual is recommended. (Author)