EASA ATPL 081 Principles of Flight case studies
EASA ATPL 081 Principles of Flight · Put your knowledge to work in context.
Principles of Flight is one of the fourteen theoretical knowledge subjects a candidate must pass before sitting the EASA Airline Transport Pilot Licence (ATPL) examinations. The subject code 081 identifies it within the ATPL syllabus. The EASA ATPL 081 Principles of Flight case studies are 5 cases and about 4,260 words.
1Level Turn at FL350: Which Buffet Is It?
A 20 000 kg twin-jet is holding at FL350 at M0.78. Wing area is 55 m², CLmax 1.40 and MMO 0.82.
892 words, about 4 min2Base-to-Final Stall in a T-tail Twin
A twin turboprop with a T-tail, MTOW 5 700 kg, is on a visual approach at 4 000 ft. Landing mass is 5 100 kg with the CG at 34% MAC; the aft limit is 35%.
816 words, about 4 min3Coffin Corner at FL410
A swept-wing business jet of 18 000 kg and wing area 40 m² cruises at FL410 at M0.80. The AFM gives MMO 0.82 and, for this configuration, a high-altitude buffet-onset lift coefficient of 0.60 - the wing's usable CL at high Mach, where CLmax has fallen from its low-speed value of 1.35.
812 words, about 4 min4Blade Angle and Tip Mach on a Turboprop
A twin turboprop with 3.93 m diameter propellers cruises at FL250, TAS 280 kt, propeller speed 1 200 rpm. The AFM quotes a propeller efficiency of 0.84 at this condition.
902 words, about 5 min5Wake Turbulence on Short Final
You are PF of a 60 t twin-jet on a 4 NM final at VREF + 5 kt, cleared to land behind a heavy four-engine jet that crossed the threshold 90 s earlier. Surface wind is 200°/15 kt, runway 27 in use, giving a crosswind of roughly 14 kt from the left; OAT +22 °C and light to moderate turbulence.
838 words, about 4 min