# CPL - aerodynamics

 What is the term ‘Work’ Whenever a force SUCEEDS in producing motion, WORK is done. Work = Force x Distance (fixed and inversely proportional) Depends upon energy available, in the case of an aircraft this is the total fuel on board Maximum range requires? Minimum drag Minimum drag allows? Maximum range What does the term ’Power’ mean? ’Power’ is the RATE at which WORK is done. You can measure this with the rage fuel is burnt by the engine to make thrust. Min power = min fuel flow = maximum Endurance MAX Endurance = MIN power What is kinetic energy? The POTENTIAL to move, does not actually have to be in motion to possess kinetic energy What is CAS adjusted for? IAS adjusted for pitot position and instrument errors What is TAS? CAS ( IAS adjusted for position / instrument error) adjusted for Density error As height increases this gap will increase at roughly 2kts per 1000’ What is the ‘Coanda effect’ Tendency of an airflow to follow a surface with a gentle curvature rather than continue on straight Describe Bernoulli’s theory Pressure inside the walls of a tube decreases when velocity increases, and pressure increases as velocity decreases. Air passing through a narrower section of pipe will increase in velocity and decrease in pressure and vice versa. They are inversely proportional as one increases/decreases the other must do the opposite as total energy remains constant. How long does the laminar boundary remain? As long as the aerofoil is thickening, it then becomes turbulent past the transition layer and produces extra drag What is a laminar flow aerofoil? Where the maximum thickness is well back along the chord and therefor produces less drag What is the AoA called that produces less lift? The stalling angle of attack What is parasite drag? It’s the drag caused by air having to get out of the way of an aerofoil and the friction that is created as it does this for example. What does the minimum drag coefficient determine? The maximum speed of the aeroplane AuthorBails ID357543 Card SetCPL - aerodynamics Description Updated2022-01-26T23:26:21Z Show Answers