Aerodynamics and Aircraft Flashcards
Lateral axis is
Along the wings
Useful Load
total weight of passengers, fuel, baggage and pilots
Basic Empty Weight
Standard Empty Weight plus optional equipment (GPS, ect.)
Standard Empty Weight
airframe plus engine, oil, hydro, unusable fuel
Single engine failure on a multiengine plane reduces climb by…
80%
Banking toward the operative prop…
increases climb performance
The critical engine on most light multiengine planes with clockwise rotating props is the…
left engine, because of p-factor of the right prop
How does a cruise propeller differ from a climb propeller during cruise operations?
A cruise prop has a higher pitch therefore more drag. More drag results in lower RPM and less hp capability. Decreases performance during takeoff and climb but increases efficiency during cruise flight.
Phugoid Oscillation
A slow rhythmic change in pitch and altitude, accompanied by changes in airspeed as aircraft climbs and descends.
In theory, if airspeed of an aircraft is cut in half while in level flight, parasite drag will become…
one fourth as much
Profile drag =
Skin friction
In theory, if the airspeed of an airplane is doubled while in level flight, parasite drag will become
four times greater
While maintaining a constant angle of bank and altitude in a coordinated turn, an increase in airspeed will..
decrease the rate of turn resulting in no change of load factor
Why does increasing the speed also increase lift?
The increased impact of the relative wind on an airfoils lower surface creates a greater amount of air being deflected downward
The load factor in a level coordinated turn with 60 degrees of bank is
2 Gs
What effect does uphill runway slope have on takeoff performance
increases takeoff distance
Lift on a wing is most properly defined as the…
force acting perpendicular to the relative wind.
The angle of attack of a wing directly controls the…
distribution of pressure acting on the wing.
Lift Equation
Lift= CL x P x V squared x S
A glide slope is being flown. What characteristics should be observed when a headwind shears to a constant tailwind?
Pitch attitude- decreases, Required thrust- increases then decreases, vertical speed increases, IAS decreases then increases to approach speed
To establish a climb after takeoff in a plane with a constant speed prop. the output of the engine is reduced to climb power by decreasing manifold pressure and…
decreasing RPM by increasing prop blade angle.
Load factor is the lift generated by the wings of an aircraft at any given time…
divided by the total weight of the aircraft.
If necessary to take off from a slushy runway, the freezing of landing gear mechanisms can be minimized by…
recycling the gear
