General Flashcards
(391 cards)
How does temperature affect takeoff distance and performance?
The colder the air the denser . Dense air has more air molecules for the propeller to grab and thrust the aircraft forward.
Thus, lower temperatures equal greater aircraft performance. Colder temperatures mean shorter takeoff distance and shorter landing distance required.
How do calculate pressure altitude without using an altimeter?
Pressure altitude = (standard pressure- current pressure setting) x 1000 + field elevation.
Example: altimeter30.01 and field elevation 6,000 feet.
Pressure altitude = (29.92- 30.01)x 1000+ 6000’= 5910’
How do you calculate density altitude?
Density altitude= pressure altitude+ 120(actual outside air temp(celsius)- standard temp(celcius))
what is camber? Can it be changed?
The curvature of the wing
It is changed by extending or retracting flaps
What is chord line?
An imaginary straight line connecting the leading and trailing edge of an airfoil.
What is the angle of incidence? Can it be changed?
The acute angle formed between the chord line of an airfoil and the longitudinal axis of the aircraft. It cannot be changed.
What is center of gravity?
The point at which the aircraft would balance if it were suspended at that point.
What are the effects of an aft center of gravity?
1.Decreased longitudinal stability
2. Faster cruise speed due to reduced drag.
3.Lower stall speed due to less wing loading.
4.Poor stall/spin recovery
5.Quick rotation on takeoff
6.possibility of flaring too much and tail striking on landing.
What are the effects of forward center of gravity?
1.Increased longitudinal(pitch) stability
2.Lower cruise speed due to increased aoa/drag.
3.Higher stall speed due to increased wing loading.
4.More back pressure required to maintain level flight.
5.Longer takeoff distance and harder to rotate on takeoff.
6. Decreased fuel efficiency due to aoa/drag.
What does an increase in load factor have on stall speed?
An increase in load factor indicates a heavily loaded plane, resulting in a higher stall speed and making stalls possible at seemingly safe speeds.
A higher Angle of attack is required to generate the required lift. Too high of a load factor can also result in structural failure.
What is load factor?
The ratio between the lift generated by an aircraft’s wings at any given time to the total weight of the aircraft, expressed in g’s
What is the relationship between maneuvering speed and weight?
1.Maneuvering speed decreases with lighter gross aircraft weight because there is less weight to stabilize the aircraft.
2.light aircraft can get thrown around in turbulence easier.
3.For example, Va may be 100 knots when airplane is heavily loaded, but only 90 knots when the load is light.
What is standard empty weight?
Weight of airframe, engines, and operating equipment that have fixed locations and are permanently installed in the aircraft including fixed ballast, hydraulic fluid, unusable fuel and full engine oil.
What is basic empty weight?
Standard empty weight plus the weight of all optional and special equipment that have been installed.
What is useful load?
Difference between Max Gross weight and basic empty weight; weight of the pilot, copilot, passengers, baggage, usable fuel, drainable oil.
What is payload?
The load available for passengers, cargo, and baggage after weight of the pilot, crew, and fuel is deducted from the useful load
What is operational weight empty?
Basic empty weight of an aircraft plus weight of the pilot, crew and all fluids necessary for operation such as engine oil, engine coolant, water, and unusable fuel. Excludes usable fuel and payload.
What is usable fuel?
Fuel available for flight planning.
What is unusable fuel?
Fuel remaining in tanks and fuel lines after all usable fuel has been used. About 2 gallons for our plane.
What is max gross weight?
The maximum authorized weight of the aircraft and all of its equipment as specified in the type certificate data sheet(tcds) for the aircraft
What is max takeoff weight?
The maximum weight approved for takeoff.
What is max ramp weight?
The maximum weight approved for ground maneuvering, total weight of a loaded aircraft including all fuel. It is greater than the takeoff weight due to the fuel that will be burned during taxi and run-up operations.
Zero fuel weight?
The maximum weight, exclusive of usable fuel.
What’s Passenger weight?
Weight of all passengers