cantgetno said:Homework Statement
When its engine of power 76 kW is generating full power, a small single-engine airplane with mass 660 kg gains altitude at a rate of 2.8 m/s.
What fraction of the engine power is being used to make the airplane climb?
Homework Equations
total power=76x10^3 W
mass=660 kg
dx/dt=velocity=2.8 m/s
Power=mass x velocity
The Attempt at a Solution
(660x2.8)/(76x10^3) x 100 = 2.4% but this is wrong and I am not sure where I've gone wrong
cantgetno said:oh of course
660(2.8+9.8)/(76x10^3) x 100 =10.9%
is that it?
cantgetno said:OK i get what you mean
so its:
660x2.8x9.8 / 76x10^3 x 100 = 23.8
thank you lots
The fraction of engine power used for flying depends on several factors such as the aircraft's weight, airspeed, and altitude. However, on average, about 80% of the engine power is used for flying.
The fraction of engine power used for flying can vary greatly between different aircraft. For example, smaller and lighter aircraft may use a higher percentage of their engine power for flying compared to larger and heavier aircraft.
Yes, the fraction of engine power used for flying can change during different phases of flight. For example, during takeoff and climb, the engine power used for flying is typically higher compared to cruise or descent.
Air temperature and density can have a significant impact on the fraction of engine power used for flying. In hot and high-altitude conditions, the air is less dense, which means the aircraft needs more engine power to maintain the same level of performance.
Yes, the fraction of engine power used for flying can be measured using various instruments and sensors on the aircraft. This information is continuously monitored by the flight crew and can also be recorded for post-flight analysis.