Performance Characteristics 2 Flashcards
How does bank angle affect level-flight turn radius and rate of turn?
An increase in bank angle equals a smaller turn radius and quicker turn rate
How does velocity affect level-flight turn radius and rate of turn?
A higher velocity increases turn radius and decreases turn rate
What is the relationship between bank angle and load factor in a level turn?
As bank angle increases, so does load factor.
On the V_g diagram, where is the aerodynamic lift limit and what is it?
It is indicated by the blue curved altitude lines on the diagram are aerodynamic lift limits. These lift lines are determined by
C_L max AOA and show the accelerated stall speed of the aircraft
On the V_g diagram how do you identify the structural load limits?
By the black dashed lines on the top and bottom of the diagram
On the V_g diagram, how do you identify the aeroelastic limits and what does that mean?
The dashed red lines on the right side of the graph show the aeroelastic limits. They represent the maximum airspeed the aircraft structure can withstand based on certain altitudes.
On the V_g diagram, how do you identify the maneuvering airspeed and what does it mean?
The top left corner, indicated by the green dot, is the cornering velocity. It is the minimum airspeed at which the aircraft can reach the maximum load factor. At this spot, both turn radius and turn rate are optimized and it is the quickest and tightest turn the aircraft can perform.
What is specific energy / energy height?
The aircrafts total energy divided by its weight to allow you to compare the energy of one aircraft to another
What is excess power?
Excess power is the difference between power available and power required
What is specific excess power?
The rate of change in total energy state… basically, the energy state of your aircraft
PS = Excess Power/Weight
Where is cornering velocity on the EM diagram?
The green dot, the intersection point at max lift and max structural limit
What is the max sustained turn rate on the EM diagram?
The blue dot, the highest power on the zero specific power (PS) curve
What is max sustained G on the EM diagram?
The orange dot, located where the zero specific excess power (Ps) curve is tangent to a constant load factor line
Where is the minimum sustained turn radius on the EM diagram?
Red dot, the point where the zero specific excess power curve is tangent to the turn radius line
What does it mean if you have Ps = 0?
You are maintaining your energy state
