Climbing & Decsending Flashcards
For a steady climb, the thrust must be efficient to overcome
- Drag
- Help lift the weight of the airplane at a vertical speed (rate of climb)
In a climb, the lift force is greater / less than weight?
Less!
In a climb, thrust is greter /less then drag?
Greater! and this help compensate for the reduced lift force
The higher the weight the ___ climb performance
The less climb performance
Angle of climb different name
Climb gradient
Angle of climb depends on
The excess thrust
Maximum gradient (angle) climb
Best used to clear obstacles, gains the greatest height in the shortest horizontal distance
Vx
maximum gradient speed. use to clear obstacles fast.
Vy
Maximum rate climb speed. Used to reach high altitude as quciky as possible, gains the most height in the shortest time.
Maximum rate climb
Gains the most height in the shortest time
When weight is increased, the climb performance is
decreased
When temparatue increases, the air density?
Lowers
When temprate increases the climb perforamnce is
decreased
When altitude increases (so does the air density lowers) the climb perforamnce is
decreased
Ceiling
The altitude at which steady climb perforamnce falls close to zero
Service ceiling
When the rate of climb of a steady climb has fallen to 100ft /min
Absolute ceiling
When the rate of climb is 0
Headwind / tailwind effect on climb OVER THE GROUND
Headwind will increase climb. Tailwind will decrease
Does wind affect rate of climb not over the ground?
no
Overshoot effect (during windshear) (an increase of headwing component)
The climb perforamce will increase
Conditions for overshoot effect
Flying into an increasing headwind
A decreasing tailwind
Into an updraft
Conditions for undershoot (climb perforemce decreased)
A decreasing headwind
An increasing tailwind
Into a downdraft
The four forces in STEADY STRAIGHT CLIMB:
1. Lift equals weight and thrust equals drag
2. Lift equals weight and thrust is greater than drag
3. Thrust is greater than drag and lift is greater than weight
4. Thrust is greater than drag and lift is less than weight
4
The angle of climb depends upon:
1. Excess lift and weight
2. Excess thrust and weight
3. Excess thrust and minimum drag
3
What is Vx?
1. The maximum gradient of climb, giving the greatest height in the shortest time
2. The maximum gradient of climb, giving the greatest in the shortest horizontal distance
2
When Vx is used, what shoudl the pilot take into account
High power settings means poor engine cooling
In a glide with no thrust, which force is balancing the drag?
Weight. (see page 143)
During a glide, if L/D is high
Shallow glide path. Will gllide a long way
During a glide, if L/D is low
Steeper glide path, will glide a short way
Flying too slow / too fast during a glide will
Make you glide a shorter way
Best L/D ratio glide is done by
maintaing the airspeed given by the designer (therefore, speed affects angle of attack)
Flaps will (glide)
steepen the glide
How does lower weight affect glide
The glide angle will be the same, the glide airpseed will be less
Glide angle will be the same for all weights!!
Glide with tailwind / headwind
With headwind, shorther distance is covered,
With tailwind, greater distance can be glided
If the L/D ratio is 5:1, and you’re 1nm above (6000 ft) how much ground distance will you glide?
5 nm
6000ft (1nm) above ground, L/D is 9:1. How much distance will be glide
9nm
The forces acting on a glide are
Lift, weight, and drag.
Take note of the weight traingle assisting in maintaing the glide
Headwind / tailwind of a glide will affect the distance over the ground. How it will affect the distance over the air mass
Nothing
In a steady glide, drag is balanced by
a component of weight
