APLA Flashcards
(39 cards)
For a jet needing LDR to not exceed 60% of LDA and a prop not exceeding 70% of LDA. How do you calculate the LDA needed for the LDR?
Divide LDR by the %
Eg jet LDR of 1500m needs an LDA of 2500m
1500/0.6 = 2500
Rearward CG advantages and disadvantages
ADVANTAGES:
Lower drag
Lower stall speed
Less power required
Increased range
DISADVANTAGES:
Higher Vmca
Reduced longitudinal stability
Forward CG advantages and disadvantages
ADVANTAGES:
Lower Vmca
Increased longitudinal stability
DISADVANTAGES:
More drag
Higher stall speed
More power required
Reduced range
What is the result of ram temperature rise
Thrust output from ram is less at very high speeds
What happens to best range speed with less weight and more TW
Decreases
What happens to best range speed with less weight and more TW
Decreases
Does AOA vary for minimum thrust in level flight with weight changes
No
Is MLRC faster or slower than max range and what happens to thrust with fuel burnt weight reduction
The same but has a reduction in thrust as fuel is burnt and weight reduces
Where is CP generally located
33%MAC
What is MAC
Mean aerodynamic chord is the average chord of wing accounting for sweep, washout and taper
Speed certification is based on the most adverse CG
What CG is Vs based on
Forward CG
Speed certification is based on the most adverse CG
What is the CG of Vmca
Rear CG
Average TAS in a climb formula
TAS average = ANM / ETI x 60
Average rate of climb formula
ROC = PA climbed / ETI
SAR formula
SAR= TAS / FF
SGR formula
SGR = GS / FF
Eg 450kts and FF of 4500kg per hour
450 / 4.5 = 100nm per T of fuel
On the intergrated range tables what do you need to do to TAS with temperature
Increase TAS by 1kt per C above ISA
Decrease TAS by 1kt per C below ISA
V1 is:
Vef plus ________
Atleast Vmcg plus________
Max of _______
Vef plus 1 second
Atleast Vmcg plus 1 second
Max of Vr
Vr musnt be less than V1 or _____
1.05 Vmca
V2:
Is reached before____
Not less than______
Not less than_______
Is reached before 35ft
Not less than 1.1Vmca
Not less than 1.2Vs
If V1 is not changed what will a wet runway do to the accelerated stop limited BRW
Reduce it
What will adding a stopway to ASDR do to gross weight
Allow a higher gross weight with a higher V1 speed
In cruise at constant Mach and altitude , what will an increase in OAT do to TAS and SAR
TAS will increase and SAR will not change
Where is the B727 CG datum
Just in front of the main landing gear