APLA Flashcards
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