Kapooley

29th Jul 2002, 15:40

Im stuck on these two questions:

An increase of 0.15 in Mach No results in an increase of 93 kt in TAS. If the temp dev from ISA is +9 c, the FL is??

a. FL200

b. FL220

c. FL130

d. FL150

I know the correct answer is b FL220, but im not sure how to work it.

Also I'm stuck with this one,

An aircraft is flying at 1100 kt TAS at FL650, a change of 0.1 Mach causes a change of 57 kt TAS. The temp dev from ISA at FL650 is?

a. -6 c

b. +6 c

c. -3 c

d. +3 c

The correct answer is -3

Again not sure how you work it out, any pointers greatly received!! Thanks!

An increase of 0.15 in Mach No results in an increase of 93 kt in TAS. If the temp dev from ISA is +9 c, the FL is??

a. FL200

b. FL220

c. FL130

d. FL150

I know the correct answer is b FL220, but im not sure how to work it.

Also I'm stuck with this one,

An aircraft is flying at 1100 kt TAS at FL650, a change of 0.1 Mach causes a change of 57 kt TAS. The temp dev from ISA at FL650 is?

a. -6 c

b. +6 c

c. -3 c

d. +3 c

The correct answer is -3

Again not sure how you work it out, any pointers greatly received!! Thanks!