E170 - Supplemental Performance

Question 0

Why does specific range decrease with higher altitudes?

Answer 0

The aircraft requires a greater AOA to maintain altitude which creates additional drag increasing fuel burn. There are also concerns of temperature increases due to tropopause.

Question 1

What is the max buffet margin for smooth air?

What is the max buffet margin for rough air?

Answer 1

1. 3 for smooth

1. 5 for rough