Aero Chapter 06 (ADV & IUT) and 07 (TS), Performance
T-45 Aerodynamics Student Workbook
Additional questions related to problems 3 and 4:
IF YOU ABORT ABOVE THE MAX ABORT SPEED, WHAT MAY SAVE YOU?
Answer:
WHY IS TAKEOFF DISTANCE GREATER AT BUCKLEY ANGB THAN AT KINGSVILLE?
Answer:
WHAT CAUSES THE CHANGE IN RELATIONSHIP BETWEEN LIFT-OFF SPEED/TAKEOFF
DISTANCE AND MAX ABORT SPEED IN PROBLEMS 3 AND 4 ABOVE?
Answer:
WHAT IS YOUR PREPLANNED ACTION WHEN THE ENGINE SHOWS SIGNS OF FAILING AFTER
PASSING THE MAX ABORT SPEED, BUT JUST BEFORE LIFT-OFF AT BUCKLEY ANGB (USE
ANSWERS TO QUESTION 3)?
Answer:
WHAT IS THE MOST IMPORTANT DETERMINANT OF LIFT-OFF SPEED?
Answer:
REF: NATOPS 1/15/97, Chapter 11
-------------------------------------------------------------------------------------------------------------------------------------------
SOLUTION TO PROBLEM 4:
Aero Problem 4 Dry runway:
Entering the Density Ratio chart with the ambient 100-degree F temperature and going up to Kingsville’s
50-ft elevation yields a Density Ratio of 0.925. Entering the 1/2 Flap Takeoff Distance chart with the
Density Ratio, 13,000# aircraft gross weight yields a takeoff roll of 2,750 ft for “ground roll without wind.”
Entering the Velocity During Takeoff Ground Run chart with 1,000 ft, and going right to the 13,000# gross
weight, then descending and following the middle grid’s channel to the density ratio and descending to the
line in the bottom grid yields a line check speed of 93 KCAS on the left border. To determine lift-off
velocity, enter the box chart on the Takeoff Distance chart with the 13,000 pound gross weight (GW) and
read the lift-off speed of 124 KCAS in the column to the right.
-------------------------------------------------------------------------------------------------------------------------------------------
For additional sample problems with solutions, see the introductions in the NATOPS chapters that deal
with performance.
(7-99) Original
Page 65
Previous Page
