Cruise Performance

Define Cost Index

• Cost Index is a ratio of time related costs to fuel cost. And it equates to the most economic flight speed.

• Cost Index is a method for calculating project risks.
• Cost Index refers to the total revenue generated by a project.
• Cost Index is a measure of project duration.

If time related costs are relatively low or the fuel costs are relatively high then the cost index will be

• low
• high

If time related costs are relatively high or the fuel costs are relatively low then the cost index will be

• low
• high

The cost index is entered into the FMC and is used to determine the minimum cost speed, commonly referred to as what speed?

• Cruise Speed
• ECON Speed

• Maximum Speed
• Climb Speed

Define Specific Range also known as - Specific Air Range or Specific Ground Range

• Specific Range is the total weight of an aircraft divided by its fuel capacity.
• Specific Range refers to the maximum altitude an aircraft can reach on a given fuel load.
• Specific Range is the speed of an aircraft measured in knots per hour.
• Specific Range is the air or ground distance an aircraft can achieve for a unit weight of fuel burned

The difference between specific air range and specific ground range is?

• The prevailing wind conditions

• The difference is based on the weight of the cargo being transported.
• The difference is only in the speed of the vehicle.
• The difference is the altitude of travel and the type of aircraft.

What's the definition of maximum range cruise speed?

• The speed at which an aircraft can carry the maximum payload.
• The speed that minimizes fuel consumption regardless of distance.
• The speed that allows for the fastest ascent to cruising altitude.
• The speed at which the aircraft will travel the maximum distance for a given amount of fuel or MRC = Cost Index 0

In a turbo fan engine aircraft the IAS for maximum range equates to ___ which is ___ faster than the minimum drag IAS (V imd)

• 1.30 x V imd;

  30%

• 1.23 x V imd;

  23%

• 1.32 x V imd;

  32%

Long range cruise (LRC) speed is about ___ faster than the maximum range cruise speed. LRC speed incurs only a ___ penalty in range performance.

• 5% faster; 1% penalty

• 8% faster; 7% penalty
• 15% faster; 3% penalty
• 1% faster; 5% penalty

Tailwind G/S will ___ TAS and the maximum value of groundspeed to fuel flow will occur at a ___ airspeed

• decrease; higher
• exceed; lower

• maintain; constant
• reduce; variable