For jet-propulsion aeroplanes, the maximum endurance speed corresponds with the...
Refer to figure.
Jet Aircraft Endurance
The rate of fuel consumption is a minimum when drag, D, is a minimum. Hence, the maximum endurance flight condition of a jet is at the minimum drag condition (VMD). Then, the maximum endurance for a jet occurs at the maximum L/D and also corresponds to the Maximum Angle of Climb speed, VX.
VX - Best Angle of Climb Speed
The IAS at which the airplane generates the greatest amount of Excess Thrust and is therefore capable of its steepest climb gradient, is called VX. For an airplane powered by jet engines, VX is the same IAS as VMD. VX for a propeller airplane is less than VMD and at low altitudes will be in the region of VMP.
The most correct option, in this case, is "Maximum Gradient of Climb Speed". Even though, the correct option should be "Maximum angle of climb speed".
Jet Aircraft Endurance
The rate of fuel consumption is a minimum when drag, D, is a minimum. Hence, the maximum endurance flight condition of a jet is at the minimum drag condition (VMD). Then, the maximum endurance for a jet occurs at the maximum L/D and also corresponds to the Maximum Angle of Climb speed, VX.
VX - Best Angle of Climb Speed
The IAS at which the airplane generates the greatest amount of Excess Thrust and is therefore capable of its steepest climb gradient, is called VX. For an airplane powered by jet engines, VX is the same IAS as VMD. VX for a propeller airplane is less than VMD and at low altitudes will be in the region of VMP.
The most correct option, in this case, is "Maximum Gradient of Climb Speed". Even though, the correct option should be "Maximum angle of climb speed".
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