<P> A redline mark indicates V , or velocity ( never exceed ) . This is the maximum demonstrated safe airspeed that the aircraft must not exceed under any circumstances . The red line is preceded by a yellow band which is the caution area , which runs from V ( maximum structural cruise speed ) to V. A green band runs from V to V. V is the stall speed with flaps and landing gear retracted . A white band runs from V to V. V is the stall speed with flaps extended , and V is the highest speed at which flaps can be extended . Airspeed indicators in multi-engine aircraft show a short radial red line near to the bottom of green arc for V , the minimum indicated airspeed at which the aircraft can be controlled with the critical engine inoperative and a blue line for V , the speed for best rate of climb with the critical engine inoperative . </P>
<P> A redline mark indicates V , or velocity ( never exceed ) . This is the maximum demonstrated safe airspeed that the aircraft must not exceed under any circumstances . The red line is preceded by a yellow band which is the caution area , which runs from V ( maximum structural cruise speed ) to V. A green band runs from V to V. V is the stall speed with flaps and landing gear retracted . A white band runs from V to V. V is the stall speed with flaps extended , and V is the highest speed at which flaps can be extended . Airspeed indicators in multi-engine aircraft show a short radial red line near to the bottom of green arc for V , the minimum indicated airspeed at which the aircraft can be controlled with the critical engine inoperative and a blue line for V , the speed for best rate of climb with the critical engine inoperative . </P>
what does the lower limit of the green arc on an airspeed indicator represent
what does the lower limit of the green arc on an airspeed indicator represent
the minimum indicated airspeed at which the aircraft can be controlled with the critical engine inoperative
the minimum indicated airspeed at which the aircraft can be controlled with the critical engine inoperative