per nautical mile, what is the rate of climb in feet per minute?
• Rotate the inner scale so that the Index is directly under the groundspeed of 90 on the outer scale. • Locate 300 on the inner scale and directly above 300 is 450 on the outer scale. • A climb rate of 300 feet per nautical mile with a 90-kt. groundspeed is equivalent to a climb rate of 450 feet per minute. • Converting Mach Number to True Airspeed • Use the following procedure to convert a Mach number to true airspeed. • Rotate the inner scale so that “MACH NO. INDEX” appears in the right window. Align the arrow with the known outside air temperature. • On the inner scale, locate the Mach number. • Directly above the Mach number, read the true airspeed on the outer scale. • EXAMPLE: With an outside air temperature of +10°C, what is the true airspeed at Mach 0.9? • Rotate the inner scale so that the arrow labeled “MACH NO. INDEX” is opposite the OAT of +10°C in the right window. • Locate Mach 0.9 on the inner scale. • Directly above 0.9 is the true airspeed of 590 kt. on the outer sca
