how far would I fly for 18 hours at 490 KIAS
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To determine how far you would fly for 18 hours at 490 KIAS (Knots Indicated Airspeed), you need to know the distance you will cover in one hour, which is referred to as your ground speed.
Ground speed is affected by various factors such as wind direction and speed, altitude, and temperature. Therefore, to calculate the ground speed, you need to know the wind conditions at your cruising altitude.
Assuming no wind and using the standard conversion of knots to miles per hour, you would cover a distance of 8,820 miles (490 x 1.15078 x 18) in 18 hours at 490 KIAS. However, this is only an estimate, and your actual ground speed may vary depending on the wind conditions.
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