With this information, you can calculate the quantity of feet per minute 639 knots is equal to.
¿What is the inverse calculation between 1 foot per minute and 639 knots?
Performing the inverse calculation of the relationship between units, we obtain that 1 foot per minute is 1.5453412e-05 times 639 knots.
Which is the same to say that 639 knots is 64710.63 feet per minute.
Six hundred thirty-nine knots equals to sixty-four thousand seven hundred ten feet per minute. *Approximation
A foot per minute is one times six hundred thirty-nine knots. *Approximation
