With this information, you can calculate the quantity of feet per second 129 knots is equal to.

¿What is the inverse calculation between 1 foot per second and 129 knots?

Performing the inverse calculation of the relationship between units, we obtain that 1 foot per second is 0.0045928977 times 129 knots.

Which is the same to say that 129 knots is 217.72747 feet per second.

One hundred twenty-nine knots equals to two hundred seventeen feet per second. *Approximation

A foot per second is zero times one hundred twenty-nine knots. *Approximation