Report Abuse. To get airborne, a Boeing 737 needs to reach a speed of 140 knots (its rotate speed or Vr). For landings, I usually maintain 150knots (MS-FlightSimulator). These speeds really depend on an airplane's design, weight, wing shape and size, wind/weather factors, etc.Fulani Filot Â· 9 years ago.o get airborne, a Boeing 737 needs to reach a speed of 140 knots (its rotate speed or Vr). For landings, I usually maintain 150knots (MS-FlightSimulator).
The Muscles Worked During Calf Raises. Calf raises target the muscles on the back of your lower legs. Photo Credit fatchoi/iStock/Getty Images. The calf raise exercise targets the muscles on the back of your lower legs that facilitate plantar flexion, or ankle extension. These muscles contract to lift your heels off the floor during the upward-movement phase of the exercise, and to control the speed of movement during the downward movement phase.
Tricks for Performing Standing Calf Raises: 1  To work the inside of your calves, set your feet farther apart and rise up onto the inside balls of your feet. 2  To work the outside, set your feet in close and rise up on the outside balls of your feet.