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.
4. Do calf raises. To do a calf raise, simply stand with your legs a hips' distance apart and hold on to a surface like a chair or a table with your hands. Then, lift up your legs so you're just standing on your toes and the balls of your feet, lifting your heels in the air.our body should be making a reverse V shape, with your ears near your elbows and your heels as close to the floor as they can go. 1  Hold this pose for at least 25-30 seconds as you feel the burn in both of your calves. 2  The closer you get your heels to the floor, the more effective the stretch.