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.
Youâll perform one calf exerciseâeither the standing calf raise or seated calf raiseâin each of your leg workouts. Choose a load that allows you to do at least 10 reps, then perform as many sets as it takes to do 30 total reps. Rest 45 seconds between sets. Each week, try to add at least five reps to your total. When you can do 50 total reps in five sets or fewer, increase the weight by 20â30 pounds and start at 30 reps again. For variety, feel free to occasionally mix in single-leg versions of standing and seated calf raises.