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.
The Anatomy of the Calves. The calves are made up of two powerful muscles: the gastrocnemius, which is the most externally visible muscle, and the soleus, which is a deep muscle that lies underneath the gastrocnemius.These two muscles work together to manipulate the foot and ankle joint, as well as flex the leg at the knee joint.o what Iâm saying is for you to do your calf workout on the leg press. You place your toes and pad of your feet on the bottom edge of the leg press with your heals off the edge and you do your calf raises like that.