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.
Try these simple, effective exercises for strengthening your calf muscles. You'll target the two muscles that make up the calf: 1  The gastrocnemius muscle, which gives the calf its rounded shape.2  The soleus, which is the flatter, longer muscle running underneath the gastrocnemius and lower down your leg.ry these simple, effective exercises for strengthening your calf muscles. You'll target the two muscles that make up the calf: 1  The gastrocnemius muscle, which gives the calf its rounded shape.