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.
First get under the pads of the standing calf raise machine, lock your knees and lower your heels as low as possible while keeping your knees locked. This will insure that both the soleus and the gastrocnemius are fully stretched. If you unlock the knees, the gastrocnemius will not have a full stretch. Hold the stretch for a full 15 seconds count. Bend you knee to lower the shoulder pads and take a five second break during which you increase the weight by 2-3 plates. Repeat the stretch-rest-add weight process for another 3-5 reps. Then proceed to the seated calf raise machine to give your soleus muscles a greater stretch.