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.
Calf stretches can really help reduce knee pain and improve flexibility. The calf is made up of two muscles on the back of your lower leg, gastrocnemius (which starts just above the knee) and soleus (which starts just below the knee). The calf muscles main job is to pull the foot down, like when you point your toes.You have to stretch the two muscles in a slightly different way, with a straight knee to bias gastrocnemius and with a bent knee to bias soleus.Here you will find a selection of calf stretches to stretch both the muscles on the back of your lower leg which can help relieve knee pain and prevent injuries.ou have to stretch the two muscles in a slightly different way, with a straight knee to bias gastrocnemius and with a bent knee to bias soleus. Here you will find a selection of calf stretches to stretch both the muscles on the back of your lower leg which can help relieve knee pain and prevent injuries.