As I recall, earlier versions of the 737 cruised at a relatively slow .74M (485mph), while later versions have increased to around .78M (510mph). Maximum speed is ,82M, or 51 â¦ 1 mph.     If you have flight simulator 2004 or Flight Sim X the top speed is 340 kph.s I recall, earlier versions of the 737 cruised at a relatively slow .74M (485mph), while later versions have increased to around .78M (510mph). Maximum speed is ,82M, or 51 â¦ 1 mph.     If you have flight simulator 2004 or Flight Sim X the top speed is 340 kph.
Some of the major muscles of the calf include: 1  Gastrocnemius (calf muscle): One of the large muscles of the leg, it connects to the heel. It flexes and extends the foot, ankle, and knee.  Soleus: This muscle extends from the back of the knee to the heel.
When you perform leg extensions, you contract the quad to bring your knees up against the weighted resistance. While many other exercises such as squats, lunges or deadlifts also provide a heavy workout for the quads, they do not isolate the muscle like a leg extension does. Any exercise that requires you to contract your quadriceps against resistance can accomplish the same effect as a leg extension machine.