Aerodynamics first: The altitude factor of $c_l \cdot Ma^2$ tells you how much lift can be produced at a given flight Mach number, and the wing loading then gives you the minimum density for sustained flight. 0.4 is a good value for $c_l \cdot Ma^2$, and 30 kg/m$^2$ is a feasible wing loading for flight at 30 km.
Get worse with activity and improve with rest. Myasthenia gravis (MG) can affect any of the muscles that you control voluntarily. It can affect muscles of the face, hands, eyes, arms and legs and those muscles involved in chewing, swallowing and talking. Muscles that control breathing and neck movement also can be affected.
Like the more common type of myasthenia gravis it is also an autoimmune condition. People with Lambert Eaton myasthenic syndrome are also weak and fatigue easily, but eye symptoms are less common and it is often associated with a particular type of lung cancer.yasthenia gravis itself does not cause pain, but the weakness may lead to non-specific aches and pains. For instance, neck pain may occur because of weakness in the neck muscles. Only the voluntary muscles are affected by myasthenia gravis so the heart and the gastrointestinal tract are spared.