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.
The condition starts by small nodules of collagen growing under the skin of the palm and fingers. Eventually, these join together and form a cord that contracts and pulls the finger down towards the palm so it is at right angles to the other fingers. The little and ring fingers are most usually affected.