The whole muscle of which the muscle fibres are a part can develop force in several different ways, e.g. with the muscle as a whole shortening, lengthening or maintaining the same length while the muscle fibres contract. List of types of muscle contraction. Isotonic (of which there are two types: concentric and eccentric)
While some flight schools will advertise that you can get a pilot's license for around $5,000, the reality is that the cost generally works out to be more. A commercial pilot's license -- bigger plane, more than twice the flight time -- generally costs $40,000 to $50,000.
Based on this information (and the details below) you should budget a minimum of $5,000 - $6,000. The two seater C-152 used by most private pilot students rents for $85/hr (wet) plus instructor costs of $40/hr.= $125.00/ hr.