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.
The U.S. Bureau of Labor Statistics reports that the average salary of a Commercial Pilot is $73,490 per year. The lowest-paid 10 percent of Commercial Pilots earn $34,860, while the highest-paid 10 percent earn more than $119,650 annually. The middle 50 percent of Commercial Pilots are paid between $48,390 and $89,970 per year.