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.
Secondly, to become an airline pilot, you must hold a Commercial Pilots License (CPL) or Commercial Pilot Certificate in some countries. This allows you to make money as a pilot, and usually requires about 200 flight hours to gain, and cannot be gained until you are 18 years old. Instrument Rating is the primary rating that you need to add to your qualifications to become an airline pilot. This allows you to fly in cloud and navigate with reference to the aircraft instruments.