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.
Getting civilian training is expensive. Flight schools will require you to provide some proof of funds before you are admitted. You can expect to pay $10,000-$15,000 for the training it will take to pass the helicopter pilot certification exams, plus $18,000-20,000 for commercial certification. Flight time with an instructor costs approximately $200 an hour. For time flying solo, you might pay around $160.