Testing the flaps is part of every pre-flight check. These simple flaps are common on small planes like this Cessna 172.

U.S. Centennial of Flight Commission home page

Testing the flaps is part of every pre-flight check. These simple flaps are common on small planes like this Cessna 172.

Testing the flaps is part of every pre-flight check. These simple flaps are common on small planes like this Cessna 172.

Credits - NASA

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