The wires are attached in such a way that the operator may control the upward and downward flight. The models are able to perform flight maneuvers, such as looping, diving, acrobatics, and high-speed flying. Control-line models are powered by gasoline or jet engines. Ship Models Models of oceangoing vessels range in size from miniatures made to scale up to working models. Miniatures can be finely wrought, hand-carved and painted sailing ships or plastic models of modern warships.
Miniatures are primarily decorative.
Others are used in classrooms, in ship design, or as playthings. Ship models displayed in museums are of great historical value. Many were originally made for purposes related to ship design. Others were built specifically for display. The latter are perhaps the highest expression of the model maker's craft.