Because of their unique versatility in aerial transportation, helicopters are some of the most important machines of the modern era. Capable of vertical take-off and landing, helicopters are used in ...

IIIF provides researchers rich metadata and media viewing options for comparison of works across cultural heritage collections. Visit the IIIF page to learn more. Single engine, low single piece wing, ...

In response to a congressional request, the committee will conduct a study and issues a report on lead emissions from piston-powered general-aviation aircraft. The committee’s report will include ...

The first recognizable internal combustion engine was developed by Nikolaus Otto in 1861. Since then, the gasoline-powered engine has evolved immensely. However, the principles that underlie how ...

Piston-driven aircraft are significantly more affordable to purchase than turboprops, with models generally ranging from $100,000 to $1 million. Training and certification for piston planes are less ...