IJSRP, Volume 9, Issue 9, September 2019 Edition [ISSN 2250-3153]
Mandeep Chetry, Han Dong
A helicopter is an aircraft that can take off and land vertically. A helicopter is also called a rotary aircraft. It can hover and rotate in the air and can move sideways and backwards while aloft. Nowadays, many parts of helicopters are built of composite materials. Composites are made of two or more materials, combined together to obtain a new matter with properties that are superior to those of individual components.