The U.S. military is investing in manned and unmanned aircraft that can take off, hover and land vertically. These so-called vertical takeoff and landing (VTOL) vehicles could one day transport troops, weapons or cargo to and from the battlefields.
The Defense Advanced Research Projects Agency (DARPA) — the branch of the U.S. Department of Defense tasked with developing new technologies for the military — is fostering the development of new helicopter-type vehicles as part of its VTOL X-Plane program.
This design, submitted by Sikorsky Aircraft Corporation, was one of four chosen to receive funding from DARPA for the first phase of the VTOL X-Plane program.
Here are photos of other military vehicles designed to take off and land vertically.