A) Electric plane tested by NASA
B) Solar-powered two-seater aircraft designed by Japan.
C) Space observatory launched by China
D) Reusable rocket designed by ISRO
Correct Answer: D
Solution :
Exp. [a] NASA Langley researchers designed and built a battery-powered, 10-engine remotely piloted aircraft. Called the Greased Lightning GL-10, the prototype has a 10-foot wingspan and can take-off like a helicopter any fly efficiently like an airplane. The full-scale GL-10 will be a diesel-electrical tilt-wing. Currently NASA has built a 50% scale 10-foot wing span all electric battery powered demonstrator. The wings and horizontal stabilizer rotate with fixed motor pods to facilitate vertical flight.
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