The engine cracked on the first test flight.

在首次试飞时，发动机发生裂纹。

youdao

They didn't even have time to celebrate when the first test flight of the multicopter went well.

他们甚至没时间去庆祝飞机“首航”成功。

youdao

The first test flight will be toward the end this year, according to André Borschberg, the chief executive of the project.

据本项目的首席执行官André Borschberg透露，”太阳动力号“的首次试航预计在今年年底。

youdao

Three astronauts were named for the first manned Apollo test flight: Virgil Grissom, Edward White and Roger Chaffee.

VOA: special.2009.07.08

The first test flight in Japan was Sunday, All Nippon Airways officials said.

CNN: SHARE THIS

Although he has flown HB-SIA in a simulator, Mr Borschberg says he will not really know how it performs until the first test flight later this year.

ECONOMIST: Solar-powered manned flight

Filton Airport had been in operation for more than 100 years and saw the first UK test flight of the Concorde prototype in 1969.

BBC: Cotswold Airport, Kemble