Conk

The Spitfire's fuel was gravity fed. If you flew upside down, the engine would conk out.

She came skipping to me just now, clapping her little hands and bleating about how very, very happy she was, dear Mrs Travers. The silly young geezer. I nearly conked her one with my trowel. I'd always thought her half-baked, but now I think they didn't even put her in the oven.

The barbecue cook, wearing a dirty white apron, his conked hair reddish and metallic in the pale sun, and a cigarette between his lips, stood in the doorway, watching them.

Therefore, have two or more engines, so that there is still some power left if one engine conks.

I watch television when it's playing, but it done conked out. Everything is conked out.