>Promo pic for McLaren P1 (see attached)
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>The aircraft in the background has at least 4 turbofan engines, in twin-pod configuration. That configuration is not commonly used. There are some examples such as B-36 and B-47 but those use twin turbojet, not turbofan, engines.
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>I'm 99% sure it's not a B-52H, you can Google images for those engines, the inlet looks significantly different.
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>It's defeated my Google-fu so far ...

I think the whole thing is just an artists impression...