Re: 747 with engines on the wings?

Date:         19 Feb 98 01:33:58 
From:         "You don't really need to know that" <GuessWho@Nowhere.com>
Organization: None at all really
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Lion's Pers Agentschap wrote:
>  What is the reason that airliners have engines under the wing instead
> of on it?

Because airflow over the wing is what produces lift to allow the plane to
fly. Putting the engines over the wing would produce enormous
disturbances to the airflow over the wing. Is it any coincidence that the
VFW-614 didn't make it into large scale production? The Antonov and
Boeing YC-14 are a different concept altogether as they are designed to
utilise Upper Surface Blowing (USB) to produce extra lift by deflecting
the jetblast downwards as it leaves the wings upper surface. Even with
the engines mounted under the wing you will often see wing fences mounted
on the engine nacelles to straighten out the airflow over the wings upper
surface.

Trevor Fenn
trevfenn@erols.com