Originally Posted by YVR Cockroach
This has been tried before. Not saying it won't ever work but Pratt & Whitney was designing this type of engine for the Airbus A340. Basically, P&W's prototype was a dismal failure and the A340 had to be (under)powered using 737-type engines (IAE V2500/CFM56s).
CFM56-5C engines for the A340-200/200.
The technology and research has advanced substantially since the late 80s/early 90s.