I've heard of several folks planning single-turbine models of twin-centerline thrust airplanes (e.g. F-15, F-18) by aligning the turbine with one outlet and using a traditional single pipe.

Apparently the asymmetry in yaw is small and almost not noticable. An Air Force test pilot friend who has done a lot of engine-out work in similarly configured full-scale AF planes says you don't even need to step on the rudder.

You'd just plan the equipment install to laterally balance and it should work. Would make smaller planes like the ones discussed here more viable.

Dave