It appears that both while Boeing and Airbus are looking at "open rotor technology:, they are moving in different directions (paid subscription required), with Boeing focusing on an on-wing tractor propeller, and Airbus looking at a fuselage mounted pusher propeller. (shown)Seeing as how air flows the same way on both sides of the Atlantic, the questions is what the differences are in their requirements.
Based on my rather uneducated gut, my guess is that a pusher system, at least one with a the tails arranged as shown would be quieter, because the tail structure masks the prop noise to a degree, and that the tractor propeller on the wing would be more efficient, because the it would be in less turbulent air.
Additionally, the airflow over the wing from the puller props might marginally improve short field performance.
Any thoughts?
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