I at first was thinking the Shinden, but then I read it again and noticed 'nacelles' meaning wing mounted engines, plural. Then remembered the greenhouses on the front of the Airacudas nacelles that house a gunner and gun each.
Ok, on to the next question:
What was the MAIN contributing factor in the meager sales of the Lockheed L-1011 Tri-Star? It was a very reliable, well liked, and easy to maintain airliner, however because of this one thing, made sales not go as planned.
Hope that is enough, good luck!
Cheers, Lt. Cmdr. Richie
"To be prepared for war, is one of the most effectual means of preserving the peace."-George Washington