You would not want to stand next to the outer side of the nacelles for an extended period when the engines are running as the exhaust duct from the PT6C-67A faces downward toward the deck when in the upright helicopter mode (and face aft when the nacelles are in the airplane mode in flight). I asked one of the test pilots if you could safely walk under it on the deck and he said you can, but I have not tried it myself!