After seeing the great pics of the AB139 on the Rotorheads around the World thread - could someone answer me this question.
I note that each PT6 is mounted with the power turbine section facing forward towards the transmission. Therefore the gas producer section aft driving the accessory gearbox.
My question is - how do they duct the exhaust gases? I assume that the exhausts run in between the two mounted engines and then ported out to the exhausts at the rear. Am I right or did I have my computer turned upside down when I was looking at the photos?