Felidae 36 Posted August 26, 2017 Share Posted August 26, 2017 Hi, in AOM PART 1, page 1-1-33, Geometry Alexander Metzger writes: Loading the aircraft properly is therefore vital for sufficient control of the elevator which has less of an arm for pitch control than on a classical arrangement. Could anybody explain to me what is the what is actually the meaning of this snippet ( violet )and its technical background? Thanks Felidae Link to comment Share on other sites More sharing options...
Nexus82 21 Posted August 26, 2017 Share Posted August 26, 2017 Hello. Probably he means that because the CRJ has aft mounted engines, the wings need to be further aft aswell. So the distance between the elevator and CoG ( moment arm) is shorter than compared to wing mounted airliners. An empty aircraft with aft-mounteed engines is therefore tail heavy at low weights, and you don't want to further increase this scenario by loading cargo only in the aft cargo holds. This can render the elevators unable to recover the situation This is in general terms, maybe the CRJ is little different, I am no expert PS: a nice side effect with T-tails is that you increase the distance between CoG and the elevators Link to comment Share on other sites More sharing options...
Felidae 36 Posted August 27, 2017 Author Share Posted August 27, 2017 Thanks @ Nexus 82. Your explanations are actually interesting and bring some light to the question. Felidae PS Sorry for the typos. Editing had no effect! Link to comment Share on other sites More sharing options...
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