Photo © Bob Garrard
Seeing this picture I wondered why this DC-9-15 has two emergency "over the wing exits" on each side. (I suppose the opposite side has also two).
I know that the six DC-9-15 operated by KLM had only one over the wing exit on each side as seen on this pic.
Photo © Paul K
Does it has to do with the fact that the CO aircraft is a RC variant? Or does it has something to do as we see nowadays with the Airbus A319 which at some carriers has a HD configuration and therfore needs extra over the wing exits as well?
As seen in these two pictures
Photo © Michael Walter
Photo © Nikos Fazos
compared with these
Photo © Turker Hasimoglu
Photo © Jason Whitebird
Sorry if this has been discussed before already, but a search in the forum did not gave me any hits.