BANDOB posted:Here's 17 on the Norfolk Southern coming into Enola Yard, PA in June 21011.
To be fair, these are all locomotives, so may not "count" as a train with a multiple unit consist.
I live in the S.W. KC area and have seen a few of these 'all engine' trains with 15-20 or maybe even more engines, all BNSF (BNSF tracks). However, as you say I think they were probably just being moved and would not count as a MU/LU actual train. They were headed toward the Argentine yard. BNSF now has their new intermodal yard in Edgerton, KS and I see these between the Edgerton and Argentine yards. Probably more reason to be moving engines around?
Other than those I believe 4-5 or so is about all I have ever seen MU'd on the front of an actual train around here. They sometimes would have another couple of engines on the rear and sometimes even a couple in the middle. The ones in the middle are pretty rare around here though, at least I haven't seen very many of them anyway.
And BTW, the picture is not showing in your 17 NS engine post. Also I am not very knowledgeable on the real rail roads.