Air Wisconsin de Havilland Canada DHC-7  N791S            (c/n  011)

                                 

                                      Air Wisconsin were one of the lead customers for this larger, basically four engined version of
                                      the Twin Otter.   N791S, seen above in this photo by Bob Garrard at a snowy/slushy O'Hare
                                      in March of 1981, was the first, and was delivered in January of 1980.   Eventually the airline
                                      would go on to use operate ten Dash-7s as the model was popularly known, and as such, had
                                     one of the largest fleets of them.   Only 100 civil models were built.