Double heading

A double headed U.S. passenger train of the 1860s

A double headed steam excursion train in Iowa, September 2006

In railroad terminology, double heading indicates the use of two locomotives at the front of a train, each operated individually by its own crew. The practice of triple-heading involves the use of three locomotives.

Double heading is most common with steam locomotives, but is also practised with diesel locomotives. It is not strictly the same practice as two or more diesel or electric locomotives working 'in multiple' (or 'multiple-working'), where both (or all) locomotives are controlled by a single driver in the cab of the leading locomotive.

单词	Doubleheading
释义	Doubleheading 英语百科 Double heading In railroad terminology, double heading indicates the use of two locomotives at the front of a train, each operated individually by its own crew. The practice of triple-heading involves the use of three locomotives. Double heading is most common with steam locomotives, but is also practised with diesel locomotives. It is not strictly the same practice as two or more diesel or electric locomotives working 'in multiple' (or 'multiple-working'), where both (or all) locomotives are controlled by a single driver in the cab of the leading locomotive.
随便看	split order quantity split our sides split our sides with laugher split our sides with laughter split our vote split our votes split out split outer race bearing split outer race of the wound roller bearing split package contract split packoff split page Split pair split palatal bar split palatal strap split panel survey split papules split paraboloid split pastern split patella approach splitpath split pattern split pattern molding machine split pattern moulding machine Split Pea

Doubleheading

Double heading