User:EthanGBB/sandbox

=Skyline Casing= Skyline casing refers to a covering on top of a locomotive of which aids in aerodynamics by reducing the drag produced by the fixtures on top of the engine. Many railroads attempted and failed to find it's usefulness.

=Types= Skyline casings are found on two types; Lifting and Shroud/Non-lifting.

Lifting
Lifting skyline casings use a scoop or other device to force air around and up from the top of the smokebox to lift the smoke from the engine. Most prolific example was on almost all of Southern Pacific's steam locos. The only surviving lifting skyline casing is on SP GS-4 4449.

Shroud
Shroud skyline casings do not have features to lift the smoke and are purely to improve aerodynamics. Most popular example, and a surviving one is N&W's 611.

=Examples=

Pennsylvania Railroad
Attempted on one of their K4's and their only Q1, albeit without any smoke lifting properties.

Atchison, Topeka & Santa Fe Railway
Attempted on 3461, smoke lifting proved fruitless Streamlining used on 3460 appears similar to skyline casing.

Norfolk & Western
Used on their J Class, no smoke lifting properties

New York Central Railroad
Their "Dreyfuss" streamlined Hudson's appear to have a type of skyline casing.

Southern Pacific
The earliest example of lifting skyline casing is on SP's GS-2's built by Lima. SP was quick to find it's use and installed similar skyline casings on all of their fast freight and passenger service locomotives. Most notably their Mt class and P classes. SP was the only one to be so prolific with their skyline casings.