| Pennsylvania Railroad D5 | |
| Powertype: | Steam |
| Builder: | PRR Altoona shops |
| Builddate: | 1870–1873 |
| Totalproduction: | 18 |
| Whytetype: | 4-4-0 |
| Uicclass: | 2′B |
| Leadingdiameter: | 260NaN0[1] |
| Driverdiameter: | 560NaN0 |
| Wheelbase: | 19feet (locomotive); 40feet (with tender) |
| Length: | 49feet (locomotive and tender) |
| Width: | 8feet (cab roof) |
| Height: | 14inchesft8inchesin (ftin) (rail to top of stack) |
| Weightondrivers: | 408001NaN1 |
| Locoweight: | 652001NaN1 |
| Tenderweight: | 408001NaN1 |
| Locotenderweight: | 1060001NaN1 |
| Fuelcap: | 65001NaN1 |
| Watercap: | 1600usgal |
The Pennsylvania Railroad's steam locomotive class D5 (formerly Class G, pre-1895) comprised eighteen lightweight 4-4-0 locomotives for light duty, maintenance-of-way and branch-line service, constructed at the railroad's own Altoona Works (now owned by Norfolk Southern) during 1870–1873.[2]
They shared many parts with other standard classes, although less so with the heavy 4-4-0s on account of their lighter build; instead, they shared some components with 0-6-0 switcher classes F and H (later B1 and B2).[3] The Class G locomotives had a straight-topped boiler, unlike the wagon-top of the other 4-4-0 classes.
