I haven't posted here in a while because I did not have any front end photos. So I took some of a few of my PRR K4s engines.
Original K4s engines were built between 1914-28, 425 total.
In 1936 the PRR, trying to compete with the NYC's streamlined engines, applied a full sheet metal shroud to one K4s engine which became the Torpedo.
In 1940, the PRR applied a partial shroud to four K4s engines and these were referred to as the Streamlined K4s. Some considered these as more visually appealing than the Torpedo.
The K4s and Torpedo are Weaver engines that are upgraded with ERR and Gunrunnerjohn's chuff and smoke goodies installed by forum member Alex_M. I just picked these up at York and hope to have videos soon of them double-headed pulling a heavy weight passenger train.
The K4s Streamline engine is a Williams model upgraded many years ago with PS-2.
