A taste of that can be seen in the photo we have here, taken at the end of March at Joint Base Elmendorf-Richardson in Alaska, and recently made public by the USAF.
The Globemaster, assigned to Joint Base Lewis-McChord in Washington, was on the runway, ready to partake in Exercise Rainier War 22A. The crew who operates it cold-started the engines, generating the impressive amount of white smoke billowing out the back.
The plane is part of the same unit we talked about last week, the 62nd Airlift Wing, which was present in Alaska to demonstrate its ability to “operate and survive while defeating challenges to the U.S. military advantage in all operating domains – air, land, sea and cyberspace.”
As for what a cold start is for an airplane engine, that means turning it on after a long period of inactivity, but also when the temperature outside is below 20 degrees Fahrenheit (minus 6.6 degrees Celsius). Generally, bringing the engines to optimum operating temperature requires an increase in power in stages, which on average, and for a regular-sized airliner, can take up to 15 minutes.