> In the P51 Mustang, WEP increased the horsepower by 61%.

In his youth, my late dad flew P51 Mustangs in the Korean War. He told the story of how he and another guy were flying a photo reconnaissance mission (I think it was) when the other guy was shot down by ground fire, crashing not far in front of Chinese lines. My dad then shot it out with the Chinese ground troops, hoping to keep them away from his downed colleague until help arrived. Back at the base, my dad's best friend mistakenly heard that it was my dad who'd been shot down; as my dad described it, his friend climbed into another P51 and flew all the way across Korea at "full military power" (the term he used) to get in the fight.

My dad's shot-down colleague was killed in the crash, it turned out. I vividly remember my dad telling the story late in his life and getting pretty emotional: He was certain that, in trying to protect his colleague, he had killed scores of young men who had little choice about being there, who probably were just farm boys like him and had parents and maybe wives and children at home. I don't think he ever got over that.

I have heard that the air force bought backup generators to power field installations for ground controllers, etc. These backup generators had a maximum continuous operation time, after which they would shut themselves off. The air force required an override button, so that they could be run longer, even if it meant the generator would destroy itself. If it's powering ground control, and it's the critical moment of the battle, and you can get ten more minutes power but then the generator breaks, you take the ten minutes and let the generator die. And you have to have the ability to do that if you need to.