On this episode of Lessons from the Cockpit; Airplane designers analyze three elements for creating an airplane: Range, Payload, and Endurance. All three of these elements are affected by the aircraft engine. Two world-famous engines almost didn't make it into their iconic airframes. There were numerous obstacles business and engineering leaders overcame. One engine was within two weeks of cancellation. But companies took the high-risk road and it paid off in billions of dollars. Both of these engines changed the way the two planes operated, stretching the range, increasing the payload, and lengthening the endurance of these two famous planes.  Special thanks to the book Tanker Pilot and Wall Pilot for sponsoring this episode of Lessons from the Cockpit. P-51 and Spitfire graphics for the walls of your home or office can be purchased at www.wallpilot.com.   https://wallpilot.com/product/supermarine-mk1-spitfire/ https://wallpilot.com/product/george-preddy-p-51d-cripes-a-mighty-iii/ All episodes of Lesson from the Cockpit can be found on my website, https://markhasara.com/ Thanks for listening and please share with family and friends.