Summary: The final few letters of a look at aviation through the alphabet.<br> <br> <br> <br> A model of the original Flettner 282 Helicopter<br> <br> <br> <br> Flettner helicopters have the unfortunate potential to decapitate the unwary!<br> <br> <br> <br> A cutaway of the Spitfire with it's remarkable Rolls Royce Merlin V12 engine.<br> <br> <br> <br> The Allison V-1710 V12 engine<br> <br> <br> <br> The Daimler-Benz DB600 V12.<br> <br> <br> <br> The X Planes<br> <br> <br> <br> The Napkin ring<br> <br> <br> <br> Images under Creative Commons licence with thanks to Raobe001, Ball wallpaper, the National Archives UK, the Smithsonian archive, the USAF, NASA,
