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The final few letters of a look at aviation through the alphabet.
![](https://airlinepilotguy.com/wp-content/uploads/2021/04/Flettner_282_Modell_02-1024x768.jpg)
A model of the original Flettner 282 Helicopter
![](https://airlinepilotguy.com/wp-content/uploads/2021/04/PT-FLETTNER-2-1024x576.jpg)
Flettner helicopters have the unfortunate potential to decapitate the unwary!
![](https://airlinepilotguy.com/wp-content/uploads/2021/04/1920px-Britains_New_Spitfire_44-pf-116-2016-001-ac-1024x685.jpg)
A cutaway of the Spitfire with it’s remarkable Rolls Royce Merlin V12 engine.
![](https://airlinepilotguy.com/wp-content/uploads/2021/04/1920px-Allison_V-1710-7_V-12_Engine_NASM-1024x657.jpg)
The Allison V-1710 V12 engine
![](https://airlinepilotguy.com/wp-content/uploads/2021/04/Messerschmitt_Bf_109_G-6_MT-507_K-SIM_01-1024x675.jpg)
The Daimler-Benz DB600 V12.
![](https://airlinepilotguy.com/wp-content/uploads/2021/04/1920px-X-planes_group_photo-1024x799.jpg)
The X Planes
![](https://airlinepilotguy.com/wp-content/uploads/2021/04/SQ-RING.jpg)
The Napkin ring
Images under Creative Commons licence with thanks to Raobe001, Ball wallpaper, the National Archives UK, the Smithsonian archive, the USAF, NASA,