Why the Inline 6 Engine Disappeared From Aviation - History & Technical

We briefly cover the history of the inline 6 engine in aviation and then go over technical information to determine it's suitability for light aircraft,
attempting to uncover the reason for it's disappearance from modern aviation.

Chapters:
0:00 - Inline 6 Legacy
0:22 - The Race for More Horsepower (Early WWI)
1:33 - End of the Road for the Rotary
2:17 - The Rise of the Inline Engines
3:08 - New Kid on the Block (BMW IIIa)
4:06 - Inline 6 Setting Performance Records
4:53 - Inline 6 Advantages
5:55 - Inline 6 Primary Balance
7:34 - Inline 6 Secondary Balance
10:11 - Firing Interval
10:28 - Why the Inline 6 is Superior
10:48 - Inline 6 Disadvantages
11:44 - The Disappearance of the Inline 6 in WWII
12:31 - The Inline 6 in Modern Aviation

Image attribution:
BMW M3 engine-author Michael Price (https://creativecommons.org/licenses/...) cropped, face overlaid
Fast and the Furious inline 6-author Poudou99 (https://creativecommons.org/licenses/...) cropped, face overlaid
Mercedes D.II author-Franco Atirador (https://creativecommons.org/licenses/...) no changes
Mercedes D.III (two photos) author Zenwort (https://creativecommons.org/licenses/...) no changes
D.IIIa on Fokker D.VII-author Kogo (https://creativecommons.org/licenses/...) cropped & text caption overlaid
BMW IIIa-author Chris and Kelly (https://creativecommons.org/licenses/...) no changes
BMW IIIa cutaway-author Piotr Witkowski (https://creativecommons.org/licenses/...) no changes
Fokker D.VII-author Julian Herzog (https://creativecommons.org/licenses/...) cropped + zoom
BMW IV author-Stahlkocher (https://creativecommons.org/licenses/...) no changes
Siddeley-Puma MilMusBuc-author Zenwort (https://creativecommons.org/licenses/...) arrow overlaid, cropped
DH.88 Comet-author Woldere (https://creativecommons.org/licenses/...) text caption overlaid + zoom
De Havilland DH.89 Dragon Rapide-author Falcon® Photography (https://creativecommons.org/licenses/...) zoom & cropped
Brown B-2-author SDASM Archives (https://creativecommons.org/licenses/...) text caption overlaid
Zlin142 Rob Harrison "The Tumbling Bear"-author Tomás Del Coro (https://creativecommons.org/licenses/...) zoom + crop & text caption overlaid
Zlin Z-126 Letecké muzeum-author Palickap (https://creativecommons.org/licenses/...) cropped & text caption overlaid
Replica Sopwith Camel uncovered-author Alan Wilson (https://creativecommons.org/licenses/...) cropped + zoom
Austro Engine AE500-author Waerfelu (https://creativecommons.org/licenses/...) no changes
Titan T-51 Mustang-author Bidgee (https://creativecommons.org/licenses/...) no changes
AeroVolga LA-8-author Aleksandr Markin (https://creativecommons.org/licenses/...) no changes
Zlín Z-42-author bomberpilot (https://creativecommons.org/licenses/...) cropped & text caption overlaid
Zlin43-author Aleksandr Markin (https://creativecommons.org/licenses/...) no changes
Zlin Z-526 Trener-author Mike Burdett (https://creativecommons.org/licenses/...) cropped
Mercedes D.II-author Aconcagua (https://creativecommons.org/licenses/...) cropped
Fokker D.VII with Hispano-Suiza 8F & Daimler D.III-author Valder137 (https://creativecommons.org/licenses/...) cropped + pan & zoom
Walter M-337-author Ltosnar (https://creativecommons.org/licenses/...) no changes

Video attribution:
Inline 6 Cylinder animation-author MichaelFrey (https://creativecommons.org/licenses/...) freeze frame + cropped
4stroke animation-author Zephyris (https://creativecommons.org/licenses/...) freeze frame + overlaid arrows
Inline 4 Cylinder animation-author MichaelFrey (https://creativecommons.org/licenses/...) cropped + overlaid arrows
Fokker DVII Mercedes run up at Antique Aero by Gregory Rydquist (   • Fokker DVII Mercedes run up at Antique Aer...  ), License CC-BY
Fighter Pilot | Training | WW1 by BlackBearSix.TV (   • Fighter Pilot | Training | WW1  ), License CC-BY
WWI - Fighter Planes by Loch of Shining Waters (   • WWI - Fighter Planes - Archive Footage  ), License CC-BY
TVAL WWI aircraft display at Wings over Wairarapa 2021 by Lspace (   • TVAL WWI aircraft display at Wings over Wa...  ), License CC-BY
Sopwith Camel Run Old Warden by Oldwardenman (   • Sopwith Camel Run 2 Old Warden 22 Septembe...  ), License CC-BY
Spinning Bike Wheel and Conservation of Angular Momentum by MITK12Videos (   • MIT Physics: Spinning Bike Wheel and Conse...  ), License CC-BY
Spitfire Recognition| US Air Force Instructional Film (1944) by Armoured Archivist (   • Write Like A Winner | Write Your Best Work...  ) License CC-BY
Sopwith Camel fires up its engine by Scribex (   • Sopwith Camel fires up its engine  ) License CC-BY
Junkers Filmdokumente by Hugo Junkers (   • Junkers Filmdokumente - F13 und G24 auf de...   and    • Junkers Filmdokumente - Ein seltener Flugr...  ) License CC-BY