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/by/2.0/deed.en) cropped, face overlaid Fast and the Furious inline 6-author Poudou99 (https://creativecommons.org/licenses/by/4.0/deed.en) cropped, face overlaid Mercedes D.II author-Franco Atirador (https://creativecommons.org/licenses/by-sa/3.0/deed.en) no changes Mercedes D.III (two photos) author Zenwort (https://creativecommons.org/licenses/by-sa/4.0/) no changes D.IIIa on Fokker D.VII-author Kogo (https://creativecommons.org/licenses/by-sa/2.0/deed.en) cropped & text caption overlaid BMW IIIa-author Chris and Kelly (https://creativecommons.org/licenses/by-sa/2.0/deed.en) no changes BMW IIIa cutaway-author Piotr Witkowski (https://creativecommons.org/licenses/by/3.0/deed.en) no changes Fokker D.VII-author Julian Herzog (https://creativecommons.org/licenses/by/4.0/deed.en) cropped + zoom BMW IV author-Stahlkocher (https://creativecommons.org/licenses/by-sa/3.0/deed.en) no changes Siddeley-Puma MilMusBuc-author Zenwort (https://creativecommons.org/licenses/by/4.0/deed.en) arrow overlaid, cropped DH.88 Comet-author Woldere (https://creativecommons.org/licenses/by/4.0/deed.en) text caption overlaid + zoom De Havilland DH.89 Dragon Rapide-author Falcon® Photography (https://creativecommons.org/licenses/by-sa/2.0/deed.en) zoom & cropped Brown B-2-author SDASM Archives (https://creativecommons.org/licenses/by-sa/4.0/) text caption overlaid Zlin142 Rob Harrison "The Tumbling Bear"-author Tomás Del Coro (https://creativecommons.org/licenses/by-sa/2.0/deed.en) zoom + crop & text caption overlaid Zlin Z-126 Letecké muzeum-author Palickap (https://creativecommons.org/licenses/by/4.0/deed.en) cropped & text caption overlaid Replica Sopwith Camel uncovered-author Alan Wilson (https://creativecommons.org/licenses/by-sa/2.0/deed.en) cropped + zoom Austro Engine AE500-author Waerfelu (https://creativecommons.org/licenses/by/3.0/deed.en) no changes Titan T-51 Mustang-author Bidgee (https://creativecommons.org/licenses/by-sa/3.0/au/deed.en) no changes AeroVolga LA-8-author Aleksandr Markin (https://creativecommons.org/licenses/by-sa/2.0/deed.en) no changes Zlín Z-42-author bomberpilot (https://creativecommons.org/licenses/by-sa/2.0/deed.en) cropped & text caption overlaid Zlin43-author Aleksandr Markin (https://creativecommons.org/licenses/by-sa/2.0/deed.en) no changes Zlin Z-526 Trener-author Mike Burdett (https://creativecommons.org/licenses/by-sa/2.0/deed.en) cropped Mercedes D.II-author Aconcagua (https://creativecommons.org/licenses/by-sa/3.0/deed.en) cropped Fokker D.VII with Hispano-Suiza 8F & Daimler D.III-author Valder137 (https://creativecommons.org/licenses/by/2.0/deed.en) cropped + pan & zoom Walter M-337-author Ltosnar (https://creativecommons.org/licenses/by/4.0/deed.en) no changes Video attribution: Inline 6 Cylinder animation-author MichaelFrey (https://creativecommons.org/licenses/by/4.0/deed.en) freeze frame + cropped 4stroke animation-author Zephyris (https://creativecommons.org/licenses/by-sa/3.0/deed.en) freeze frame + overlaid arrows Inline 4 Cylinder animation-author MichaelFrey (https://creativecommons.org/licenses/by-sa/3.0/deed.en) cropped + overlaid arrows Fokker DVII Mercedes run up at Antique Aero by Gregory Rydquist (https://youtu.be/6i7FMZUNCec), License CC-BY Fighter Pilot | Training | WW1 by BlackBearSix.TV (https://youtu.be/hDFR5-ZTT-k), License CC-BY WWI - Fighter Planes by Loch of Shining Waters (https://youtu.be/_J9qIJ2UPic), License CC-BY TVAL WWI aircraft display at Wings over Wairarapa 2021 by Lspace (https://youtu.be/fbD9azQSMSo), License CC-BY Sopwith Camel Run Old Warden by Oldwardenman (https://youtu.be/knfADySOEL0), License CC-BY Spinning Bike Wheel and Conservation of Angular Momentum by MITK12Videos (https://youtu.be/iaauRiRX4do), License CC-BY Spitfire Recognition| US Air Force Instructional Film (1944) by Armoured Archivist (https://youtu.be/udaihhReGAA) License CC-BY Sopwith Camel fires up its engine by Scribex (https://youtu.be/vx8SgJTQh34) License CC-BY Junkers Filmdokumente by Hugo Junkers (https://youtu.be/GV1Tj2zyPTI and https://youtu.be/ALQvEqtNvKQ) License CC-BY