This Design Quietly Solved the Big Problem with Radial Engines

Lets Go Aviate July 6, 2025
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Lets Go Aviate

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I'm an aviator sharing knowledge about everything in aviation I'm passionate about. I love diving into complex subjects, be it aerodynamics, pilot techniques, safety or powerplant subjects and breaking it up into understandable chunks, always explained with as little mathematics as possible. Welcome to the channel, let's explore general aviation together!

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The Zoche Aero-Diesel is almost a revival of the Packard DR-980, except Zoche actually got the Aero-diesel's design right. Not only that, they managed to make a radial engine small enough to compete with horizontally opposed engines. How did they accomplish that? Let's explore the fascinating design of the Zoche Aero-diesel. The Zoche patent: https://patents.google.com/patent/US5197416A/en Follow me on Instagram: https://www.instagram.com/lets_go_aviate/ Thumbnail attribution (engine photo) Zoche aero diesel-author Axel Hindemith (https://creativecommons.org/licenses/by-sa/3.0/de/legalcode) background removed IMAGE ATTRIBUTION Zoche image drawings source Zoche http://www.zoche.de/index.html Zoche aero diesel-author Axel Hindemith (https://creativecommons.org/licenses/by-sa/3.0/de/legalcode) image cropped & using zoom Packard Diesel DR-980-author Jim1138 (https://creativecommons.org/licenses/by-sa/4.0/deed.en) crop + zoom Rotax 916-author Matti Blume (https://creativecommons.org/licenses/by-sa/4.0/deed.en) background removed Rotax 915-author Matti Blume (https://creativecommons.org/licenses/by-sa/4.0/deed.en) background removed Car cooling system-author greenfire007 (https://creativecommons.org/licenses/by/3.0/) overlaid cross&text Rotec R3600-author FlugKerl2 (https://creativecommons.org/licenses/by-sa/3.0/deed.en) cropped Warner Revolution II-author Robert Frola (https://en.wikipedia.org/wiki/GNU_Free_Documentation_License) crop+zoom WWI replica with Rotec R3600-author Alan Wilson (https://creativecommons.org/licenses/by-sa/2.0/deed.en) crop+zoom Continental IO-520-author Stahlkocher (https://creativecommons.org/licenses/by-sa/3.0/deed.en) no changes Continental CD-300-source https://continental.aero/jeta-engines/ Zoche aero diesel-author Axel Hindemith (https://creativecommons.org/licenses/by-sa/3.0/de/legalcode) background removed, brightness adjusted Pratt & Whitney R-985-author Michael Hays from Seattle, USA (https://creativecommons.org/licenses/by/2.0/deed.en) no changes Continental W-670-author FlugKerl2 (https://creativecommons.org/licenses/by-sa/3.0/deed.en) background removed, text overlaid Vought F4U Corsair & P&W R2800-author Ken Hodge from Darwin, Australia (https://creativecommons.org/licenses/by/2.0/deed.en) crop+zoom+overlaid ext Fairchild C-119&Wright R3350-author Alan Wilson (https://creativecommons.org/licenses/by-sa/2.0/deed.en) crop+zoom+overlaid text BMW 132 9-cylinder Radial Engine, Master Connecting Rod and Articulated Rods-author Kogo (https://en.wikipedia.org/wiki/GNU_Free_Documentation_License) overlaid arrows+text Secondary unbalance force due to piston motion in a five-cylinder radial-engine-author Pasimi (https://creativecommons.org/licenses/by-sa/4.0/deed.en) no changes A gas fueling pump-author Tony Webster (https://creativecommons.org/licenses/by/2.0/deed.en) no changes VIDEO ATTRIBUTION Zoche aero-diesel running on wind tunnel test bench by Georg Zoche (https://youtu.be/CVMHlhjZ4aM) copyright Georg Zoche Radial engine at National Air & Space Museum, Dulles by iros532 (https://youtu.be/v704wzRp5pg), license CC-BY 5 cylinder Radial engine animation-author Duk (https://creativecommons.org/licenses/by-sa/3.0/) no changes Mercedes E-Class Coupe: New 4-cylinder Diesel engine Animation by Motor1 (https://youtu.be/48EllCCGxu8), License CC-BY HOW A DIESEL ENGINE WORKS by ASHTON'S VEHICLE MODS - AVM (https://youtu.be/FHiQvvDWasw), License CC-BY The REAL Effects of Diesel Gelling - What The Truck!? by Truck Center Companies (https://youtu.be/YyF8hgeKG2k), license CC-BY I teach you how to adjust valves using my own diesel engines! by Danie Simpson (https://youtu.be/9HkSK6AWvcY), license CC-BY Chapters: 0:00 The Zoche Aero-diesel 0:13 The Fall of the Oil Burner 2:40 Rise of the Phoenix 4:48 Zoche Aero-diesel Spces 7:42 Design - Cylinder Count & Firing 10:54 Design - Size 14:13 Design - Intake & Exhaust 16:22 Design - Lubrication 17:31 Design - Balance 22:29 Cold Starts and Freezing Fuel 23:41 The Advantage

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