The Napier Sabre H24 powered the Hawker Typhoon and Tempest fighters. At first look, the engine may seem too complex to easily understand.
This video sorts that out, explaining the engine in a way that is easy to understand and will also give anyone a good basic understanding of how the engine works and why it was even designed that way in the first place.

Inline 6 Aero Engine Deep Dive (including balance)    • Why the Inline 6 Engine Disappeared F...  
The Rise & Fall of the Radial Aero Engine    • The Rise & Fall of the Radial Airplan...  

Follow me on Instagram:   / lets_go_aviate  

Chapters:
0:00 ICE Peak
1:05 The Scaling Problem
4:04 Crankshaft(s)
6:10 Connecting Rods
7:53 Sleeve Valves
12:41 Small Cylinders
15:34 Forced Induction
16:48 Size / Compactness
17:44 Disappearance

Copyrighted content credit (using with permission):
Thanks to the Smithsonian National Air and Space Museum for the use of the image at the opening seconds of the video and at 15:40 & 16:52. Visit https://airandspace.si.edu
Thanks to the Aircraft Engine Historical Society for the use of the Napier Sabre Engine Moving Animations at 0:16, 5:33, 8:52 & 12:52. Visit https://www.enginehistory.org/CAD/ind... for more engine animations
Thanks to the Napier Power Heritage Trust for the use of the images at 0:10, 0:38, 0:48 & 15:22. Visit npht.org
Thanks to mechtraveller.com for the video showing the closeup operation of sleeve valves at 8:41. Visit mechtraveller.com

Thumbnail attribution:
Napier Sabre IIIauthor Flickr user "tataquax" : https://www.flickr.com/photos/2545169... (https://creativecommons.org/licenses/...) removed background & colorgraded the photo
Image also used at 4:37

Creative Commons Video attribution in order:
0:27 F86 Sabre The Most Feared Fighter Plane in the world by Sonya L Terry (   • F86 Sabre  The Most Feared Fighter P...  ), license CCBY
1:05 Harry Hardy DFC Hawker Typhoon Pilot by The Damcasters The Aviation History Podcast (   • WW2 Hawker Typhoon Pilot Tells His Story  ), license CCBY
1:33 Gloster Meteor A Short History by A Short History (   • Gloster Meteor  A Short History  ), license CCBY
3:21 Inline 6 Cylinder animationauthor MichaelFrey (https://creativecommons.org/licenses/...) cropped side view & overlaid text
4:28 Animation of an HEngineauthor MichaelFrey (https://creativecommons.org/licenses/...) reversed direction of top crankshaft
7:37 SUBARU BOXER Engine by Need for Speed Racers (   • SUBARU BOXER Engine  ), license CCBY
8:25 Why is it important to understand top dead center vs. overlap on a 4stroke? by How 2 Wrench (   • Why is it important to understand top...  ), license CCBY
10:22 4StrokeEngine Animationauthor Zephyris (https://creativecommons.org/licenses/...) zoom+crop
18:10 Monster Race Engine Roars to Life in Tiny Bush Plane by Mike Patey (   • Monster Race Engine Roars to Life in ...  ), license CCBY

Creative Commons Image attribution in order:
MacchiCastoldi M.C.72 engine Fiat AS.6author Bergfalke2 (https://creativecommons.org/licenses/...) no changes
DaimlerBenz DB 604author Nimbus227 (https://creativecommons.org/licenses/...) no changes
Motore Isotta Fraschini Asso 750 (W18)author Alessandro Nassiri for Museo scienza e tecnologia Milano (https://creativecommons.org/licenses/...) cropped
JAGUAR 3L V6 Superchargedauthor Jaguar MENA (https://creativecommons.org/licenses/...) crop+zoom+overlaid arrows
Fork and blade connecting rodauthor Andy Dingley (https://creativecommons.org/licenses/...) overlaid arrows
Subaru Impreza WRX STI 2006 engineauthor Ric man (https://creativecommons.org/licenses/...) overlaid cross
RAF Museum Cosford MerlinAuthor Rept0n1x (https://creativecommons.org/licenses/...) crop+zoom+overlaid arrows
Bristol Perseus sleeve valve radial engineauthor Stahlkocher (https://creativecommons.org/licenses/...) crop&arrows overlaid
Sleeve Valve Closeupauthor Kitplane01 (https://creativecommons.org/licenses/...) crop+zoom
Napier Sabre Engineauthor Paul Maritz (paulmaz) (https://creativecommons.org/licenses/...) no changes
Hawker Fury with Napier Sabre VII Copyright NPHT
Napier Sabre IIIauthor Hugh Llewelyn (https://creativecommons.org/licenses/...) cropped+overlaid arrows
Hawker Typhoon Ib (composite airframe) ‘JP843 / Y / T’author Alan Wilson (https://creativecommons.org/licenses/...) crop+zoom+overlaid text
9 Zylinder Sternmotor(Vedenyev M14P)author Thomas Vogt (https://creativecommons.org/licenses/...) no changes