The Radial engine was once the pinnacle of internal combustion engine design, but has gone mostly extinct. What happened? The Radial first ousted the Rotary, then to a large extent the inline engines (V12's) before the Radial itself was ousted.
In this video we briefly go through the history of the radial and we also take a bit of a deep dive into radial engine design and see what made it such a great engine.
If you like this video you will love this one - WWII Aero V12 Engines Design Explained : [ Ссылка ]
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Chapters
0:00 The "Magic" of the Radial
0:21 Humble Beginnings
0:49 The Rotary Engine (Pros)
1:34 The Rotary Engine (Cons)
2:01 The Rise of the Air-cooled Radial
3:02 Basic Radial Engine Design
3:40 Radial Firing Order
4:03 Radial Firing Interval
4:59 Radial Crankshaft
6:17 Radial Valve Operation
6:36 Radial Primary Balance
7:04 Radial Secondary Balance
10:46 Radial Disadvantages
12:13 The Fall of the Radial Airplane Engine
14:03 Post-War Radial Applications
14:19 Modern Radials
Creative Commons attribution:
"Radial engine timing" animation by Stoianovici ([ Ссылка ]) license ([ Ссылка ]) zoom, cropped, arrows & text overlaid
"Radial engine large" animation by Duk ([ Ссылка ]) license ([ Ссылка ]) arrows & text overlaid
"4StrokeEngine Ortho 3D" by Zephyris ([ Ссылка ]) license ([ Ссылка ]) overlaid lines & arrows
Secondary unbalance force in a 7 cylinder radial by Pasimi ([ Ссылка ]) license ([ Ссылка ]) overlaid text
Boeing-Stearman E75 N5729N by Julian Herzog ([ Ссылка ]) no changes
Salmson 9Z by Duch.seb ([ Ссылка ]) overlaid text
Rotary engine animation by MichaelFrey ([ Ссылка ]) overlaid text & arrow
Rotary engine animation by MichaelFrey ([ Ссылка ]) increased spinning speed
Old Flywheel by Andrew Eaton ([ Ссылка ]) overlaid cross
Rolls-Royce Merlin by JAW ([ Ссылка ]) overlaid text
LeBlond 90-5F by Darkroom ([ Ссылка ]) no changes
BMW 132 (radial conrods) by Kogo ([ Ссылка ]) no changes
XK engine camshafts by HReuter ([ Ссылка ]) overlaid cross
Piston by S. Diddy ([ Ссылка ]) no changes
Crankshaft by Alex Kovach ([ Ссылка ]) no changes
Pleuel-Käfer (conrod) by Benutzer:Thomas Ihle ([ Ссылка ]) no changes
Crankshaft two stroke Engine by Werntec ([ Ссылка ]) no changes
Conrod4M5ms by Bryllig ([ Ссылка ]) stopped, paused
Elsbett-3cyl by Dan Wesson ([ Ссылка ]) no changes
Republic P-47 Thunderbolt by Eric Friedebach ([ Ссылка ]) zoom
F4U-5NL Corsair (NX43RW) by Alan Wilson ([ Ссылка ]) zoomed in slightly
F6F-5 Hellcat by David Merrett ([ Ссылка ]) no changes
Spitfire Mk XIV by David Merrett ([ Ссылка ]) no changes
BMW VI by W2k2 ([ Ссылка ]) no changes
"Biggest radial cutaway" by Phil Genera ([ Ссылка ]) zoomed in
Pratt & Whitney R-4360 at Kalamazoo Air Zoo by D. Miller ([ Ссылка ]) zoomed in, text overlaid
CL215 43 Grupo by Javiramos43 ([ Ссылка ]) no changes
Creative Commons video attribution:
Sopwith Camel fires up its engine by scribex ([ Ссылка ]), License CC-BY
Sopwith Camel Run Old Warden 22 September 2012 by Oldwardenman ([ Ссылка ]), License CC-BY
Sopwith Camel Run 2 Old Warden 22 September 2012 by Oldwardenman ([ Ссылка ]), License CC-BY
Gyroscopic precession demonstration by MITK12Videos ([ Ссылка ]), License CC-BY
Bombing Missions, 1944 220451-07 by footagefarm ([ Ссылка ]), License CC-BY
RAF Spitfires Taking Off by footagefarm ([ Ссылка ]), License CC-BY
B 17 b roll by Arizona Commemorative Air Force Museum ([ Ссылка ]), License CC-BY
Radial at National Air & Space Museum, Dulles by iros532 ([ Ссылка ]), License CC-BY
Cessna Aircraft Wings for Doubting Thomas ([ Ссылка ]), CC-BY
Whiskey 7 First start 2017 (C-47) by David Andruczyk ([ Ссылка ]), License CC-BY
