Flat-sixteen engine

Porsche experimental Can-Am engine

A flat-16 is an internal combustion engine in flat configuration, having 16 cylinders.

There are few examples.

The British engine manufacturing company Coventry Climax developed a racing flat-16 unit, the FWMW, in the 1960s, towards the end of the 1.5 litre Formula One. The Brabham and Lotus teams designed cars for this engine but it was never raced because of the continuing success of the previous engine, the FWMV V8.

Porsche ran some tests with a dual-spark flat-16 Can-Am version of the 917 but it too was never raced, as turbocharging the existing flat-12 produced the required power.

Reciprocating engines and configurations

Type

Stroke cycles

Configurations
& number of cylinders

Single cylinder	Single

Two cylinders	Split-single I2 V2 F2

Inline / straight	I2 I3 I4 I5 I6 I7 I8 I9 I10 I12 I14

Flat	F2 F4 F6 F8 F10 F12 F16

V / Vee	V2 V3 V4 V5 V6 V8 V10 V12 V14 V16 V18 V20 V24

W	W8 W12 W16 W18

Other inline	H U Square four VR Opposed X Junkers Jumo 222

Components

Valves	Cylinder head porting Corliss Intake Exhaust Multi Overhead Piston Poppet Side Sleeve Slide Rotary valve Variable valve timing Camless Desmodromic

Fuel supplies	Carburetor Gasoline direct injection Common rail

Mechanisms	Cam Camshaft Overhead camshaft Connecting rod Crank Crankshaft Scotch yoke Swashplate Rhombic drive

Linkages	Peaucellier–Lipkin Watt's (parallel)

Other	Hemi Recuperator Turbo-compounding

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