Isotta Fraschini V.4

The Isotta Fraschini V.4 of 1916 was an Italian six-cylinder, water-cooled, in-line piston aero engine of World War I (the "V" denoted "Volo" or "flight"). Its construction was fairly typical of aircraft engines of the period with six cast-iron cylinders mounted in pairs with common heads. This engine was also produced by Alfa Romeo.

Applications

 * CANT 7
 * Caproni Ca.3
 * Caproni Ca.30
 * Caproni Ca.33
 * Caproni Ca.34
 * Caproni Ca.35
 * Caproni Ca.36
 * FBA Type H
 * Macchi L.1
 * Macchi M.5
 * Macchi M.6
 * Macchi M.8
 * SIAI S.8

Variants

 * V.4:
 * V.4A:
 * V.4B:
 * V.4Bb:

Engines on display

 * A V.4b is on display in the Gianni Caproni Museum of Aeronautics.
 * The Caproni Ca.36 on display in the National Museum of the United States Air Force is fitted with a V.4b engine.
 * A V.4b is on display in the Polish Aviation Museum.