Reading level:

Caproni Ca.3

Caproni · Fighter · Italy · Pioneer Age (pre-1919)

Caproni Ca.3 — Fighter
Open in interactive gallery →

The Caproni Ca.3 (also Ca.36) was an Italian three-engine heavy bomber of WWI — one of the most-large long-range bombers of WWI + the foundational aircraft of Italian long-range-bombing doctrine. Gianni Caproni designed the Ca.3 in 1916; the prototype first flew in early 1917. About 269 Ca.3s were built between 1917 and 1920 at Caproni Taliedo. The aircraft served Italian Corpo Aeronautico Militare + French Aviation Militaire + American Air Service in late-WWI bombing operations.

The Ca.3 used 3 × Isotta Fraschini V.4B 6-cylinder engines (150 hp each). Maximum speed 137 km/h, range 600 km, service ceiling 4,000 m. Armament: 2-4 × Revelli machine guns + 450 kg of bombs internal + external. Crew: 4. The aircraft used a distinctive twin-tail-boom layout with a central nacelle + two tail booms + biplane wings of ~22 m wingspan. Two engines were mounted in the front of the tail booms (tractor) + one in the rear of the central nacelle (pusher) — an unusual configuration that maximised the bomber's stable flight envelope.

Ca.3 service was extensive in WWI Italian Front operations + late-war American Air Service long-range-bombing training. The aircraft attacked Austro-Hungarian targets in Trieste, Pula, Trento, and Innsbruck throughout 1917-1918. Caproni Ca.3s were also used by the American Air Service for late-war + postwar training of U.S. long-range-bomber crews — including Billy Mitchell (later proponent of American long-range-bombing doctrine) who flew the Ca.3 personally + adopted Italian Caproni design philosophy. About 1 Ca.3 airframe survives at the Italian Air Force Museum.

For Kids — a shorter, friendlier version

The Caproni Ca.3 was a big Italian bomber plane from World War One. A man named Gianni Caproni designed it in 1916. The first one flew in early 1917. About 269 of these planes were built between 1917 and 1920.

The Ca.3 had three engines. Two engines sat at the front of two long tail booms. One engine pushed from the back of the middle section. This odd layout helped the plane fly in a very steady way.

The plane had a wide set of wings. The wingspan was about 22 meters — longer than a city bus! It could carry a crew of four people. It also carried machine guns and a heavy load of bombs.

The Ca.3 flew for Italy, France, and America during the war. It was used to attack enemy targets far away. It was one of the biggest long-range bombers of World War One.

This plane was very important to the history of air power. It helped shape the idea of using bombers to strike targets from long distances. Even American leaders studied the Ca.3 to learn new ways to use bombers.

Fun Facts

  • The Ca.3 had three engines — two pulling from the front and one pushing from the back!
  • Its wingspan was longer than a city bus at about 22 meters wide.
  • About 269 Ca.3 planes were built between 1917 and 1920.
  • A crew of four people flew and fought from inside this big bomber.
  • The Ca.3 could fly as far as 600 kilometers on a single mission.
  • Italy, France, and America all used the Ca.3 during World War One.
  • The Ca.3 could climb as high as 4,000 meters — taller than many mountains in Europe!
  • American air leaders studied the Ca.3 and used its ideas to build their own bombing plans.

Kids’ Questions

How many engines did the Ca.3 have?

The Ca.3 had three engines. Two engines were at the front of the tail booms. One engine was at the back of the middle part of the plane. This made it look very different from most planes!

Who used the Ca.3 in the war?

Three countries used the Ca.3. Italy used it the most to bomb enemy targets. France and America also flew it near the end of World War One.

What made the Ca.3 special?

The Ca.3 was one of the biggest long-range bombers of World War One. Its unusual three-engine design helped it fly in a very steady way. It also helped leaders come up with new ideas about how bombers could be used in war.

Variants

Ca.3 / Ca.36 (basic)
Standard production. About 269 built.

Notable Operators

Italian Corpo Aeronautico Militare (1917-1920)
Principal user. Italian Front long-range bombing of Austro-Hungarian targets.
French Aviation Militaire (1918)
About 20 Ca.3s in French service.
American Air Service (1918-1920)
Late-war + postwar training of American long-range-bomber crews including Billy Mitchell.

Frequently Asked Questions

Why is the Caproni Ca.3 a 3-engine design?

Caproni's engineering philosophy preferred multiple-engine layouts for long-range bombers — multiple engines gave better range + payload + single-engine-out reliability than single-engine heavy bombers. The 3-engine layout (2 tractor on tail booms + 1 pusher on central nacelle) was unusual but stable + reliable. Caproni's subsequent Ca.4 + Ca.5 heavy bombers used 3-engine layouts that improved on the Ca.3 design.

Did Billy Mitchell fly the Ca.3?

Yes. American Air Service General Billy Mitchell flew the Caproni Ca.3 personally + studied Italian long-range-bombing doctrine during 1917-1919. Mitchell's subsequent advocacy for American long-range-bombing role — including his famous 1921 sinking demonstration of obsolete battleships from the air, and his court-martial after public criticism of U.S. military aviation policy — drew heavily from Italian Caproni doctrine. American long-range-bombing doctrine (B-17, B-24, B-29) traces conceptual lineage through Mitchell back to Caproni.

Sources

See Also