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The Caudron C.99 was a French
light bomber A light bomber is a relatively small and fast type of Military aircraft, military bomber Fixed-wing aircraft, aircraft that was primarily employed before the 1950s. Such Fixed-wing aircraft, aircraft would typically not carry more than one ton ...
and reconnaissance aircraft. The only example flew with different engines in the mid-1920s.


Design and development

Though in 1924 ''Flight'' described the C.99, which was on display at the 18th Paris Salon, as a fighter, both contemporary and modern French sources term it an observation and long range reconnaissance aircraft. It was a conventional single engine
tractor A tractor is an engineering vehicle specifically designed to deliver a high tractive effort (or torque) at slow speeds, for the purposes of hauling a trailer or machinery such as that used in agriculture, mining or construction. Most comm ...
biplane A biplane is a fixed-wing aircraft with two main wings stacked one above the other. The first powered, controlled aeroplane to fly, the Wright Flyer, used a biplane wing arrangement, as did many aircraft in the early years of aviation. While ...
with two open cockpits in
tandem Tandem, or in tandem, is an arrangement in which a team of machines, animals or people are lined up one behind another, all facing in the same direction. The original use of the term in English was in ''tandem harness'', which is used for two ...
. Its unequal span wings were rectangular in plan and were mounted without stagger, divided into two
bays A bay is a recessed, coastal body of water that directly connects to a larger main body of water, such as an ocean, a lake, or another bay. A large bay is usually called a gulf, sea, sound, or bight. A cove is a small, circular bay with a na ...
on each side by two pairs of parallel
interplane strut In aeronautics, bracing comprises additional structural members which stiffen the functional airframe to give it rigidity and strength under load. Bracing may be applied both internally and externally, and may take the form of strut, which act in ...
s.
Cabane strut In aeronautics, bracing comprises additional structural members which stiffen the functional airframe to give it rigidity and strength under load. Bracing may be applied both internally and externally, and may take the form of strut, which act in ...
s supported the upper wing over the
fuselage The fuselage (; from the French ''fuselé'' "spindle-shaped") is an aircraft's main body section. It holds crew, passengers, or cargo. In single-engine aircraft, it will usually contain an engine as well, although in some amphibious aircraft t ...
. The C.99 had a steel frame engine mounting in the nose, designed to accept a variety of engines. At the 1924 Salon it had a
Hispano-Suiza 12H Hispano-Suiza () is a Spanish automotive–engineering company. It was founded in 1904 by Marc Birkigt and Damian Mateu as an automobile manufacturer and eventually had several factories in Spain and France that produced luxury cars, aircraft en ...
water cooled
V-12 engine A V12 engine is a twelve- cylinder piston engine where two banks of six cylinders are arranged in a V configuration around a common crankshaft. V12 engines are more common than V10 engines. However, they are less common than V8 engines. The fi ...
but it was also seen with a water cooled
Fiat Fiat Automobiles S.p.A. (, , ; originally FIAT, it, Fabbrica Italiana Automobili di Torino, lit=Italian Automobiles Factory of Turin) is an Italian automobile manufacturer, formerly part of Fiat Chrysler Automobiles, and since 2021 a subsidiary ...
engine and a
Lorraine-Dietrich Lorraine-Dietrich was a French automobile and aircraft engine manufacturer from 1896 until 1935, created when railway locomotive manufacturer ''Société Lorraine des Anciens Etablissements de Dietrich et Cie de Lunéville'' (known as ''De Dietri ...
was another possibility. The forward seat was just behind the wing
trailing edge The trailing edge of an aerodynamic surface such as a wing is its rear edge, where the airflow separated by the leading edge meets.Crane, Dale: ''Dictionary of Aeronautical Terms, third edition'', page 521. Aviation Supplies & Academics, 199 ...
and the second close behind. There was a triangular
fin A fin is a thin component or appendage attached to a larger body or structure. Fins typically function as foils that produce lift or thrust, or provide the ability to steer or stabilize motion while traveling in water, air, or other fluids. Fin ...
which carried a
rudder A rudder is a primary control surface used to steer a ship, boat, submarine, hovercraft, aircraft, or other vehicle that moves through a fluid medium (generally air or water). On an aircraft the rudder is used primarily to counter adverse yaw a ...
with a straight and upright edge. This extended to the keel so the
elevator An elevator or lift is a cable-assisted, hydraulic cylinder-assisted, or roller-track assisted machine that vertically transports people or freight between floors, levels, or decks of a building, vessel, or other structure. They ar ...
s, attached to a
tailplane A tailplane, also known as a horizontal stabiliser, is a small lifting surface located on the tail (empennage) behind the main lifting surfaces of a fixed-wing aircraft as well as other non-fixed-wing aircraft such as helicopters and gyroplan ...
mounted on top of the fuselage, required a central cut-out for movement. The C.99 had a fixed undercarriage with its mainwheels on a single axle mounted on V-struts from each side of the fuselage. As a bomber, the C.99 could carry twelve bombs. At the Salon it was fitted with four
machine gun A machine gun is a fully automatic, rifled autoloading firearm designed for sustained direct fire with rifle cartridges. Other automatic firearms such as automatic shotguns and automatic rifles (including assault rifles and battle rifl ...
s, one fixed and forward-firing for the pilot and two on a
Scarff ring The Scarff ring was a type of machine gun mounting developed during the First World War by Warrant Officer (Gunner) F. W. Scarff of the Admiralty Air Department for use on two-seater aircraft. The mount incorporated bungee cord suspension in el ...
for the observer in the rear cockpit, who also had the fourth, rearward firing, gun in his floor.


Specifications (Hispano engine)


References

{{Caudron aircraft C.099 1920s French military reconnaissance aircraft Single-engined tractor aircraft Biplanes Aircraft first flown in 1924