SPAD S.XII

Single-Seat, Single Engine Biplane Fighter Aircraft [ 1917 ]

The cannon-armed SPAD S.XII was produced in only 300 examples with many of these reserved for experienced pilots.

Authored By: Staff Writer | Last Edited: 01/16/2019 | Content ©www.MilitaryFactory.com | The following text is exclusive to this site.

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French flying ace Georges Guynemer pushed the idea of a cannon-armed fighter plane after his experiences in aircraft such as the SPAD S.VII. This led the Societe Pour l'Aviation et ses Derives (SPAD) company to develop such a system. The follow-up design came to be known as the S.XII (or S.12) and featured a 37mm cannon along with its standard single machine gun armament.

Externally, the SPAD S.XII looked every bit as a further development of the SPAD S.VII model. Due to the extra weight imposed on the airframe by the new cannon armament, the fuselage was lengthened over that of the S.VII. A Hispano-Suiza engine was once again used by SPAD and consisted of the 8Bc or 8Bec types, each offering 220 horsepower. What made the 8Bec unique was that the 37mm cannon could be nestled between the cylinder banks. Subtle changes to the wings were also necessitated by the increase in weight.

First flight for the SPAD S.XII was achieved on July 5th, 1917 with limited production examples following. The system proved a handful for the inexperienced but lethal in the hands of a proven military aviator. As the cannon system extended into the cockpit, the aircraft was not controlled through a traditional flight stick. Additionally, reloading the cannon while flying the plane added another responsibility while in-flight. The standard single 7.7mm Vickers machine gun remained a part of the offensive toolbox for the S.XII, a carry-over from the S.VII design.

Though the cannon-mounted SPAD S.XII's initially proved successful, they really required an experienced pilot at the controls of both aircraft and armament. With more and more resources being dedicated to the already proven S.VII and S.XIII designs, the S.XII was limited to a mere 300 production examples and, as such, the system never equipped an entire unit. In any case, the idea of a cannon-armed aircraft was intriguing and perfected to the extreme in the Second World War and beyond.

Like the SPAD S.VII before it and the SPAD S.XIII after it, the SPAD S.XII was designed by Louis Bechereau.©MilitaryFactory.com

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Specifications

Service Year

1917

Origin

France

Status

RETIRED
Not in Service.

Crew

1

Production

300
UNITS

Societe Pour l'Aviation et ses Derives (SPAD) - France

(View other Aviaton-Related Manufacturers)

France; Imperial Russia; Serbia; United Kingdom; United States; Yugoslavia

(OPERATORS list includes past, present, and future operators when applicable)

✓ Air-to-Air Combat, Fighter
General ability to actively engage other aircraft of similar form and function, typically through guns, missiles, and/or aerial rockets.

Length

21.0 ft
(6.40 m)

Width/Span

26.2 ft
(8.00 m)

Height

8.4 ft
(2.55 m)

Empty Wgt

1,294 lb
(587 kg)

MTOW

1,947 lb
(883 kg)

Wgt Diff

+653 lb
(+296 kg)

(Showcased structural values pertain to the base SPAD S.XII production variant)

Installed: 1 x Hispano-Suiza HS 8Bc engine developing 220 horsepower OR 1 x Hispano-Suiza HS 8Bec engine developing 220 horsepower.

Max Speed

126 mph
(203 kph | 110 kts)

Ceiling

22,474 ft
(6,850 m | 4 mi)

Range

217 mi
(350 km | 648 nm)

Rate-of-Climb

1,090 ft/min
(332 m/min)

♦ MACH Regime (Sonic)

Sub

Trans

Super

Hyper

HiHyper

ReEntry

♦

(Showcased performance specifications pertain to the base SPAD S.XII production variant. Performance specifications showcased above are subject to environmental factors as well as aircraft configuration. Estimates are made when Real Data not available. Compare this aircraft entry against any other in our database or View aircraft by powerplant type)

STANDARD:
1 x 7.7mm Vickers machine gun

Some with HS 8Bec engines featured a 1 x 37mm Puteaux cannon mounted between the cylinder banks.

Supported Types

Graphical image of an aircraft medium machine gun

Graphical image of an aircraft automatic cannon

(Not all ordnance types may be represented in the showcase above)

Hardpoint Mountings: 0

S.XII - Base Series Designation

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