The Spijker, Spyker V.1 or Spyker-Trompenburg V.1, was a single seat

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 ...

fighter built in the

Netherlands ) , anthem = ( en, "William of Nassau") , image_map = , map_caption = , subdivision_type = Sovereign state , subdivision_name = Kingdom of the Netherlands , established_title = Before independence , established_date = Spanish Netherl ...

during

World War I World War I (28 July 1914 11 November 1918), often abbreviated as WWI, was one of the deadliest global conflicts in history. Belligerents included much of Europe, the Russian Empire, the United States, and the Ottoman Empire, with fightin ...

. It was underpowered and did not go into production.

Design and development

After the outbreak of World War I it was difficult for the neutral Dutch armed forces to obtain aircraft from abroad and so the Ammunition Agency approached the Nederlands Automobile and Aeroplane Co. for an indigenous fighter. This request resulted in the Spijker V.1, a conventionally laid out

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 common ...

biplane powered by a 60 kW (80 hp)

Swedish Swedish or ' may refer to: Anything from or related to Sweden, a country in Northern Europe. Or, specifically: * Swedish language, a North Germanic language spoken primarily in Sweden and Finland ** Swedish alphabet, the official alphabet used by ...

licence built Thulin Gnôme

rotary engine The rotary engine is an early type of internal combustion engine, usually designed with an odd number of cylinders per row in a radial configuration. The engine's crankshaft remained stationary in operation, while the entire crankcase and i ...

. It was a

single bay 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 ...

design with 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 assisted by four parallel

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 between the central upper wing and 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 ...

. There was neither stagger nor sweep to the fabric covered wings, which had constant chord and squared tips. A semi-circular cut-out in the upper 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, 1997. ...

over the

cockpit A cockpit or flight deck is the area, usually near the front of an aircraft or spacecraft, from which a Pilot in command, pilot controls the aircraft. The cockpit of an aircraft contains flight instruments on an instrument panel, and the ...

enhanced the pilot's upward view. The V.1's fuselage was rectangular in cross-section, with the engine partially enclosed by a helmet shaped

cowling A cowling is the removable covering of a vehicle's engine, most often found on automobiles, motorcycles, airplanes, and on outboard boat motors. On airplanes, cowlings are used to reduce drag and to cool the engine. On boats, cowlings are a cove ...

open at the bottom. The open, single seat cockpit was over the wing trailing edge. The

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 gyroplane ...

, carrying separate

elevators 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 are ...

, was mounted on the top of the fuselage and wire-braced to the

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 ...

; the rounded

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 aircraft, air or watercraft, water). On an aircraft the rudder is used primarily to ...

extended to the keel. The V.1 had a fixed,

conventional undercarriage Conventional landing gear, or tailwheel-type landing gear, is an aircraft undercarriage consisting of two main wheels forward of the center of gravity and a small wheel or skid to support the tail.Crane, Dale: ''Dictionary of Aeronautical Term ...

with mainwheels on a single axle supported by two V-form pairs of struts, originally curved but straight by May 1917. There was a small tail skid mounted forward of the elevator.

Operational history

The prototype was complete by late 1916 but concerns over structural strength and some engine tuning delayed the first flight until 31 March 1917, flown by Floris Albert Van Heyst. Test flights led to aerobatics and Van Heyst became the first Dutchman to execute a loop in a military aircraft. Nonetheless, its low powered engine did not provide high enough performance for a fighter and no more powerful engines were immediately available in the Netherlands. No more V.1s were built; the prototype was bought by the

Netherlands Naval Aviation Service The Netherlands Naval Aviation Service ( nl, Marineluchtvaartdienst, shortened to MLD) is the naval aviation branch of the Royal Netherlands Navy. History World War I Although the MLD was formed in 1914, with the building of a seaplane base ...

in 1917 and retired in 1920.

Specifications

References

{{Spyker aircraft V01 1910s Dutch military aircraft Single-engined tractor aircraft Biplanes Aircraft first flown in 1917