In November 1936 the prototype Fokker G.I heavy fighter was exhibited at the Paris Air Show, a static exhibition in the Grand Palais. The Fokker G.I, a twin-engined, two-seat aircraft which had been named “Le Faucheur” (The Reaper), had a role as a fighter/reconnaissance and light bomber-aircraft.
The G.I engines were changed to similarly rated Pratt & Whitney SB4-G Twin Wasp Juniors during reconstruction, after the G.I suffered brake failure and rammed a hangar at Schiphol on 4 July 1937. Demonstrations had already been given to the Netherlands army air corps at Soesterberg, and considerable interest was shown, resulting at the end of the year in an order for 36 aircraft to be designated G.I Mercury. In order to ease the spares situation, it was stipulated that these must have Bristol Mercury VIII engines. This was a larger version with the armament of two 23mm can-non and two fixed 7.9mm machine guns, installed in the nose of the aircraft, and a rotatable 7.9mm machine gun in the tail, fitted in a kind of turret. The aircraft can also carry a 400kg bomb-load. Its maximum speed is 470km/hr and the radius of action is approximately 1,400km. There is a two-man crew. As a reconnaissance aircraft it has a range of 1,600km.
By the time of the German invasion 12 of the Finnish G.I Mercurys and the nine confiscated Spanish machines were complete but the intended armament of two 23-mm (0.9-in) Madsen cannon and three 7.92-mm (0.312-in) machine-guns had not been fitted. When Germany attacked the Netherlands on 10 May 1940, 23 G.ls were in service: 12 with the 4th Fighter Group at Alkmaar and 11 with the 3rd Fighter Group at Rotterdam/Waalhaven. The G.ls were successful in destroying several Junkers Ju 52/3ms during the early stages of the German invasion, but by the fifth day, when Dutch resistance ended, only a single example remained airworthy.
The Germans occupied the Fokker factory, ordering completion of the 12 G.ls intended for Finland, and these were used subsequently by the Luftwaffe as fighter trainers. Test flights from the factory were made under German supervision, but on 5 May 1941 two Dutch pilots succeeded in evading an escorting German-flown G.I and escaped to England. Their G.I Mercury was taken to the Royal Aircraft Establishment, Farnborough, for examination, and used subsequently by Phillips and Powis (Miles Aircraft) at Reading for research into wooden construction.
There never was a G.lA or a G.lB. They were officially clasified by Fokker as G.1 Wasp and G.l Mercury. Dutch air force referring to them as G.lW and G.lM.
Fokker G 1 Mercury
Engines: 2 x Bristol Mercury VIII radial, 819 hp / 619kW
Max take-off weight: 4800 kg / 10582 lb
Empty weight: 3360 kg / 7408 lb
Wingspan: 17.15 m / 56 ft 3 in
Length: 11.50 m / 37 ft 9 in
Height: 3.40 m / 11 ft 2 in
Wing area: 38.30 sq.m / 412.26 sq ft
Max. speed: 256 kts /475 km/h / 295 mph
Cruise speed: 355 km/h / 221 mph
Service ceiling: 9300 m / 30500 ft
Range: 1400 km / 870 miles
Armament: 9 x 7.9mm Madsen machine-guns, 400kg of bombs