Between 1911 and 1914, the Royal Aircraft Factory used the F.E.2 ("Farman Experimental 2") designation for three quite different aircraft that shared only a common "Farman" pusher biplane layout. The third "F.E.2" type was operated as a day and night bomber and fighter by the Royal Flying Corps during the First World War.

2016年7月17日 · The F.E.2 series of aircraft were produced by the Royal Aircraft Factory and had their origins in the F.E.1, a 1910 design by the Farman Brothers of France. Geoffrey de Havilland joined the Royal Aircraft Factory and brought with him this design in the newer F.E.2 form.

2025年1月1日 · Admittedly, as a two-seater the F.E.2, affectionately nicknamed as “Fi” by its crews, was not as nimble as the newer fighters or the Eindecker, nor quite as quick with a top …

The F.E.2b was mainly used for the needs of the army: for reconnaissance and for the escort of other aircraft, and it proved to be very worthy in the battles against enemy aircraft. Often grouped with D.H.2 fighters, the F.E.2b fought back against the Fokker monoplanes that dominated the skies at the time.

British two-seater fighter Royal Aircraft Factory F.E.2 from World War One. History, development, service, specifications, pictures and model. F.E.2b with Beardmore engine of 120 h.p., sill in use as a night- bomber at the end of the war. Royal Aircraft Factory F.E.2b and F.E.2d Type: two-seater fighter (later night-bomber).

一般以V（Vertex）表示零维对象（即顶点）数D0，以E（Edge）表示一维对象（即边、棱）数D1，以F（Flat surface）表示二维对象（即面）数D2，以S（Solid）表示三维对象（即体）数D3，以 P表示 四维对象数D4。

The FE 2 series of aircraft are manufactured by the Royal Aircraft Factory and originated from the FE 1 designed by the French Falmain brothers in 1910. Geoffrey de Havilland joined the Royal Aircraft Factory with an updated design in FE 2 form.

2021年12月5日 · The Royal Aircraft Factory F.E.2 was a two-seat pusher biplane that was operated as a day and night bomber and as a fighter aircraft by the Royal Flying Corps during the First World War .

2009年2月10日 · Confront terrors both known and unknown in a explosive battle for survival with F.E.A.R 2: Project Origin for PS3. This action-packed follow-up to Monolith Productions's award-winning supernatural shooter F.E.A.R. begins where the previous game left off.

欧拉发现，不论什么形状的 凸多面体，其顶点数V、棱数E、面数F之间总有关系V+F-E=2，此式称为 欧拉公式。 V+F-E即 欧拉示性数，已成为“ 拓扑学 ”的基础概念。