So today we have the ever so famous Fokker E-II. Honestly it was an adequate design; Antony Fokker was building more-or-less copies of the pre-war Morane monoplane (as the A-I); after he was shown Roland Garros' deflector wedges for dealing with the problem of building a machine gun & aircraft combination that a single pilot could deal with, Fokker claims to have invented an interrupter gear that would avoid the problem of degrading propeller (and thus aircraft) performance, the problem of a basic 'pusher' type design that also degraded aircraft performance, and still allow a single-seat airborne weapons system. In reality, such a design existed before the War, patented by Franz Schneider (by then working for LVG); but official indifference and Schneider's realization that military-grade ammunition often 'hung fire' made Schneider drop the project.

So, Fokker got the credit, mated the interrupter gear with his A-I, built several of them before switching to the improved E-II design, worte a whole bunch of utter bullshit about it in his autobiography, the Fokker E-series of aircraft (at least all the early ones, E-I through E-IV) launched several early famous German air heroes on their careers, and the Allies more-or-less panicked because the Germans were suddenly shooting back and created several exaggerated phrases like 'Fokker Scourge'.

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