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Farman F40

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Farman F40

Postby LesterBoffo » Tue Nov 21, 2017 2:10 pm

An example of the inertia of producing a design well past it's prime, the French Air Service fielded these anachronisms well into the third year of the Great War.

Not to say they were really horrible aircraft, but like the modernized BE2e Quirk, the changes the Farman brothers combined into this aircraft were well past their pull date. The Renault aero engine company had been producing their aircooled V8 and V12 cylinder engines since 1911, they were very reliable if not really efficient or powerful for their mass. This model was an answer to improve incrementally the performance that could be eked out of an old engine.

It could cruise at about 74 knots, but the only real improvement it provided over the MF11 Shorthorn was a swapping of the pilot and gunner positions in a roomier and more aerodynamic fuselage that was shelled in aluminum, with a bit more fuel volume to allow it to do long night bombing sorties. It was a relatively adaptable platform, like the Voisin La3 and La5 there as considerable flexibility for different gun types and mountings and the new fuselage combined with a pivoting Eteve gun mount improved the defensive gun arc. Many of these were pressed into ground attack roles.

. There was a small improvement in the F40's main wing airfoils, but they still kept the lifting stabilizer because of the rearward CG necessitated by the Renault lump in the back. This made it a challenge to pitch trim in any dive. Power on descents were the norm for this plane and level flight without payload and low fuel volumes meant a considerable amount of down elevator 'trim'. There were prototypes much later in 1917 to soldier this lattice tail onwards into 1918 with a Gnome 160 HP rotary, but the Dorand AR.II and early models of the fantastic Breguet 14's were already serving in greater numbers in French two-seater squadrons.

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Re: Farman F40

Postby LesterBoffo » Wed Nov 22, 2017 1:24 am

Now flying in FlightGear realm..

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Re: Farman F40

Postby MMW » Wed Nov 22, 2017 7:39 am

Nice job :)
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