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18 Mar 1914. Wednesday.

21/03/2014

And so we come to the end of this sketchbook, with yet more details of changes to the wings and rudder. While the prototype is being displayed at Olympia in London, Frank is sat at his desk at Fairlawn Avenue working on details of the modifications.

597 Larger Rudder - Ribs 18 III 1914

597 Larger Rudder – Ribs 18 III 1914

597 details the change from wooden rudder ribs to steel ones, and again it’s not clear why this should be, though my suspicion is that the rudder tends to get a lot of accidental contact during ground handling, and perhaps the very lightweight wooden ribs might have been broken by a heavy-handed workman!

598 Larger Wings Aileron Front Spar 18 III 1914

598 Larger Wings Aileron Front Spar 18 III 1914

598 has more details of the aileron and 599 and 600 are for the revised wing centre section to match the new, wider wings.

599 Larger Wings - Centre Cellule Spars

599 Larger Wings – Centre Cellule Spars

600 Larger Wing Centre Cellule Leading & Trailing Edges 18 III 1914

600 Larger Wing Centre Cellule Leading & Trailing Edges 18 III 1914

This isn’t the complete story. We know that the undercarriage was widened, and there may have been other, minor changes as well, but I only have the details of this one sketchbook to hand. Presumably there may be later sketchbooks with the details.

There must also have been an earlier one with much of the details of, for example, the all-important metal fittings for the fuselage. The Flight report from the Olympia show indicates that the joystick had two handles, and there’s not detail of that. All in all, another trip to Farnborough and the RAeS library called for!

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