Firebrand. Forward swept wing sport model, wingspan 57 in, wing area 598 sq in, for Enya .45 power.
Quote: "FSW-5 Firebird, for 40 to 60 power, 57 in wingspan, four funclion radio - guaranteed excitement from Malcolm Saunders brilliant new design.
FIREBRAND IS THE FIFTH in a series of Forward Swept Wing models I have built and is a direct development from FSW-2 and FSW-3 which appeared in RCM&E March 1981.
The aerodynamic advantages of swept forward wings, mainly good slow flying characteristics and high wing efficiency, have been known for a long time in full size aeronautical circles but difficult to apply in practice due to the high twisting loads that can be experienced in flight, demanding a very stiff wing. However just as new materials and building techniques are permitting full size aircraft manufacturers to look again at Forward Swept Wings for use in fighter aircraft of the 1990's so the introduction of foam core wings for models has provided an easy to make and very rigid wing ideally suited to model Forward Swept Wing application.
The original Firebrand was powered by an Enya 45 which provided ample power, so any 40 two-stroke should be suitable, or if you must fit a 60 then I suggest you shorten the nose by at least 1 in to lessen the need for ballast in the tail.
Construction. As the wing is required during final stages of fuselage construction it is worth thinking about the wing first. If like me you do not fancy your chances at cutting the foam cores yourself you can take advantage of our special offer for foam wings - as advertised in the caption adjacent to the plan. Either way it is best to get the wings on order first.
The wing is a standard foam veneered covered wing with balsa leading and trailing edges, joined with epoxy and reinforced with glass fibre bandage.
Wing halves are assembled with the top surfaces flat. The ailerons are top hinged at the covering stage using Solartex or Solarfilm as the hinge. The ailerons on the original were worked via torque rods let in to the top surface of the wing, but bellcrank and pushrod operation can be used if preferred... "
Firebrand, RCM&E, January 1986.
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Article pages, thanks to RFJ.
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