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Construction

The wing is one-piece in Carbon, with an ultra high modulus spar. The outer layer is 125 gram very high-density twill weave carbon biased at 45 degrees. Inside the Balsa or Herex sandwich is a layer of 200 gram plain weave carbon again biased at 45 degrees. The spar is set into the sandwich just below the outer layer of carbon, and is tapered from centre to tip. The off cuts from this ultra high modulus unidirectional carbon are not wasted but incorporated in a tapered fashion into the D-box area of the wing. Flaps and ailerons are used, and have wipers. Torsionally both the wing and its control surfaces are very stiff. Care is taken to keep the control surfaces lightweight yet strong to resist flutter. Heavy control surfaces are bad!

The fuselage is primarily constructed in glassfibre. Carbon reinforcement is used in the large diameter tailboom, and the result is very stiff. The one-piece V-tail is bolt-on and resides in a decent sized seat, meaning the entire tail-group is very solid with no possibility of movement in the air. The heavyweight glass construction also is transparent to radar and allows the noseweight and radio equipment a better chance to reflect the radar emissions from the gun and get you that personal best! A rudimentary radar reflector is also fitted in the most forward part of the nose. So far the model is showing up very well on the gun, but the reflector experiments are ongoing and new designs of reflector will be tried and incorporated if proven better.

Flying

The DS Falcon flies smooth but responsive. So far at beyond 200 mph no signs at all of loss of control authority, bunting or tucking-under or bending, or “squirrelly” behaviour has been seen, or even hinted at. Quite often DS specific slopes only offer tiny landing zones or “front side” landings. The Falcon’s crow-braking is strong, allowing the model to be landed in small areas. So far no landing zones have troubled it. Given the amount of heavyweight carbon in the lay-up, the wing loading is quite a bit higher than you’re average 2 metre sport model. None the less it shows no adverse traits. However being an efficient model it will fly in quite light lift, but that’s not what its intended for! I designed it to operate reliably at beyond 200 mph, which is not an “average” flight envelope for the vast majority of RC aircraft.

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Contents copyright Alex McMeekin, Falcon Model, 2005,6 Site by BarkWeb