April 2014

Experimenter is a magazine created by EAA for people who build airplanes. We will report on amateur-built aircraft as well as ultralights and other light aircraft.

Issue link: http://experimenter.epubxp.com/i/287214

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Page 21 of 38

22 Vol.3 No.4 / April 2014 THE CC02 WHY THREE LIF TING SURFACES? This was the question I asked Claude. He explained his ideas in a short and clear way: "I wanted a sleek airplane, so I designed a tandem aircraft; that solution brought me the problem of the wide CG range that became even wider with the choice of the pusher confi guration with the engine behind the rear seat. The use of the third lifting surface solved the problem of control of the wide CG range." According to Claude, the T-tail adds stability to the aircraft. Classic canard airplanes have some problems; the elevators, whose deflection is -19 degrees/+16 degrees, are always in a clean airstream, even at high angles of attack. Besides that, the classic rudder adds considerably to the aircraft maneuverability. On the very clean underside of the fuselage, two fi xed fi ns should prevent a too-violent nose-pitch-up momentum in case of the loss of lift on the swept wing. Their position and size were carefully studied in the wind tunnel. HOW WAS THE CC02 BUILT? Claude first built the fuselage molds in which the two fuse- lage halves were manufactured using fiberglass mats, epoxy resin, plus 5- to 10-millimeter-thick Klegecell foam for building the sandwich structure. The fuselage halves were then bonded together. The wings are detachable—that process takes approximately 20 minutes—and have a main spar that is carbon-fi ber rein- forced. The joint between the wing and the fuselage is not a straight line because the wing portion in front of the main spar, where it attaches to the fuselage, is used as a "wet-wing" fuel tank with the capacity of 19.7 gallons (75 liters) each. The de- tachable wing portions are 64 inches long, as measured on the main spar, and are fi xed to the fuselage with screws and safety bolts. With the wings detached, the fuselage still stands on all three wheels. Its total width is 98.4 inches (2.5 meters), just below the maximum width allowed on public roads in France; thus, trailer transport is possible. The CC02 has a fuel range of 3 hours and 15 minutes (plus 30 minutes reserve). The two The CC02 has three lifting surfaces—a canard, the main wing, and a fl ying tail. Claude said this arrangement helped him solve the problem of the wide CG range. The dropped wing leading edge offers low-speed wing effi ciency. E A A E X P _ A p r 1 4 . i n d d 2 2 EAAEXP_Apr14.indd 22 3 / 3 1 / 1 4 9 : 4 3 A M 3/31/14 9:43 AM

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