Experimenter

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: https://experimenter.epubxp.com/i/287214

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EAA Experimenter 21 Photography by Marino Boric reconditioned engine that would fi t into Claude's budget. An overhauled 200-hp Lycoming IO-360 fuel-injected engine was purchased, and around it the structure of the airplane was designed. Claude based his calculations on FAR 23 require- ments, so the result was an airplane with a V NE of 350 knots (650 kph) and operating limitations of +/-9g with a breaking load of +/-16g. The pusher confi guration was chosen because it promised the highest possible performance. Claude had an engine, con- struction materials, and a clear idea of the airplane's appear- ance and possible performance. MORE DESIGN DETAILS A swept wing with a negative dihedral was chosen for excel- lent maneuverability. Claude believed that would reduce the stabilizing ef ect of the main wings, which proved to be true later in fl ight testing. Stall resistance was solved with a dropped leading edge of the outboard portion of the wing. The airfl ow detaches from the wing in a gradual way from the fuselage to- ward the wingtips, resulting in the capability to maintain good yaw control. Claude chose the canard layout because this confi gura- tion is less prone to stall. During wind tunnel tests, the size of the foremost wing was reduced for better stall recovery and for increased stability. The CC02 main wings are fi tted with elevons—the combination of ailerons and fl aps. The fl aps de- fl ect from -5 degrees to +16 degrees, and the dif erential aileron defl ection is -22 degrees to +7 degrees. The forward lifting sur- faces—forward wings/canard—are fi tted with fl aps that defl ect when the (main) fl aps are set. Geared electric motors on the ca- nard and main wing extend fl aps simultaneously on both wings with dif erent angles; the forward fl aps travel is approximately 50 percent of the main fl aps travel with a defl ection range from 0 degrees to 12 degrees. The result is a pretty fl at landing angle of the airplane. All lifting surfaces are based on the NACA 65512 laminar fl ow airfoil. It was chosen for good performance and for the fact that it performs well, even in rain. The rear cockpit is pretty spartan as the aircraft is primarily fl own from the front seat. The CC02's fuselage features a clean belly and smooth lines. Note the closed main gear doors even while the gear is extended. E A A E X P _ A p r 1 4 . i n d d 2 1 EAAEXP_Apr14.indd 21 3 / 3 1 / 1 4 9 : 4 3 A M 3/31/14 9:43 AM

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