G-Series Improved Flaps and Ailerons


CubCrafters’ original Carbon Cub EX advanced the legendary Cub architecture into the twenty-first century. Combining modern design methods with lightweight materials, a 180 horsepower engine and a useful load over 900 lbs., the Carbon Cub EX has been the aircraft of choice among backcountry pilots since its introduction. The evolution of the Carbon Cub EX to the Carbon Cub EX-2 establishes a new benchmark for performance and ease of construction. Not only is the Carbon Cub EX-2 the best-in-class aircraft, it is the best-in-class kit.

The EX-2 revision includes an extensive series of improvements and upgrades to the kit, but the primary components are the new G-Series ailerons, flaps, and tail feathers. The G-Series control surfaces of theEX-2 improve controllability in all aspects of the flight envelope.

The roll authority of the Carbon Cub EX-2 has been improved by redesigning the aileron airfoil and relocating the hinge point. CubCrafters’ G-Series ailerons deliver markedly lighter and crisper roll response compared to legacy aircraft. Control harmony is even better than the original.

The G-Series flaps are the first truly slotted flaps available from CubCrafters. With the G-Series, the stall speed of the EX-2 with flaps extended is reduced, thus improving the already remarkable low-speed manners of the Carbon Cub. The G-Series flap features re-positioned pivot arms that, when deployed, lower the flap’s location relative to the wing, forcing high-pressure air from below the wing over the flap, and helping airflow to remain attached to the flap surface for increased lift.

The G-Series tail feathers feature new adjustable elevator stops and allow greater down-elevator trim, providing the pilot with greater trim authority when operating either at the forward or aft limits of the CG envelope. With these improvements, CubCrafters has made an already stellar performer even better.
“Since our customers love the flight characteristics of the Carbon Cub, it may be fair to ask why we would change it,” says Jim Richmond, CEO of CubCrafters. ”Knowing the control systems as well as they do, our engineering group realized there were incremental, yet important refinements available to us. Together, the G-Series control surfaces improve the overall responsiveness of the aircraft, and provide an appreciable improvement in control harmony. Experienced Cub pilots will be impressed!”

“The Carbon Cub EX-2 is a study in balance,” Richmond continues. “It would be comparatively easy to build an airplane that takes off short, lands short, or one that carries a heavy payload. The Carbon Cub EX-2 does those things, but it is also a true pilot’s airplane. It provides responsive handling, cross-country comfort, as well as fit and finish that inspire pride of ownership.”