Backcountry aircraft manufacturer CubCrafters unveiled an upgrade of its kit aircraft based on the Carbon Cub. The new Carbon Cub EX-2 made its debut at SUN ’n FUN.
The EX-2 revision includes an extensive series of improvements and upgrades to the kit, but the primary components are new G-Series ailerons, flaps, and tail feathers, company officials noted. The G-Series control surfaces of the EX-2 improve controllability in all aspects of the flight envelope, officials added.
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, company officials said. With the G-Series, the stall speed of the EX-2 with flaps extended is reduced, improving the low-speed manners of the Carbon Cub. The G-Series flap features repositioned 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, company officials said.
“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.”