Trailing edge flap

AFC technology is also under development for a number of other air-vehicle system applications. These applications include the control and stabilization of aircraft wakes in the vicinity of directed-energy weapons augmentation or replacement of conventional aircraft-conpol effectors, such as trailing edge flaps and suppression of acoustic loads for internal weapons bays. 

Validation of such flap actuation solutions have been performed in wind tunnel tests on a one-seventh downscaled Bell-412 Mach-scaled rotor hub [87]. It has been shown that trailing edge deflections of 4° to 5° can be achieved at up to 1800 rpm which allowed suppression of vibratory bending moments imder an open loop control condition. Even some preliminary closed-loop tests using a neural network controller were performed which however required simultaneous actuation of all four blades. In [88] an induced-shear piezoelectric actuator has been described to actuate trailing edge flaps... 

Ben-Zeev, O. and Chopra, I. Advances in the Development of an Intelligent Helicopter Rotor Employing Smart Trailing-Edge Flaps. Smart Mater. Struct., 5 (1996), pp. 11-25... 

Straub, F.K. Ngo, H.T. Anand, V. and Domzalski, D.B. Development of a piezoelectric actuator for trailing edge flap control of full scale rotor blades. Smart Mater. Struct., 10 (2001), pp. 25-34... 

Centolanza, L.R. Smith, E.C. and Munsky, B. Induced-shear piezoelectric actuators for rotor blade trailing edge flaps. Smart Mater. Struct., 11 (2002), pp. 24-35... 

Trailing edge flap track support fairing [K/G]... 

Fig. 2.8. Experimental rotor blade with trailing edge flaps from Kloppel et cd. [112].

Finally, Fig. 5 is a cross section of a typical honeycomb sandwich trailing edge wing flap. Note the use of high density honeycomb to reinforce the area adjacent to the spar caps used for attachment to the main wing stracture. 

Jaguar. In-board and out-board flaps, trailing edges, tips and slats are constructed from BR-227 primed, chromic acid anodised aluminium bonded with FM-61, a 175°C curing modified epoxy film adhesive. 

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