Control Boxes

Teleflex Morse boxes are placed at either end of the cable or at an intermediate point depending on application requirements.

They translate the type of motion using a toothed wheel which is machined to match the helical cable. The wheel is attached to an operating lever or shaft to either receive or send a linear or rotary force.

Depending on the load capability requirements of the system, either a straight lead box or a wrapped lead box with more cable engagement can be used.

Operating Levers

Operating levers provide the means for the user to control the function of the cable system, whether it is for variable output or simple on-off mechanism. They interface with the cable assemblies either through lever mechanism or by connection with the toothed wheels within control boxes. Standard operating levers are available , while unique levers are designed to suit particular applications e.g. dual function engine controls, high temperature units and spring biased system controls.

A range of control handle types and shapes are also available to provide a direct method of inputting movement to a control system. Depending on the application, the handles can be additionally controlled by twisting to lock, by button locking, or by having a spring return.

Cable Tension Regulators

Teleflex Morse has been designed and manufacturing cable tension regulators for over forty years, and with the experience gained over this period ensure that the advantages inherent in their use are fully realized.

Cable tension regulators are used to maintain optimum rig tensions in cable control systems, irrespective of thermal or structural deflections of the airframe, giving benefits such as low break-out forces, lower stresses and system weight, together with longer cable life and reduced maintenance.

Cable tension regulators are designed to individual specifications, and are at present fitted in both civil and military aircraft.

The range includes quadrant types, accessory types or in-line units.

The quadrant type is installed at the pilot end or control run end of a cable loop, and maintains optimum rig tension while transmitting control movements to the flying control surfaces.

The ‘accessory’ and ‘in-line’ types install within the run length of the cable loop and will act to transmit pilot control loads, while regulating the tension in the cables within a controlled load range for best pilot feel. These units are generally installed in to flying control trim systems and engine controls or where installation is restricted.

Accessories – Rollers & Pulleys

Fairlead rollers are fabricated from nylon or other synthetic materials having a low co-efficient of dry friction and low water absorption characteristics. The assemblies are available for horizontal and vertical banks and cables, and can be installed and the roller replaced without disconnecting the control cables.

A range of pulleys is available machined from aluminium with either an anodized or nylon coating, specifically to reduce friction and cable wear. These have a machined groove to match a range of wire rope sizes both of American MIL specs or European standards. Sealed or shielded roller bearings are permanently installed for low start up torques and low running frictions for installation in to flying and engine control systems.

Screw Jacks

Teleflex Morse has wide experience in design and manufacture of a range of high efficiency screw jacks for aircraft applications, providing maximum efficiency while ensuring non-reversal of the controls.

Application of effort can be arranged for chain and sprocket drive or by torsion drive, transmitting end loads with a low friction operation to most control surfaces over a wide variation of strokes.

Screw jacks are particularly suitable for the operation of aileron, elevator and rudder trim controls, where immediate and positive response is essential.

Materials used in manufacture ensure maximum service life with the minimum of maintenance.

Actuators

Electro-mechanical actuators perform a wide range of movements in various types of applications. Designs are available which provide a rapid and specific travel in trim control in the flying control system of an aircraft. Operation is normally by switch selection and is powered by a DC motor operating through a gearbox and driving a non reversible screw to obtain the specified travel.

All designs are fully approved and qualification testing has been carried out to ensure that the units meet the full environmental conditions laid down by the CAA.