AF1300T - Ancillary
THREE COMPONENT BALANCE

A three-component balance designed for use with the AF1300 Subsonic Wind Tunnel.

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The Three-Component Balance fits onto the working section of TecQuipment’s Subsonic Wind Tunnel (AF1300). It may also be used with other subsonic wind tunnels of similar design. 

The Three-Component Balance provides an easy-to-use support system for wind tunnel models. It measures lift, drag and pitching moment exerted on the model. 

The balance attaches to the vertical wall of the wind tunnel working section. It is designed for air flows from right to left when the balance is viewed from the front. The balance comprises a mounting plate secured to the wind tunnel working section. A triangular force plate is held on the mounting plate by a mechanism that constrains it to move in a plane parallel to the mounting plate only, while leaving it free to rotate about a horizontal axis. This arrangement provides the necessary three degrees of freedom. 

Models for use with the balance are available from TecQuipment. Other models used with the equipment will need a mounting stem. The forces acting on the model are transmitted by cables to three strain gauged load cells. The output from each load cell is taken via an amplifier to a microprocessor-controlled display module. The display module mounts onto the wind tunnel control and instrumentation frame and includes a digital display to show the lift, drag and pitching moment directly. 

The equipment is fully compatible with TecQuipment’s Versatile Data Acquisition System (VDAS®) and can quickly and conveniently connect to a frame-mounting interface unit (VDAS-F, not included). Using VDAS® enables accurate real-time data capture, monitoring, display, calculation and charting of all relevant parameters on a suitable computer. 

The model support of the balance can be rotated by 360 degrees. This allows adjustment of the angle of incidence of the model to the direction of air flow. The model support is locked in the required position by a simple clamp after adjustment. 

The Angle Feedback Unit (AF1300U, available separately) fits onto the Three-Component Balance and transmits the rotational angle of the test model back to the automatic data acquisition unit.

VDAS AF1300 - Base Unit

An open circuit suction subsonic wind tunnel with a working section of 300 mm by 300 mm and 600 mm long.

AF1300A - Experiment

A cylinder model with a single pressure tapping point for use with the AF1300 Subsonic Wind Tunnel.

AF1300C - Experiment

A 150 mm chord NACA2412 unsymmetrical section aerofoil with 300 mm span and adjustable flap for use with the AF1300 Subsonic Wind Tunnel.

AF1300D - Experiment

A set of two aerofoils both of NACA0012 profile and 150 mm chord for use with the AF1300 Subsonic Wind Tunnel.

AF1300E - Experiment

A 100 mm diameter flat plate for use with the AF1300 Subsonic Wind Tunnel.

AF1300G - Experiment

A model aircraft with low wing configuration for use in TecQuipment's AF1300 Wind Tunnel.

AF1300H - Experiment

A model aircraft with high wing configuration for use in TecQuipment's AF1300 Wind Tunnel.

AF1300J - Experiment

Five drag investigation models for use with the TecQuipment AF1300 wind tunnel - a streamlined shape, a sphere, hemisphere, "dimpled" sphere, and a flat plate. All the models have a 50mm frontal area for easy comparison

AF1300L - Experiment

An S1210 profile aerofoil of 150 mm chord for use with the AF1300 Subsonic Wind Tunnel.

VDAS AF1300S - Package

A starter set consisting of the Subsonic Wind Tunnel AF1300,  Basic Lift and Drag Balance AF1300Z and a set of Three Dimensional Drag Models AF1300J.

AF1300Z - Ancillary

A two component balance to measure the lift and drag forces on models mounted in an AF1300 Subsonic Wind Tunnel.