5' x 7' TUNNEL DETAILS
GEVERS WIND TUNNELS

SPECIFICATIONS
TEST SECTION: 5 feet high x 7 feet wide x 12 feet long
FAN: 10 feet diameter, 15 adjustable pitch blades
SCALES: 6 component, fully automated computer data acquisition system
CURRENT STATUS: updating to 800 hp and 200 mph airflow

The pictures shown here were taken during construction of the wind tunnel. Matthew Gevers (designer/builder) is standing at the exit of the fan.
Construction materials are mainly 1/2 inch thick plywood screwed to a 2x4 frame. The entire tunnel was built in 4 foot long sections that are bolted together. This made construction easier and allows for easy disasembly in the event the tunnel is to be moved. (Shown while still under construction)
The inside of the tunnel is sanded smooth and painted. Test section lighting and windows remain to be installed.
The fan is driven by a 400 HP engine with an automatic transmission. An automatic (as opposed to a standard) transmission protects the fan and structure by allowing a smooth start and also a smooth (coasting) stop if the engine should suddenly loose power. Brakes are also installed on the fan to assist in a smooth and controlled start as well as emergency stopping if necessary. Very fine and stable adjustments in airspeed are possible with a fine-adjust throttle cable.

Gevers Aircraft, Inc.
2251 Staggerwing Lane
Lafayette, Indiana 47909 USA