THE ACI STALL WARNING UNIT FOR HOMEBUILT AND EXPERIMENTAL LIGHT AIRCRAFT
Click on any photograph to see a larger image.
This unique surface mounting electric stall warning unit was the winner of a UK design innovation award - PFA Cranfield International Rally '98
ACI stall warning unit showing sensor unit, audible alarm unit and interconnecting cable.
Typical mounting of sensor on underside of wing leading edge.
Close up of sensor mounted on underside of wing leading edge.
The system comprises a wing mounted vane operated sensor connected to an audible alarm. The key features are as follows:-
- The sensor is of the proven vane type.
- The sensor is surface mounted and no cut-out is required in the wing leading edge. Therefore it is easily fitted to different aerofoil shapes and leading edge structures.
- The sensor can be easily adjusted during flight trials to provide a stall warning at a chosen speed above the stall.
- Because it functions as a lift detector the sensor will operate correctly in high g turns - the cause of previous low level stall fatalities.
- The audible alarm is powerful enough to be heard through headsets in almost any enclosed cockpit.
- The audible alarm is adequately powered by a 9 volt PP3 battery or aircraft 12 volt supply.
- The audible alarm unit contains 2 screw type terminal blocks for easy connection of the sensor interconnection cable and the 9 or 12 volt supply
- The Low Profile Sensor is suitable for all aircraft with stall speeds between 35 and 65 knots (40-75 mph)
The drawings below are not to scale.
Click on any one of them to see a larger version with sizing details.
 |
|
|
|
|
|
|