Features
Tesca Wheel and Axle Apparatus has dual diameter wheel has an axle supported  on simple pivots in a sturdy wall mounting bracket. Each wheel has a cord wrapped around its  periphery. The cords can be wrapped in either direction around each wheel. A load hanger is added  to each cord allowing loading of the wheels using the calibrated weights set provided. 

Using the hangers and weights allows the experimental determination of velocity ratio and  comparison with calculated values. Students can also determine the variation of effort with load and  the variation of efficiency with load. 
A comprehensive instruction manual for lecturer and student, giving full details on apparatus  assembly and operation as well as example results. All necessary assembly and operational tools are  provided 

Specifications
Wall mounted apparatus for investigation of the mechanics of simple wheel and axle machine 
Supplied with wall mounting bracket, wheel and axle machine, cord pulleys and load hangers 
Wheel diameter#1 = Ø138mm 
Wheel diameter#2 = Ø68 
Set of weights 
Comprehensive instruction manual provided

Experiments

1. Experimental determination of velocity ratio and comparison with calculated value 
2. Determination of variation with load of effort 
3. Determination of variation with load of efficiency 

Operating Conditions
Operating environment:  
     *    Laboratory  
Storage temperature range:  
     *    –25oC to +55oC (when packed for transport)  
Operating temperature range:  
     *    +5oC to +40oC  
Operating relative humidity range:  
     *    80% at temperatures < 31oC decreasing linearly to 50% at 40oC