The instrument consists of a base that holds the bearing supports and drive motor, with bearings placed in the holders to meet the testing needs of shafts either both ends fixed or one end fixed and one end free. The drive motor is operated through a variable speed control. This device demonstrates how different shafts behave while rotating around a single rotor. The test is destructive in nature, so the shaft cannot be reused after testing, making it suitable only for demonstration. Compared to bare shafts, the results match theory more closely. It also shows that the shaft runs true once it reaches its spinning speed.

Experimental Objective

• Study the effect of varying the mass of the central sleeve for Porter and Proell governors.
• Analyze the impact of changing initial spring compression for the Hartnell governor.
• Determine characteristic curves of sleeve position versus speed for all types of governors.

Specifications

• Test Shafts: Three sizes – 4.75 mm, 6.35 mm, and 7.9 mm – two pieces of each.
• Bearings: Designed to provide end conditions – (a) both ends fixed, and (b) one end fixed, one end free.
• Drive Motor: 1/8 HP, 1500 RPM motor with speed control arrangement.
• Construction: Entire assembly mounted on a sturdy, durable base.
• Rotors: Appropriately sized rotor provided for each shaft.
• Documentation: Supplied with a detailed technical manual.

Utilities required other than above supply

• Floor Space Requirement: 2 m × 1 m at standard working height.
• Power Supply: 230 V AC, 15 A with proper connection.