Fly Wheel
Product Code : EL-AM-10316
Quick answer: The Fly Wheel is a machined and balanced cast iron wheel on a steel spindle running in ball bearings, mounted on a wall base and supplied with cord and hook. It is used to find the moment of inertia of a flywheel from the energy given to it by a falling mass. It comes in 15, 20 and 25 cm diameters. Lab Exports manufactures it in Delhi for schools, colleges and universities.
Specifications
| Component | Specification |
|---|---|
| Wheel | Cast iron, machined and balanced; sides painted |
| Top of wheel | Chrome plated, marked with a thick line |
| Spindle | Steel, on ball bearings in iron brackets |
| Shaft | Diametric hole to take a pin and cord |
| Pointer | Fixed to one of the brackets |
| Mounting | Base with four holes for wall fixing |
| Supplied with | Cord and hook |
| Wheel diameters | 15 cm, 20 cm, 25 cm |
| Superior model | With revolution counter |
How the flywheel experiment is done
A mass m hung from a cord wound on the axle falls through a height h and sets the wheel spinning. When the cord slips off the axle after n1 turns, the wheel keeps turning and stops after n2 more turns because of friction at the bearings. The energy balance is m g h = 1/2 m v^2 + 1/2 I w^2 + n1 f, where f is the work done against friction in one turn and n2 f = 1/2 I w^2.
- Fix the wheel to the wall by its base so that the wheel turns in a vertical plane and the cord hangs clear.
- Engage the cord loop on the pin in the shaft hole, wind the cord round the axle n1 times and hang the mass on the hook.
- Release the mass; when the cord leaves the axle, start the stopwatch and count the further turns n2 using the thick line and the pointer.
- Stop the watch when the wheel comes to rest; the time t gives the angular velocity w = 4 pi n2 / t at the moment the cord detached.
- Calculate I = [n2 / (n1 + n2)] x [2 m g h / w^2 - m r^2], where r is the radius of the axle and h = 2 pi r n1.
Key features
- Cast iron wheel, carefully machined and balanced for even rotation
- Steel spindle on ball bearings in iron brackets keeps bearing friction low
- Chrome-plated top with a thick line and a fixed pointer for counting revolutions
- Diametric hole in the shaft to take the pin and cord
- Base with four holes for wall mounting; cord and hook supplied
- Choice of 15, 20 or 25 cm wheel; superior model with revolution counter
Documentation and supply
Installation instructions and a manual are supplied with the apparatus. Most Lab Exports products carry a one-year manufacturer warranty.
Lab Exports manufactures the fly wheel at its works in Laxmi Nagar, Delhi, and supplies it to schools, colleges and universities in India and 60+ countries, handling the export documents for each shipment. More about the company is on the About Lab Exports page.
Related Applied Mechanics products
- Inertia Disc (EL-AM-10315)
- Torsion Pendulum (EL-AM-10317)
- Inertia Table (EL-AM-10314)
- Torsion Pendulum (Bridge Type) (EL-AM-10318)
- Maxwell Vibration Needle (EL-AM-10313)
- Torsion Apparatus Searle's Type (EL-AM-10319)
The full range is in the Applied Mechanics section of the Physics Lab range.
Frequently asked questions
What diameters is the fly wheel available in?
The wheel is available in 15 cm, 20 cm and 25 cm diameters.
Is a fly wheel with revolution counter available?
Yes. A superior model is available with a revolution counter to record the number of turns.
How is the fly wheel mounted?
The base has four holes for fixing to a wall, and the wheel is supplied complete with cord and hook.
What is the price of the fly wheel?
Prices are not published on the website. Add the fly wheel to the Enquiry Cart with the Add To Cart button on this page, or email [email protected] with the house code EL-AM-10316 and the quantity, to receive a quotation.
Does Lab Exports manufacture the fly wheel?
Yes. Lab Exports manufactures the fly wheel at its works at 11/315, Lalita Park, Laxmi Nagar, Delhi 110092, under house code EL-AM-10316.
Request a quote
Email [email protected] with the house code EL-AM-10316 and the quantity, or add the fly wheel to the Enquiry Cart with the Add To Cart button on this page. Tender buyers can also see the Tenders and OEM page.
