1. AIRLESS TYRE/ NON-PNEUMATIC TYRE
Presented by
Team No.1

2. Topics What is a pneumatic tyre and its drawbacks.
What is an airless tyre?
How it works?
Different design approaches.
Advantages and disadvantages.
Applications.

3. Pneumatic tyres
A pneumatic, or air-filled, tyre is made of an air tight inner core filled with pressurized air.
The pressure of the air inside the tyre is greater than atmospheric air pressure, so the tyre remains inflated even with the weight of a vehicle resting on it.
It gives a certain degree a cushioning effect as the tyre hits bumps in the road.

4. Drawbacks Puncture or Blowout.
A blowout at high speeds can lead to a dangerous car accident.
Variations in air pressure changes tyre performance.
Can blow out by gunfire or explosion.

5. What is airless tyre?
Airless tyres or Non-pneumatic tyres (NPT) , are tyres that are not supported by air pressure.

6. continued..

7. How it works?
The flexible tread and shear bands deform temporarily as the spokes bend, then quickly go back to the initial shape.

9. Design approach
NASA’S Apollo Lunar Rover
Michelin

10. continued..
Bridgestone
Resilient Technologies, LLC

11. Advantages Eliminates air leaks or tyre blow outs.
No maintenance required.
Facilitate recycling.
Remains mobile even with some of the spokes are damaged or missing.
Durability & Long Life.
Can take gunfire or explosion.
Less environmental impact.

12. Disadvantages Lack of adjustability. Vibration.
Different Manufacturing technique.
Not as economic as pneumatic tyres.

13. Applications
Used on some small vehicles such as riding lawn mowers and
motorized golf carts.
In backhoe or bulldozers.

14. continued.. For Military vehicles Also used in
All Terrine Vehicles (ATV)

15. Conclusion
For years, vehicles have been running on pneumatic tyres and there was almost a full stop for any further improvement of tyres. In 20th century the engineers have come up with a new concept where the tyres never require air, if the drawbacks that are being encountered presently are and improved then there is good future for these tyres. And the vehicles can run without the necessity of air.