DESCRIPTION WHEEL-TURNER FOR AIRCRAFT LANDING GEAR [Technical Field] Manufacture of aircraft wheel tires [Background Art] Upon an aircraft's take-off the break system immediately stops the rotation of the landing gear wheels and the wheels are stored into the aircraft body. Then, the wheels, which have no self-driving device, do not initiate moving until some force from outside causes it to move.

The wheels do not rotate as they are pulled down but only begin to rotate by the aircraft's forwarding force as the aircraft touches down.

At the point of the aircraft's touch-down there arises an enormous degree of friction between the wheel tires and the ground.

This is partly because the aircraft touches down at a high speed of 200km/h or so and partly because the wheels are not rotating at the moment.

This huge friction causes the following problems.

First, most importantly, it seriously wears out the wheel tires and shortens the lifespan of the wheel tires. In general lifespan of the aircraft tire is hundreds times shorter than one of other vehicle tires, which is mainly because of this friction.

Moreover, as the friction produces high thermal energy, the heat melts the remains of tires out and makes them get stuck to the runway ground, which causes the aircraft's unsafe stop through the slippery ground. For this reason, the melted remains needs to be removed at a regular basis, which increases the ground management cost.

[Disclosure of Invention] In order to minimize the abrasion of the wheel tire the friction needs to be reduced down. And the level of the friction can be significantly lowered as the wheels rotates at the equivalent speed to the aircraft's at the moment of it's touch-down.

For the purpose of the tire's self-rotation, devices with the shape of pyramid, tetrahedron or semi-cone will be attached on the lateral side of the wheel tires in a way that the angle of the device turns toward the anterior part when situated at the upper part of the wheel and toward the posterior part when situated at the lower part. Thus, as the aircraft approaches to the runway the devices at the upper part will hardly have air resistance but ones at the lower part will go against the wind whose speed is the same as the aircraft's. As a result the wheels begins to rotate. The device's size and the number need to be determined in a fashion that the wheels rotate equivalently to the speed of the aircraft at the time of the touch- down. If the wheels rotate like this the friction between the wheel tire and the runway can be minimized and so does the abrasion of the tires. This device will named as WHEEL TURNER.

The application of this device to the tire will have the following positive effects: 1. It reduces the tire's wearing-out, lengthens the tire's lifespan and saves the airplane company's economic cost.

2. It reduces the remains of the tire on the ground and enables the aircraft's more safe stop.

3. It reduces the runway management costs through less melted materials on the ground.