Moving a turbine without any interfering veins? Only using smooth discs and adhesion with the air? The Tesla Turbine, made by Nikola Tesla, was certainly a marvel in its time. But this is no ordinary Tesla Turbine, but a Perez - Tesla Turbine. The Tesla Turbine was made to be simple and elegant. Pressurized air entered through the periphery, circled about, and spiraled out of the center exit. And as it did it adhered to the smooth discs inside, pulling them and affecting rotary motion. However, the air, which had been following such a graceful path, would make a hard 90 degree turn when it exited the discs. The Perez - Tesla Turbine, available here, extends Tesla's design by using trumpet shaped discs, instead of Tesla's flat discs. This allows for an even smoother transition of the working fluid throughout the engine. The axle mount for the turbine contains a fixture so that it can be mounted to a Lego Technic axle. Just blowing into the turbine, will cause this engine to rotate, though pressurized air can be used. ** Extreme caution must be used that this turbine not be driven so hard and fast, that it will disintegrate and pose a danger of flying shards. **