If the compressed air was first tried, it was found that the loss of power is enormous. It was difficult, because filtered air quickly store it was expensive to produce, and there were problems with the thermo-dynamic applications without number. If a thousand cubic meter of air is trapped in the space of a year, a large amount of heat and developed to store and use the Air This heat must be withdrawn in some cases. Also, the high-pressure air cools when it released quickly. The result, if there is enough moisture, the freezing and clogging. For years it was believed that these difficulties are largely overcome.

But these difficulties are the same as a gain in the use of this excellent, even when aimed at an apparent paradox. There seems no sense to say that it is possible to gain too much power on a machine that you mean it in a system without friction and without waste. However, a concept very close to that condition seems to have been only in the case of compressed air. This is the warm-up on the development process. That the reader not familiar with the technical matter, there is not that they give their other properties. In compression, air is drawn into a flask, and then plunged into a reservoir surrounded by a water jacket, it took the heat generated by the compression. The machine that makes this work is a big part of what is known as the four kind of scene. That is, the air is cool at first brought the pressure to about eighty pounds, and then in a second cylinder, where it is transformed further compressed, then cooled, and then continued until the desired position. Thus, even two or three thousand pounds of pressure per square inch of air in the tank the rest somewhere in the vicinity of the temperature of the outer atmosphere. But if the air is in this situation not only an important part of the power lost in the compression works, but it is, as mentioned above, tend to freeze everything under control. But if, as it is released, it is passed through a heating or hot water heat killed, it is within the known properties of the air, an enormous growth potential. In practice, it was possible to add, warming, a PS for each power by compression develops eighth or one tenth of the original cost of the latter. That is, if a certain amount of air one U.S. dollars, the additional cost of ten cents warming his power is working to double production costs. Theoretically, the total return is actually greater than if the same amount of coal was burned in an ordinary steam engine and the power to be generated and used directly. In practical use, it is a bit less.