Nikola Tesla U.S. Patent 1,061,142 - Fluid Propulsion Patent Wrapper Page 41

J 1 I have made tests on a great number of steam engines for the purpose of determining their power and efficiency, and regard myself as well equipped with theoretical and practical knowledge necessary for making such tests intelligently and correctly. I have had accasion to witness the operation and to participate in a number of tests of Tesla turbines, and I have been requested to submit a sworn statement of the results of such tests and my opinion as to the novelty, efficiency and commercial value of such apparatus. The first test with a Tesla turbine witnessed by me was made in Bridgeport, Conn., at the works of the American & British Manufacturing Company in the summer of 1910. I was present during tests, at these works, on three other occasions when two different turbines were used, which I may designate, respectively, as the 100 H.P. Tesla turbine and the 600 H.P. Tesla turbine. The 100 H. P. turbine was loaded by a Prony Brake and gages were provided for reading the steam pressure at various. points in the turbine, viz; at the feed pipe, at the nozzle, beyond the nozzle and at the exhaust. A tachometer was employed for indicating the revolutions of the shaft. On two of the occasions above mentioned the readings were taken and recorded by myself, while in another instance the record was kept by Mr. Tesla. The turbine developed in the various tests made on these three occasions from 50 to 105 H.P., according to the setting of the brake. The steam pressure was approximately 90 lbs. per square inch cage pressure, the exhaust varying from one inch to ten inches vacuum, according to the load and other conditions. For so small a prime mover of 100 H.P. the -2841