by an engineer who is interested in getting
booklet is loaded with valuable information. With a
number of papers published
in professional engineering
journals, Cairns is no novice; he
knows what he's talking about.
Since this is a 36 page booklet each chapter is necessarily short.
But what you do get is loaded with valuable information.
Remember this is written by someone
who is interested in getting results. The last nine pages are dedicated to the model with six pages of detailed, dimensioned drawings.
TABLE OF CONTENTS:
Tesla's original machine
The Disc Turbine Operating Principle
The first experimental Turbine
The 9.75 in. Disc Prototype Turbine
Larger Turbines to 60 in. disc diameter
Other Rotary Engines
The Automotive Disc Turbine
Air Compressor, Vacuum Pump, Air Motor, Light Aircraft Engines
The Dual Direction Facility
Stresses in the discs and performance calculations
Building a model Disc Turbine
Drawings for a model Disc Turbine
"This book describes the concept of the Disc Turbine as originally patented by
Nicola Tesla, and provides concept designs for modern versions of the engine, incorporating the
Disc Turbine as a power unit for applications in Automobiles and Light Aircraft, and also give descriptions of the original Turbines and the prototype machines.
It also provides designs for other machines operating on the principle of a disc turbine: an
Air Compressor, an Air Motor, and a Vacuum Exhauster. The facility of the principle to operate in either a clockwise or anti-clockwise direction of rotation, in a single machine, using only a two-way valve, is described, and applications where this feature can be applied to advantage are suggested.
Data is given on the performances attained by the original engines, together with stress
and performance information.
Finally, we give a design for a modernised version of the original turbine, to one half scale, complete with working drawings and manufacturing instructions to enable the model or experimental engineer to construct a fully operational engine, using such tools and equipment as are usually available to model makers."
. . Required machine tools are a lathe, with a 3.5" centre height, ideally with a milling attachment, and circular table, a bench drill, micrometer or
vernier, and conventional hand tools
." [metric dimensions are
". . . The model described is approximately one half the size of the original Tesla unit, but uses present-day materials and
From the testing section: "Run for no more than two minutes, stop, check the housing temperature. If cool to slightly warm, re-open the valve and continue running.
At around 1.75 bar and 1.5
cfm, the turbine will attain a shaft speed of 20,000 R.P.M. At all times ensure a supply of oil to the bearings, and continually monitor the housing temperature.
It should be noted that the prototype attained a speed of approximately 50,000
R.P.M. under no-load conditions; hence it is advised that a brake or dynometer be provided on the shaft."