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Tesla Turbine
By Gyroscope.com
Contents
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Version 1.1 09/6/2008
Tesla Turbine Manual
Page 1 of 7
Warnings – read bef ore use
It is important to understand that this turbine is an experimental device. It is not intended
to be used for prolonged periods or to be permanently used. If you do use the turbine for
this function, use at your own risk.
Safety Checks and Warnings.
Make sure that all the screws are tightened before use (both on the casing and
inside, on the spindle).
Make sure the grub screws on the generator coupling are particularly tight as they
will be spinning at high speed. If in doubt use screw/thread sealant to reduce risk of
them becoming lose.
Always use eye protection/goggles when using the turbine.
Use a tachometer to measure the RPM of the turbine while running. Do not let the
turbine run to excessive speeds, particularly if the generator/load is not attached.
After longer periods of use or possible stress check the bearings for damage or wear.
The bearings have a ‘push’ fitting making them easy to remove/replace/change;
however this means it is possible that the bearing will spin in the housing at very
high speeds or over longer running times. This would cause damage to the housing
after prolonged use. If you intend to run the turbine for longer periods or high speed
it is recommended the bearings are sealed (similar to glue) using bearing sealant.
Do not touch the bulbs while running they will be very HOT
Do not touch the motor or shaft while running
Do not touch or put anything close to the electrics, board or bulb holder while
running. The underside of the bulb holders (board) is electrified while in use.
Under extreme pressures and stress Tesla stated that disks are liable to warp. It is
unlikely to happen on this version but please be aware that it is possible.
The turbine is designed for use with compressed air. It should be quite easy to run
the turbine from steam but new bearings will be needed and a seal added to the
axle. Proceed at your own risk.
Version 1.1 09/6/2008
Tesla Turbine Manual
Page 2 of 7
 
Specification
Sizes
Turbine diameter: 100mm
Turbine length (ex generator + mounts): 75mm
Blade/disk diameter:
78mm
Blade/disk thickness:
1.2mm
Blade/disk gap:
1.2mm
Number of Blades/disks:
10
Over base size:
113mm x 185mm
Total Weight:
1420g approx
Materials Used
Case :
HE30 aluminium
Spindle :
303 stainless steel
Disk Spacers :
HE30 aluminium
Injector :
CZ121 brass
Connectors
Inlet :
1/4 BSP
Outlet :
1/4 BSP
Adapters (supplied) :
Uni connectors
Generator
Output :
60 watts @ 10.5 VAC @ 25,000 RPM
type :
3 phase AC
MAX Output :
150 watts
Interesting features
Reversible:
Yes, using flat screwdriver
Medium:
Compressed air, vacuum.
steam, gasses or liquids possible
but require new seals.
Design improvements:
Injector system and modular designs
Replaceable parts:
Motor can be upgraded
Bulbs can be changed
Possible experiments:
New design for injector
new disks, amount of disks
different mediums
different generators
Free spare:
free 'blank' injector that can be redesigned
Version 1.1 09/6/2008
Tesla Turbine Manual
Page 3 of 7
 
History
A Tesla turbine is a quite unique technology. It was invented and patented by Nikola Tesla
on the 21st October 1909 at the United States Patent Office from experiments done in
England. The patent 1061206 was granted on the 6th May 1913. Although, it is thought that
a Tesla first showed a 200 hp 16,000 RPM version on the 10th of July 1906 (on Tesla’s 50th
birthday).
From what Tesla wrote in the patent it seems his experiments were mainly done with fluids
but had confirmed it works with air as well. Unlike conventional turbines, jet engines and
most pumps, Tesla’s turbine can be designed to be reversible with no loss in efficiency.
Normally compressed air, fluids or steam is applied to the ‘inlet’ and the turbine spins giving
a mechanic rotational output. However, it can also double up as a pump, by rotating the
shaft the air/fluid/steam can and be sucked and blown from the inlets / outlets. This makes
it unique in being a reversible turbine and a reversible pump. However efficiency increases
can be made by tailoring the pump to the medium.
The technology has remained very underused, unknown and under-developed despite its
promising characteristics. The efficiency is the stubbing block and generally unproven. I
expect over the next few years that efficiency of the turbines will dramatically improve,
particularly now that this turbine is available off-the-shelve.
Maintenance
Very little or no maintenance is required. The bearings are sealed and lubricated for life,
however the compressed air may force the oil/grease out over time. Please be aware of this
and change the bearings if needed. All screws should be checked regularly to make sure
they are tight. From time-to-time the disks should be inspected for warping.
Version 1.1 09/6/2008
Tesla Turbine Manual
Page 4 of 7
 
 
 
Perf ormance
The graph above shows the turbine in a number of configurations. As standard the turbine can spin
at the speeds indicated on line A (5 to 9 CFM) and with a bulbs connected 8 to 9 CFM is required to
power them, this is shown on line B. Changing the bulbs from 60 watts to 30 watts results in the
requirements shown in line C.
Line D and E shows the turbine after being modified. As you can see there is still huge potential for
performance improvements.
We commend testing and developing the turbine with a 8 to 10 CFM air source with a pressure
between 60 and 120psi.
It has been untested with steam, water and other mediums. However we are people that have been
adapting the turbine for such purposes.
Version 1.1 09/6/2008
Tesla Turbine Manual
Page 5 of 7
 

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