The nutating engine
The nutating engine
(OP)
http://dakeynediscengine.org/default.aspx
Fair enough - but the annoyingly anonymous author says " It's use as a prime mover or if virtually died out after 1850 but today a device based on the original concept is in widespread use in the Western World. If in fact there is a better than even's chance that there is one in your home if you live in Europe or North America. "
and never mentions what he is talking about again.
Any ideas? I'm /guessing/ a gas meter or water meter.
Fair enough - but the annoyingly anonymous author says " It's use as a prime mover or if virtually died out after 1850 but today a device based on the original concept is in widespread use in the Western World. If in fact there is a better than even's chance that there is one in your home if you live in Europe or North America. "
and never mentions what he is talking about again.
Any ideas? I'm /guessing/ a gas meter or water meter.
Cheers
Greg Locock
Please see FAQ731-376: Eng-Tips.com Forum Policies for tips on how to make the best use of Eng-Tips.





RE: The nutating engine
http://ni
http://www.herseymeters.com/prod_disp_400.html
Mike Halloran
Pembroke Pines, FL, USA
RE: The nutating engine
There have been and still are a number of diesel engines that use pistons in parallel with the shaft. They drive the shaft with a swash plate or neutating disk. The earliest one I have read about were made in the late 20s. The latest was supposed to revolutinize the aircraft industry.
They all looked a little like the GM six cylinder air conditioning compressor.
RE: The nutating engine
Yeah, swashplate engines. Another way of scamming investors and/or killing engineering companies. The Harrison a/c compressors are lovely things to pull apart, I'm trying to remember how the swash angle was controlled.
Cheers
Greg Locock
Please see FAQ731-376: Eng-Tips.com Forum Policies for tips on how to make the best use of Eng-Tips.
RE: The nutating engine
Mike Halloran
Pembroke Pines, FL, USA
RE: The nutating engine
Cheers
Greg Locock
Please see FAQ731-376: Eng-Tips.com Forum Policies for tips on how to make the best use of Eng-Tips.
RE: The nutating engine
RE: The nutating engine
Is this the beast you are talking about?
http://www.mcmastermotor.com/technical.htm
B.E.
RE: The nutating engine
Cheers
Greg Locock
Please see FAQ731-376: Eng-Tips.com Forum Policies for tips on how to make the best use of Eng-Tips.
RE: The nutating engine
TTFN
FAQ731-376: Eng-Tips.com Forum Policies
RE: The nutating engine
I think you got it right in your second post.
B.E.
RE: The nutating engine
RE: The nutating engine
Some suggestion the nutating disc meter pre-dates the rotary piston meter(the rotary piston meter was patented in the UK in the late 1800's).
The same problems that beset the disc meter must surely afect the motor, leakage between the high and low pressure areas at the partition plate.
JMW
www.ViscoAnalyser.com
RE: The nutating engine
Today airplane home builders are installing them with success in small airplanes. One cohort has a two element Wankel that he is gearing down for his RV-6 airplane. The engine is a lot smaller than the equivalent Lycoming.
RE: The nutating engine
KENAT, probably the least qualified checker you'll ever meet...
RE: The nutating engine
However it is not clean or efficient.
Cheers
Greg Locock
SIG:Please see FAQ731-376: Eng-Tips.com Forum Policies for tips on how to make the best use of Eng-Tips.
RE: The nutating engine
RE: The nutating engine
RE: The nutating engine
JMV: For watermeters with magnetic impulse transferring rotating movement from spindle/magnet incased in housing to register (outside housing), there is no possibillity of leakage between wet and dry side. See:
http:/
Now, if the engine version could be equipped with some sort of magnetic clutch....? (How are the US military for RD funds at the moment..
RE: The nutating engine
I was referring to the leakage from inlet to outlet without causing rotation/nutation.
The disc is tipped and you have a line of contact between the disc and the chamber that is a radius and which is the separation between the inlet fluid and the outlet fluid. If the disc tips up a bit then this "line of contact" opens up and water can flow through the gap from the inlet to the outlet without causing nutation.
This is, in all positive displacement meters, referred to as slip flow.
The trouble with the nutating disc meter is that a small change in tip angle can open up quite a slip flow path.
What stops the disc form tipping up? the guide bearing.
As the flow rate increases the load on the guide bearing increases and the tenancy of the disc to tip up increases.
If you remove the guide bearing then the disc would tend to tip up until horizontal.
In the rotary or nutating piston meters the slip flow clearances tend to close as the flow rate increases. If you remove the guide roller they perform very poorly at low flows but you won't notice any difference at high flows.
Both principles date from the 1800s.
JMW
www.ViscoAnalyser.com
RE: The nutating engine
JMV: Noted! Thank you for the details!
RE: The nutating engine
It would seem that the Dankey design evolved into a water meter around 1850.
Sir William Siemens invented a new water meter about this time (1851)in the UK. I think this would be the British Patent Water Meter manufactured by Joseph Tylor and Sons Ltd then at their Newgate foundry in London; the rotary piston meter.
JMW
www.ViscoAnalyser.com
RE: The nutating engine
I confess, I am having a little more difficulty in determining if the meter was the rotary piston meter and if not, who did invent it. I know who manufactured it (Joseph Tylor and Sons) but not precisely when and by who. Sir William seems the most probable. If anyone knows, please let me know.
JMW
www.ViscoAnalyser.com
RE: The nutating engine
http://www.axialvectorengine.com/index.html
http://www.fairdiesel.co.uk/Techie.html
RE: The nutating engine
ht
Happy New Year
RE: The nutating engine
obligatory Wiki Link:
http://en.wikipedia.org/wiki/Sokal_affair
RE: The nutating engine
http://en.wikipedia.org/wiki/SCIgen