Body
To add to that is the fact that very large propeller shafts on big steam
powered vessels used white oak blocks lubricated with heavy grease in
the stuffing boxes.. Of course these huge propellers only turned a few
hundred RPM but had great thrust. Interesting facts.
On 4/9/2019 5:56 PM, [email protected] [EVGRAY] wrote:
>
> Surprisingly enough many, including Parsons and Brown Boveri, used
> Babbitt bearings with a high pressure oil film.
>
>
> Ron
>
> ---In [email protected], <nwootan@...> wrote :
>
> Use your head man.?? High speed steam turbines were being built at the
> same time using high speed roller and ball bearings that lasted many
> years. very reliable.
>
> On 4/9/2019 4:17 PM, Mick mkjekyll@... <mailto:mkjekyll@...> [EVGRAY]
> wrote:
>
>> Thank you Norm,
>>
>> Great information as always!
>>
>> Just wondered what Dr Tesla may have used for bearings back then
>> before off the shelf silicon nitride and such. Something spinning
>> that fast would eat up bearings if they were not choice.?? Perhaps
>> they were ball as you allude rather than hydrodynamic fluid bearings.
>>
>> I shall order your presentation.
>>
>>
>> On 4/9/2019 1:31 PM, Norman Wootan nwootan@...
>> <mailto:nwootan@...> [EVGRAY] wrote:
>>>
>>> https://en.m.wikipedia.org/wiki/Tesla_turbine
>>>
>>> On 4/9/2019 3:28 PM, Norman Wootan wrote:
>>>>
>>>> https://www.teslatech.info/ttstore/conftapes/teslatech/2016jul/ETC16Web.pdf
>>>>
>>>> The basic principle behind the Tesla Turbine is the De Laval
>>>> Nozzle for it converts the maximum amount of potential energy,
>>>> Pressure/ Heat into Kinetic Energy with proper design and
>>>> application. If you don't understand this principle, best you
>>>> leave the turbine off your to-do list.
>>>>
>>>> I explained all this in my 2016 Presentation at the Tesla
>>>> Conference. You have to make your condensable vapor/gas
>>>> transition to supersonic before impinging upon the runner disk
>>>> pack and then go subsonic creating a shock wave that drives the
>>>> boundary layer on the disk surface so you get the maximum bang
>>>> for your buck.?? 99% of all experimenters do not understand
>>>> this.?? The driving media must be a condensable vapor so that
>>>> you have a partial vaccum,?? on the cool side and up to around
>>>> 120 PSI driving pressure on the hot side. See
>>>>
>>>> https://en.m.wikipedia.org/wiki/Ball_bearing
>>>> https://web.stanford.edu/~hydrobay/lookat/tt.html
>>>> https://www.scribd.com/doc/82705538/Tesla-Turbine-Technicals
>>>> https://auto.howstuffworks.com/tesla-turbine4.htm
>>>>
>>>> On 4/9/2019 12:29 AM, Mick mkjekyll@... <mailto:mkjekyll@...>
>>>> [EVGRAY] wrote:
>>>>>
>>>>> Norm,
>>>>>
>>>>> Your work on the Tesla Turbine, where can I find the DVD
>>>>> again, I would
>>>>> like to buy one?
>>>>>
>>>>> What did Tesla use for a bearing back then that could handle
>>>>> the RPM?
>>>>>
>>>>> I know you said he had Nozzles made by a company back then but
>>>>> bearings
>>>>> come into question.
>>>>>
>>>>> Thanks,
>>>>>
>>>>> Mick
>>>>>
>