Author Topic: First Test of a DIY Steam Turbine running off a 4" Copper MSM Boiler.  (Read 1318 times)

Offline Jim

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First Test of a DIY Steam Turbine running off a 4" Copper MSM Boiler.

[youtube1]https://youtu.be/dAtLPlYfpyA[/youtube1]
Kind regards,

Jim

simplyloco

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Re: First Test of a DIY Steam Turbine running off a 4" Copper MSM Boiler.
« Reply #1 on: December 17, 2020, 01:31:37 PM »
Love it! Any idea of the RPM?
John

Offline BillTodd

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Re: First Test of a DIY Steam Turbine running off a 4" Copper MSM Boiler.
« Reply #2 on: December 17, 2020, 04:14:32 PM »
If we new the number of padels then it would be possible to calculate the rpm from the frequency of the  sound.

Bill

Offline Jim

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Re: First Test of a DIY Steam Turbine running off a 4" Copper MSM Boiler.
« Reply #3 on: December 18, 2020, 11:18:08 PM »
Love it! Any idea of the RPM?
John

No, unfortunately I don't have a digital tachometer.
Kind regards,

Jim

Offline Jim

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Re: First Test of a DIY Steam Turbine running off a 4" Copper MSM Boiler.
« Reply #4 on: December 18, 2020, 11:19:12 PM »
If we new the number of padels then it would be possible to calculate the rpm from the frequency of the  sound.

Bill

There are sixteen (16) vanes. Working out that calculation would be wayyyyy above my pay grade.
Kind regards,

Jim

Offline Bluechip

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Re: First Test of a DIY Steam Turbine running off a 4" Copper MSM Boiler.
« Reply #5 on: December 19, 2020, 10:51:13 AM »
If we new the number of padels then it would be possible to calculate the rpm from the frequency of the  sound.

Bill

There are sixteen (16) vanes. Working out that calculation would be wayyyyy above my pay grade.

OK . Assume 10,000 RPM

Then the frequency is 10000 / 60 or 167 Hz  ( Ie Revs. per SECOND )

But we have 16 vanes so the freq. then becomes 16 x 1667 = 2667 Hz

From this we can derive  ( Freq. / # Vanes ) = ( RPM / 60 )

OR  ( pertaining to this case )

RPM =  (2667 x 60) / 16

Check:

2667 x 60 = 160,020 ..... Divide by 16 ....10,001 ... which is where we started ..  :)

Usual truncation errors  :shrug: 

Dave

Addendum ... Don't the aero geezers use / did use acoustic tachometers ?  :headscratch:  :old:
« Last Edit: December 19, 2020, 10:57:00 AM by Bluechip »

Offline Jim

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Re: First Test of a DIY Steam Turbine running off a 4" Copper MSM Boiler.
« Reply #6 on: December 19, 2020, 09:37:49 PM »
Those eBay digital tachos are looking cheaper and cheaper :)
Kind regards,

Jim

 

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