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Vintage Test Gear and Workshop Equipment For discussions about vintage test gear and workshop equipment such as coil winders. |
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4th Jul 2022, 9:51 pm | #1 |
Pentode
Join Date: Dec 2005
Location: Denton, Manchester, UK.
Posts: 186
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STC engine analyser
Split from this thread
https://www.vintage-radio.net/forum/...19#post1482719 I have here an STC "Engine Indicator" which looks like a large quite sophisticated 'scope. Works from 12vDC or 240v AC , about 12 valves and many terminals to connect to unknown sensors that I don't have. It has two accurately made moving cursors on the 6inch screen.About 1955 vintage, probably useless now but very well made. It would have measured ignition systems as well as a lot of other IC engine characteristics |
4th Jul 2022, 11:49 pm | #2 |
Moderator
Join Date: Mar 2012
Location: Fife, Scotland, UK.
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Re: STC engine analyser
Are you entirely sure it's for internal combustion engines?
"Indicator" is a key word, not normally used for internal combustion engines because it was used for a very specific instrument for measuring the power input and efficiency of steam engines. https://en.wikipedia.org/wiki/Indicator_diagram I'm just wondering whether you've come across an electronic one made to work with pressure and angle transducers, giving real-time plots of engines running at speed. Alternatively, were STC copping a free ride on the name of an earlier machine? David
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5th Jul 2022, 12:24 am | #3 |
Octode
Join Date: Jul 2011
Location: Staffordshire Moorlands, UK.
Posts: 1,464
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Re: STC engine analyser
It would be very interesting to see some photos if possible Bill.
Steve.
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5th Jul 2022, 4:52 am | #4 |
Dekatron
Join Date: Jun 2015
Location: Biggin Hill, London, UK.
Posts: 5,188
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Re: STC engine analyser
I happen to have a book to hand titled 'Modern Oil Engine Practice' dating from 1942. It mentiones in passing the 'Cathode Ray Indicator' which seems to be an electronic version of the pressure-volume plotting instrument conventionally called an 'indicator' and could well be an earlier version of this STC unit. Whether it was also used with spark-igntion engines as well as the compression ignition ones described in said book I do not know.
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5th Jul 2022, 9:43 am | #5 |
Pentode
Join Date: Dec 2005
Location: Denton, Manchester, UK.
Posts: 186
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Re: STC engine analyser
Here it is(i think)!
David may have a point about it being for steam engines, off topic, I have also got a Dobbie McInnes Indicator set, purely mechanical with rotating drum ,graph paper and string, a beautiful thing indeed! My mistake ,it's 12volt DC only Last edited by Bill; 5th Jul 2022 at 10:10 am. Reason: Further info |
5th Jul 2022, 1:53 pm | #6 |
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Join Date: Mar 2012
Location: Fife, Scotland, UK.
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Re: STC engine analyser
Dobbie McInnes Indicator is definitely steam.
David
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