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Re: File /5)Charts_&_Tables/HARDNESSTESTER Hardness (3) (1).pdf uploaded
#file-notice
FYI? Background?
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I had check class 45 cast iron and would not fit in Rockwell tester.
Rutland had a unit for none destruction testing I purchased and very simple . A 3/16 ball from ball bearings. And a clear tube . It work but easy to lose the small ball so I up size so easier to find the ball. Then used a paint stick good and bad marks . Now my crew could check the hardness too. They set wheel on floor and drop ball. In time a rug around the wheel stop ball from hiding . The pickup ball and check next wheel. We did not check every wheel just in in each batch.
Then when looking materials it came handy too.
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Dave
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FYI I still have the test disk from Rockwell hardness test I think last for ever |
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Re: File /5)Charts_&_Tables/HARDNESSTESTER Hardness (3) (1).pdf uploaded
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Photo 1 of 3 different harness charts just uploaded?
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Re: Build ideas in Navigation & History
It fun picking a time era for building .
Most pick the the slot from 1820's to to 1950’s and mostly engines and sundials.??
There a hole world full fun ideas for build .
There who build using too of era.? I like today's tools. Myself I am looking at navigation in the1700's.?
Using today's tools and materials keeping simple easy to build?
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Dave? |
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Build ideas in Navigation & History
Building ideas
& History?
The history of navigation dates back to ancient times, with significant developments in various civilizations.
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The first part
Celestial navigation, use of landmarks, and early navigational instruments
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Celestial Navigation: Ancient navigators used the positions of celestial bodies, such as stars, the sun, and the moon, to determine their position and direction during travel. The North Star (Polaris) was particularly significant in the Northern Hemisphere
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Use of Landmarks: Sailors relied on visible landmarks such as mountains, cliffs, and coastlines to orient themselves. When landmarks were absent, they used dead reckoning, calculating their position based on speed, direction, and elapsed time
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Early Navigational Instruments: Tools like the astrolabe, a device for measuring the altitude of celestial bodies, and the compass, which provided a way to determine the direction of travel, were crucial for ancient navigation
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These techniques and tools enabled ancient sailors to navigate vast oceans and uncharted territories, expanding trade and communication across vast distances
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Indo-Pacific Navigation: Began with the Austronesians from Taiwan, who spread southwards into Island Southeast Asia and Island Melanesia around 3000-1000 BC. They used tools like star navigation and wave detection to navigate the Pacific
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Greek Navigation: By the third century BC, the Greeks began using the Little Bear (Ursa Minor) to navigate. They also used circumpolar stars to determine latitude
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Chinese Compass: In China between 1040 and 1117, the magnetic compass was developed and applied to navigation, allowing sailors to continue their course even when visibility was limited
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Portuguese Exploration: In the 16th century, Portuguese explorers took the lead in long-distance oceanic navigation, opening a network of ocean routes covering the Atlantic, Indian, and western Pacific oceans.
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Modern Navigation: The invention of the sextant in 1757 and the chronometer in the late 18th century revolutionized navigation, allowing for accurate determination of longitude and latitude.
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Open to public after 1983.
The Global Positioning System (GPS) was developed in the 20th century, transforming navigation into a modern technological marvel .
Flight 007 from Alaska to Japan open up GPS.
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THE EVENT
(Korean Air Lines Flight 007 (KE007/KAL007)was a scheduled Korean Air Lines flight from New York City to Seoul via Anchorage, Alaska. On September 1, 1983, the flight was shot down by a Soviet Sukhoi Su-15 interceptor aircraft. The Boeing 747 airliner was en route from Anchorage to Seoui.) ?
This even that open up GPS TO World |
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Re: My telegram channel.
开云体育My personal telegram channel is @JerryDurandMy blog channel is But my blog is currently in partial limbo as I currently don't have control of it from the criminal deleting my account. On 21-Feb-25 16:24, davesmith1800
wrote:
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My telegram channel
开云体育A hacker deleted my Telegram channel, I've recreated it but anyone who had my telegram contact will find it marked DELETED ACCOUNT but it will still have any old messages in it.?If you wish to re-add my new/old account, it is: @JerryDurand Jerry Durand +7 961 517 87 58 I'm in the process of getting my Telegram channel back.? It automatically transferred to an admin so it's not gone, I'm just not the owner now. |
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Add to files macking piston Ring, milling in lathe , gear cutting
Add a few more pages on making?
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Dave
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Part 1 of 2
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Part 2 of 2
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Re: My project thread
Buffalo-Springfield boiler hand hole cover stud replacement.
The original bolt was leaking where it passed thru the casting and failed a static pressure test, so I drilled and tapped it on my Logan to put it back in service.
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This old steam roller isn't exactly little, but she passed her boiler inspection and got to proudly cruise the grounds once again.
That is my '50 Farmall H parked in the roadway beside it.
(24 horsepower ride-on toy)? |
davesmith1800
Jerry Durand
