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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.
¿ªÔÆÌåÓýMy 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
¿ªÔÆÌåÓýA 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)? |
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Re: My project thread
¿ªÔÆÌåÓýMy wife used chlorine bleach in a spray bottle to age ironwork.? She used to be a wrought iron designer/fabricator in a very upscale area.? The type where you don't ask what someone does for a living, you just price your work accordingly and NEVER cheat them.On 17-Feb-25 0:58, Nitro via groups.io
wrote:
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Re: My project thread
1970 Murray Eliminator? restomod project.
Day one of my $20 purchase.
The wheels were too scrapped out to salvage, a brake caliper and handle were missing, so it was time to source some new parts out of my pile.
A 26 inch donor bike provided all of the brake hardware and it's Sturmey-Archer 3 speed planetary rear hub.
20 inch allow wheels were sourced for the project, but the spoke count of the original hub didn't match the new rear rim, so the 26 inch bike gave up hers for the build.
That in turn required the disassembly of three more wheels to play mix and match with the proper spoke length for my re-lace.
A vintage style cheater slick was sourced for the rear of it, and the front got treated to a super skinny tire for a three wheeled recumbent bike to stay with the dragbike theme.
The fenders were sourced from a bike that got squashed by a car.
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Since they were off a new bike, I did a faux patina treatment on them.
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They were sanded to bare metal then painted with a very similar color as what little paint was still left on the bike then soaked in a solution of white vinegar, table salt and hydrogen peroxide until the rusting began and killed most of the new paint.
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The original seat was about as hard as glass, so I soaked it in heavy coats of tire shine compound for about a month to soften her back up.
That actually worked perfectly and allowed me to retain the patina on it.
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Basically, every bearing got replaced, new brake shoes and stainless cables were added to it and the end result was a bicycle that retained her well earned look but was all new where it counted, hence the restomod designation. |
davesmith1800
Jerry Durand
