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NathanielsCAD
Sweden
เข้าร่วมเมื่อ 13 ธ.ค. 2011
Mechanical Engineer & Industrial Designer!
Woodworking techniques. The 5 Cut Method (Alternative Approach).
An accurate trigonometric solution for the "5 cut method". An evolvement of the older method used by woodworkers, I call this "Nats Method".
Please try it out & write me your experiences in the comment section.
Please try it out & write me your experiences in the comment section.
มุมมอง: 502
วีดีโอ
LEGO SEMI AUTOMATIC CROSSBOW 8-SHOT
มุมมอง 3738 ปีที่แล้ว
1st Prototype: 1993 Features: a) Semiautomatic capability with 6-shot internal magazine. b) Partly automated recovery mechanism 2nd Prototype: 2016 Features: a) Semiautomatic capability with 8-shot external magazine. b) Partly automated recovery mechanism (reworked). 3rd Prototype: In planning Features: a) 8-shot external magazine (mounted beneath rather than on top) b) Fully automated recovery...
Celestial Navigation (instruction video)
มุมมอง 151K8 ปีที่แล้ว
A good comprehensive guide to Celestial Navigation.
Instructions for knitting machine
มุมมอง 3.1K9 ปีที่แล้ว
Bond Classic Knitting Machine Instruction Video. With Swedish subtitles.
Create a spring/spiral in ProE based on equations
มุมมอง 3K12 ปีที่แล้ว
Create a spring/spiral in ProE based on equations
Tilting wheelbarrow
มุมมอง 78312 ปีที่แล้ว
A tilting wheelbarrow of own design, made in Inventor. My "epicyclic gearbox" shown in an earlier video, is the mechanism that makes parts of the barrow rotate (in effect 2 gearboxes on each side).
Epicyclic gearbox in fixed star arrangement
มุมมอง 1.1K12 ปีที่แล้ว
Epicyclic gearbox ratio 6:1 in fixed star arrangement. I've created/invented this as part of a project. Some parts are also made transparent to study mechanism more easily.
Autodesk Inventor Animated 2-stroke Engine
มุมมอง 1.9K13 ปีที่แล้ว
In this animation I chose to use the visual style "shaded with edges" to enhance the details.
This is glorious... Correct, concise, and complete!
What is the source of the original film?
Perfect video about celestial navigation everseen👏👏
Longitude easy at night For the Northern hemisphere, longitude for me is easy. If you can measure the Local Hour Angle of a star on the sky to an accuracy of 4 minutes or less you can get a longitude that is one degree or less from the observing position. A slight alteration of the calculation on page 279 of the Nautical Almanac and we have this. Longitude = GST - ( RA + LHA ) or LHA = GST - ( RA + Longitude) Where GST = Greenwich Siderial Time = GHA Aries. RA = the Right Ascension of the selected star. By using Polaris as the pivot point of a star clock and a plumb bob string for a meridian reference I've been getting longitudes to less than one degree easily from a list of 30 stars around Polaris. If measuring the LHA Westward, counter clockwise from the meridian upper branch, this is the angle to be added to the RA of the selected star. If measuring the LHA Eastward, clockwise, subtract LHA from RA. This gives Local Meridian Time, or Local Siderial Time. Then subtract LST from GST to get the GHA of the observing position. LHA can be measured in either time or degrees. This reduces to a minimum the time, math, materials, and paperwork needed to get something of a longitude, even if the observing position is not known. Just thought I would tell the world in case anyone is interested.
The japanese🤣
What a joke. Will this brainwashing and indoctrination ever stop? The Earth is flat and stationary....get over it.
😂
And please provide me your email address so that i can send you a permission email for using your video on my channel
Can i ise your videos to post it on my page as many students in india can get educated from this video? If you agree please let me know
Mary Blewitt author of one of the best practical books for small boat ocean navigation.
It all begins at the King James throne
It begins with those blessed with an understanding of geometry.
see you all when earth's polarity shifts and the axial orientation changes 😁
Great elementary introduction to celestial navigation. I have to admit that I am affected by Dyscalculia. Numbers seem to come and gone like grains of cool-aid powder. At 62 I have read many books on how to Celest nav and of late watched several you-tube vids for the last ten years and it is still like looking at a muddy lake and trying to pick out a single silt particle to me. I am fascinated by Celestial Navigation but its so far beyond me. I have developed other super powers, but number evade me. Jim Rodgers
I'm remembering sea level, then moving forward
A brilliantly explained .. A.B.C A. accurate B. brief C.clear
Can anyone explain as to why is the sun going eastwards at 09:00 minutes ?
What was being depicted was merely the Sun's northward change in declination toward the first point of Aries.
the Masterpiece!
I was not thinking of a Japanese navigator this video is dated but i love it.
16:49 43:07
I was a USAF Navigator in the early 80s. I remember watching this on 16mm film. Everyone laughed at HoMoTo! This is the best video I have seen. I’m now learning to use a marine sextant. Concepts are the same but use the real horizon rather than a bubble.
Nobody needs this. We have google maps and Smartphones. Why would I bother actually learning about my place in the universe when all I need to know is how to get to work, Wal Mart, and home!
So you’re working through a series of banned accounts? Shocking.
Thank you for sharing this quality content!
This is worth watching.... Wish they would of shown this to me in school when I was a kid. Thanks 😎
This old vid is great!!!!!
zenith on the north pole is polaris; wat is zenith on the south pole?
Polaris isnt exactly above the top of our planet and its movement is measured year by year. Every night it circles the north celestial pole like every other star in the northern hemisphere. there is even closer stars to the pole than Polaris just not as bright.
So informative post this instructional video like old days very clear .. I appreciate you
Best video on celestial navigation I've ever watched
Thanks for sharing. :)
This is the clearest explanation using animations. Cannot find similar computer generated new style animations that show the same material
But flat earthers
Thank you for posting this very illustrative old instructional video. Where did this video come from? Can you credit the source in the video description? I hope more old instructional videos like this are digitized.
¿Any idea how to locate the first aries point from any place you are on earth? Is for the purpose of practicing. Maybe some DIY clinometer gadget, that help me to locate where is the vernal point, and after that, finding a star by it´s declination and AR? Or maybe a simpler method? By the way, i like your tutorials, they are very good!
You get the GHA of the first point of Aries from the Nautical Almanac. It's no longer in Aries, it is now in Pisces.
In nautical almanac GHA of Aries is given for every hour of the UT time. You take the GHA, add your longitude, and you get the LHA of aries (Local Hour Angle).
This is excellent. I love old-school instructional videos!
Needed this video for an academic competition. Masterpiece
Why does a person want to learn this? i can't understand it. as well as if the person who think it is unnecessary.
You don't need to learn how to do celestial navigation.
@@marcg1686 actually i had to at my college
Because some people travel farther than your daily trip from your trailer to the mailbox to pick up your government check.
@@DoctorShocktor doctor, be careful what u said. I am sailor so i need this actually. But i said like this because really i can't understand. Yeah, this was using then but year is 2024.
Ahhhhhhh yes, lieutenant Homoto, he so happy
Oh man that is indeed an artifact (to put it gently!), subject matter though is very well presented.
After years of following countless scatter-brained tutorials on TH-cam, it's so refreshing watching an old school professional one from long ago.
A brilliantly explained 👌.. A.B.C A. accurate B. brief C.clear
Duh huh
Excellent video ☺️👍
Quite an abrupt ending.
I did the math for getting a position from 3 observations alone. At first I tried just finding the intersection of the planes that the circles of equal altitude live in, but that can give your position with an error of a whole degree across earth's surface or more (60nmi). To get accuracy, you can find where the circles of equal altitude all nearly intersect. My result involves too much computation to do without a computer program or spreadsheet though, and I wouldn't want to have to do it by hand even with the aid of a calculator.
By manually computing means it takes time in real life application right
On a ship would you would plot the intercepts on a Universal Plotting Sheet.
Part One: Equatorial/Celestial System 00:00 Part Two: Horizon System 11:39 Part Three: The Intercept Method 18:43 Part Four: Solution and Practical Application 29:36
The music, though nice, is so annoying and overpowering it makes the lesson impossible. I'll try to find someone else. Thanks anyway.
What the sextant does is absolutely without a doubt prove the earth is a flat plane. That flat baseline is what to u traverse on earth. CANT get an elevation angle with a curved adjacent at your feet. Its an absolute fact
Please stop Trolling every navigation video David and go take a Geometry class for heavens sake!
Dude. You're a m0r0n.
@@Somethingisntright64 they failed everything...
The sextant only measures angles, like a ruler measures length. It does not prove or disprove anything. It is the calculations based on the astronomical tables and spherical trigonometry that give the position, and that does not work for a flat earth. The GPS system is also based on a spherical earth as the US Navy who operate that system will tell you. You really haven''t a clue about the subject, so why don't you go along to the nearest naval base and ask how it works? Meanwhile, have a look at this /watch?v=9IIMrk0QrIY&t=2s
@@karhukivi hey George. Let me prove you wrong real quick. You said the sextant measures ANGLES correct? Well the sextant REQUIRES 90 degrees and a circle of EQUAL elevation. Please explain how you get an elevation angle with a curved baseline at your feet? 😂 Earth is flat George. There isnt anyone antipodal to your position sitting on a toilet taking a crap UPSIDE DOWN. Oh and GPS doesnt prove ANYTHING. Just like google earth it fails to show ANY curvature or 8 inch per mile squared. Nope it shows the same elevation for miles. Also this video shows that they use the celestial sphere equator. In other words they had to cut the sphere in half and use a FLAT PLANE to do all the calculations. Why would you have to do that? 😂 Because they manipulate the math to fit a sphere model that doesnt represent reality. Earth is flat!!!!! Wake TF up already. You know what. Prove the earth us a sphere other than claiming NASA or fake x or any BS space agency that is lying to the public. You don't have any.
Holy definitions bat man!
23:29 when they show a triangle on the curved surface. How can you find the angle of the other sides when the angle will be different all the way between the three points?
Kryss Tal website.. this will show you how to calculate.
Sight Reduction tables or by using a spherical trigonometry formula.
Google on "spherical trigonometry" for a full explanation. The formulae are more complicated than those for plane triangles but work in a similar way.
Don’t bother answering this numpty. I knew I’d find one here. He’s either a lying grifter flat earth numpty, or he’s lazy and regurgitating some nonsense from one of his idiot hero’s videos, or he’s truly stupid and cannot conceive of 3D space, thinking that the lines are CURVING toward each other because they look like that on the two dimensional video screen. The fact that they are STRAIGHT LINES, traveling over a CURVED SURFACE is far, far beyond him. Just ignore the idiots.
Sir , can I know how u did this ?
Finally, a Celestial Navigation video that coincides with the H.O. No. 9 American Practical Navigator publication and is clear and concise. Thanks for posting this great film from WWII.
I'm going to guess given the animation style that this film was made in the 60's.
2:15 I like the clamp.
old but good
Nobody needs this. We have google maps and Smartphones. Why would I bother actually learning about my place in the universe when all I need to know is how to get to work, Wal Mart, and home!
This is ancient stuff. I have a GPS in my smartphone that pinpoints my location with greater precision and accuracy. Why go back to the stone ages, people? Hold on, my smartphone is on low battery so I need to find my charger cable.
The US and other Navy's would disagree, as in wartime GPS systems can be jammed, spoofed or put out of action entirely. th-cam.com/video/9IIMrk0QrIY/w-d-xo.html
Whoever designed GPS had to know this!
My boat has all the best electronics…oops, what happened to the power? Where am I?!?!?!?
YOU don’t need it, because WE don’t care if you get lost and die. So don’t worry about it champ.
By far and away the clearest explanation of celestial nav I’ve had since I was at nautical college ,especially as it must be 50 odd years old Excellent