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Videos (282) | Sift Talk (11) | Blogs (23) | Comments (820) |
Videos (282) | Sift Talk (11) | Blogs (23) | Comments (820) |
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2020 Jeep Wrangler Rolls Over In Small Overlap Crash Tests
*personal experience crashing/rolling...too much of it
I'm no doctor, but I've been in dozens of what normal people would call wrecks/accidents thanks to off road, and multiple rolls. The lateral (to the side) forces in a roll were never close to direct impact forces...not in the same ballpark. It's all about maximum force/time. Rolls are nearly always comparatively slow, drawn out rotational acceleration, crashes are quick, near instantaneous. That makes an enormous difference. Rolling at 50mph, you might get hurt. Hitting a wall at 50mph, you're lucky if you survive.
Rolling looks scary until you've done it. Dead stop crashing is scary.
Edit: I once watched a truck roll 10 times at 100mph + through a fence...driver walked away and raced later that day. That speed into a boulder, he would be dead, no question.
Citation needed*
Your spine is designed to move forward and backwards, not violently but still the mechanics allow for it. When it starts doing the same sideways, particularly in the neck as shown in this video is when you slip discs, fracture verts, pinch the cord, etc.
Buttle (Member Profile)
Your video, The Bizarre Behavior of Rotating Bodies, Explained, has made it into the Top 15 New Videos listing. Congratulations on your achievement. For your contribution you have been awarded 1 Power Point.
Mordhaus (Member Profile)
Your video, Frozen Ice Disk Looks Mesmerizing While Rotating on Water, has made it into the Top 15 New Videos listing. Congratulations on your achievement. For your contribution you have been awarded 1 Power Point.
Matt Tomasello in "Rodney Mullen on Bath Salts: Round Three"
Self *promote because without the thumbnail, the title makes little sense.
Matt Tomasello uses broken skateboards to create boards capable of impossible tricks....hinged boards, sideways boards, rotating trucks, even rotating boards. His skating is just as inventive.
Electromagnetic Railgun Firing Hypervelocity Projectile
I believe it's done with rotating mirrors.
I'm also amazed that they can capture the projectile on a panning camera.
Grooveless metal engineering
No, it's not EDM. It's machined. We produce a variety of cylinder / piston pairs, some with keyed anti rotation or beveled flanges to prevent pull through. The achievement of a visually seamless interface between two parts is certainly not trivial, but with care and the proper sequence of machining steps (guess which face you mill last? right - the one the user sees as seamless) you can do this on good quality CNC's with the right cutters. EDM'ing the complex curved shapes that truly mate across the surface on the early parts shown in the video is very (prohibitively) difficult, as you have to rely on ram EDM which is plain nasty.
It's a type of electro discharge machining. It has been around for a while but it's so damn satisfying!
Why Do Flat Earth Believers Still Exist?
Way too advanced for idiot flat earthers.
All you need to know that is that we have footage of the earth ROTATING on it's axis.
(And anyone can send their own camera high enough to watch the earth rotate)
Also the navy park their ships under the horizon (about 40 miles away from a target) so that there is no line of sight. Since their guns shoot in an arc, you don't need line of sight, so might as well keep the ship invisible.
Spinning Swing Challenge
The yt info is:
Or, in English:
Tried to watch it closely, but couldn't figure out how they had it rigged to release the 2nd person once the 1st drops off. Impressive!
McCain defending Obama 2008
I agree there has been a F load of change in personnel. The real question is does this turnover occur in in business life?
If so then one could consider Trump as some kind of dickhead to work for .
If not then what is the reason for the difference?
I think there is much more going on behind the scenes. Why would one have a military General as your chief of staff?
With Obama's top level FBI as example --
Comey -- fired
McCabe- Fired
James Baker, general counsel -- Fired
James Rybicki Chief of staff -- Fired
Perter Strozk -- Fired
Lisa Page -- ???
If Hillary was elected not of their wrong doings would have come to light. All gunning to get Trump. Still that is just the FBI.
No wonder Trump is cleaning house so much. Some bad guys found? Some paranoia?
There isn't a day goes by without something big occurring.
There is still 3 big reports to come out.
Mullers findings.
The 2nd OIG report and Huber's findings
AG Jeff Sessions appointed John Huber will be the ‘top federal prosecutor’ who will be investigating FISA abuses . Huber's staff is over 400.
Also Guantanamo Bay, Cuba-- Expanding like mad...
$14 million to expand the prison in Guantanamo Bay, Cuba. This is a "strategically critical time-sensitive expansion project". DOD justification states the "current trial support facilities are incapable of handling the large number of personnel .
https://insidedefense.com/insider/pentagon-expand-gitmo-after-trump-orders-it-remain-open
The place can hold some 2300 prisoners, currently Gitmo is currently holding 41 prisoners.. Also the 137th, 428th, and 514th was deployed this month to Gitmo for a year . Rotating people out - possible, but some 500 troops for 41 prisoners?
What is so time sensitive for to handle trial support facilities are incapable of handling the large number of personnel .-- Where are these people coming from? What is coming down the pike?
Like I said above:
I think there is much more going on behind the scenes. Why would one have a military General as your chief of staff?
I appreciate your response to my question earlier, @bobknight33.
I don't mean to try to drag you back into the thread here if you're trying to disengage -- I dunno what you mean by #walkaway. Anyway, this doesn't require a response.
CeramicSpeed 99% Efficient Drive Shaft // Chain Free Bike
The basic action is, but not the mechanism.
My idea....think spiral channels inside the tube with the cog shown attached to a piston that rides in the spiral channels. As you turn it and force is transferred, it forces the piston forward because the spiral turns rotational force into linear force. With a spring, you apply an opposing linear force so the piston only moves when those forces are unbalanced. This spring could be tunable so you select where the balance point of those forces is, thus selecting the maximum force you could apply before it changes gears for you. When there's more force applied, it "lowers" the gear, when less it automatically goes up a gear. No electronics or battery required.
At 4:20 of the vid i linked he shows what i think you are asking about.
Also @newtboy
CeramicSpeed 99% Efficient Drive Shaft // Chain Free Bike
I thought this lends itself to a spring loaded spiral shaft automatic transmission, where the more torque applied, the more it compresses the spring towards the front crank, lowering the gear you're in. This could be adjustable, allowing a rider to select how hard they want to pedal and automatically adjusting the gears to keep that force stable at any speed.
A second gear in the rear, rotating in the opposite direction and sandwiching the drive gear, would go a long way towards stopping slippage and gear wear. They certainly need to ditch the aluminum gears, though.
Just what sprang to mind when I saw it.
I'm curious to see what mechanism they use to change gears.
Trapped cat outfoxes his bullies
*cute* *kids *pets *actionpack
We're missing a rotation camera view.
You Will Not Believe What Obama Says About Trump
Right now, you need lots of samples from the target. They need to read a bunch of unusual sentences ("The method implies translation, rotation and transformation", that kind of thing), so the risk of someone "stealing" someone's voice is low at the moment.
Definitely not signing up for that...
CrushBug (Member Profile)
Congratulations! Your comment on Rotating bamboo sword challenge. has just received enough votes from the community to earn you 1 Power Point. Thank you for your quality contribution to VideoSift.
ant (Member Profile)
Congratulations! Your video, Rotating bamboo sword challenge., has reached the #1 spot in the current Top 15 New Videos listing. This is a very difficult thing to accomplish but you managed to pull it off. For your contribution you have been awarded 2 Power Points.
This achievement has earned you your "Golden One" Level 60 Badge!