Did you see that?!?!

[camion]

As you said, the shutter is moving very fast. In this case, the shutter speed is the exact rotational speed of the blades. Each frame captured shows the blades in the same position.
The same effect is why a car's wheels look like they are spinning backwards on TV.

http://io9.gizmodo.com/why-do-wheels...rds-1593807400

One thing the helicopter video seems to show is that the helicopter's blade rotation speed remains constant throughout. If the rotation speed changed then we wouldn't see the blades remain in perfect sync with the camera's frame rate.

So, how does the helicopter increase it's lift and take off if not by increasing the rate of it's blade rotation? I have a conjecture, but would like to hear a response from someone with knowledge before I duck duck go it.

[BD80]

One thing the helicopter video seems to show is that the helicopter's blade rotation speed remains constant throughout. If the rotation speed changed then we wouldn't see the blades remain in perfect sync with the camera's frame rate.

So, how does the helicopter increase it's lift and take off if not by increasing the rate of it's blade rotation? I have a conjecture, but would like to hear a response from someone with knowledge before I duck duck go it.

Go ahead and pitch your conjecture

[camion]

Go ahead and pitch your conjecture

That's pretty much what I was angling for.

[94duke]

One thing the helicopter video seems to show is that the helicopter's blade rotation speed remains constant throughout. If the rotation speed changed then we wouldn't see the blades remain in perfect sync with the camera's frame rate.

So, how does the helicopter increase it's lift and take off if not by increasing the rate of it's blade rotation? I have a conjecture, but would like to hear a response from someone with knowledge before I duck duck go it.

Clearly the pilot has a foot on the brake, then he removes it for takeoff. That thing surely has an automatic transmission.

[Rich]

One thing the helicopter video seems to show is that the helicopter's blade rotation speed remains constant throughout. If the rotation speed changed then we wouldn't see the blades remain in perfect sync with the camera's frame rate.

So, how does the helicopter increase it's lift and take off if not by increasing the rate of it's blade rotation? I have a conjecture, but would like to hear a response from someone with knowledge before I duck duck go it.

I know...strings!

[swood1000]

One thing the helicopter video seems to show is that the helicopter's blade rotation speed remains constant throughout. If the rotation speed changed then we wouldn't see the blades remain in perfect sync with the camera's frame rate.

So, how does the helicopter increase it's lift and take off if not by increasing the rate of it's blade rotation? I have a conjecture, but would like to hear a response from someone with knowledge before I duck duck go it.

The opening frame shows it already having increased its blade rotation to a speed sufficient to achieve a constant upward movement. It then changes its angle to have the same blade rotation produce a forward rather than an upward movement.

[killerleft]

Both the 'copter AND the camera employ the same Volkswagen CV joint from a 1980 Rabbit, obviously. Then it's just a matter of synching them up.

[nmduke2001]

The Red Sox really, really need to take care of that kid with some box seats!

Some sad news, Ari has passed following complications from the heart transplant. Apparently, he died while listening to the Red Sox game. RIP young man...
https://www.boston.com/news/local-ne...recipient-dies

[rthomas]

We all know that a camera does not capture every single moment that happens. There is a shutter that is moving really, really fast -- so fast that it creates the illusion of continuous movement from what is really a series of individual snapshots. That is what video is.

So, knowing that, can any of you explain how this video is possible? There are no special effects here.

This bird figured it out.

When reviewing the security footage from outside his house in Austin, Texas, Al Brooks spotted an unusual sight: a bird seems to hover past the camera with its wings completely stationary. Of course it wasn’t really hovering (and no, it’s not suspended by strings) but rather the frame rate of the camera matched the flaps of the bird’s wings perfectly resulting in a stroboscopic illusion. This is the same stroboscopic effect you might see in a video of airplane propellers that aren’t moving or when the wheels on a car appear to be frozen.

[niveklaen]

This bird figured it out.

I suspect that someone created this effect by removing the frames that were not in sink. Video runs at 20 odd frames per second. According to Google hummingbirds ave 54 beats a second.

[OldPhiKap]

I suspect that someone created this effect by removing the frames that were not in sink. Video runs at 20 odd frames per second. According to Google hummingbirds ave 54 beats a second.

Laden, or unladen?

[pfrduke]

I suspect that someone created this effect by removing the frames that were not in sink. Video runs at 20 odd frames per second. According to Google hummingbirds ave 54 beats a second.

That was definitely not a hummingbird.

[JBDuke]

I love it when someone gets clever with something that is often mundane. Here's a very clever take on the airline safety video from the folks at British Airways. You might recognize a few of these folks:

https://www.youtube.com/watch?v=YCoQwZ9BQ9Q

[mph]

Laden, or unladen?

African or European?

[OldPhiKap]

African or European?

Blue, or yellow?

[rsvman]

Are you suggesting that coconuts are migratory?

[swood1000]

Sometimes it's better to sleep on an idea and give it a fresh look in the morning.

[BD80]

Sometimes it's better to sleep on an idea and give it a fresh look in the morning.

He'd be tough to pick out of a line-up

[DukieInKansas]

Sometimes it's better to sleep on an idea and give it a fresh look in the morning.

Will his next tattoo session color the other squares green so he can blend into the wall to the right?

[DukieInKansas]

http://herosports.com/college-footba...ing-boost-bgbg

I can't figure out how to put just a picture of the new unc practice football helmets so the above is a link to an article on their new uniforms - Jordan Brand. Yes, it has the Jumpman23 logo on the helmet. Every football helmet should have someone dunking a basketball on the side of it.