Author Topic: Post neat things you find on the interwebs  (Read 84663 times)

Offline Cools!

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Re: Post neat things you find on the interwebs
« Reply #240 on: Thursday, November 07, 2013, 08:45:22 PM »

Offline Cobra951

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Re: Post neat things you find on the interwebs
« Reply #241 on: Thursday, November 07, 2013, 10:39:58 PM »
No matter how that was done, it's impressive.  I'm guessing shutter speed is synched to the blade rotation, but it would have to be ridiculously fast to prevent all motion blur.

Offline PyroMenace

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Re: Post neat things you find on the interwebs
« Reply #242 on: Thursday, November 07, 2013, 10:53:21 PM »
I just assumed it was a miniature prop swinging on a string.

Offline Cools!

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Re: Post neat things you find on the interwebs
« Reply #243 on: Friday, November 08, 2013, 12:08:17 AM »
Cobra is correct. :)

Offline Cobra951

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Re: Post neat things you find on the interwebs
« Reply #244 on: Friday, November 08, 2013, 07:39:38 AM »
Wow, this is actually 6 years old at least.



2 comments seem to cover the techie stuff.  My remaining issue is with fps vs shutter speed.  That's not a 1000-fps video.  Cherrypicked frames?

Edit:  Oh, lol.  240 rpm would translate to 24 fps very nicely, or even 30 or 60 fps for that matter.

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That's a MI-24 Hind helicopter. Rotor diameter 17.3m, rotation rate 240 rpm. If rotor spans ~70% of a 640x480 frame, we have ~4cm / pixel. For blur artifacts of +/- 1 pixel, blade tip travel ~10cm is allowed. The blade tip speed is 217m/s, so a 1/2000s exposure will satisfy this. Easily attainable in broad daylight with a good lens, and easily synced with a camera running at 1000-2000fps. In the last frame, the rotor tips are noticably less distinct than near the hub. That's motion blur.

Quote
That's incorrect. Modern helicopters have a Fuel Control Unit that keeps the rotor RPM constant at all times. There may be some minor fluctuation due to load and performance but if the F.C.U. works properly the helicopter maintains pretty much the same Rotor RPM constant from takeoff to landing. Climb and descent are achived by varying the rotor blade angle of attack, therefore increasing their lift just as an airplane's wing does and not by increasing or decreasing their angular velocity.

Offline scottws

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Re:
« Reply #245 on: Friday, November 08, 2013, 10:24:43 AM »
I've seen that before. Pretty wild.

Offline W7RE

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Re: Post neat things you find on the interwebs
« Reply #246 on: Wednesday, November 20, 2013, 06:02:43 PM »

« Last Edit: Thursday, November 21, 2013, 12:26:39 AM by Cools! »

Offline Cools!

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Re: Post neat things you find on the interwebs
« Reply #247 on: Thursday, November 21, 2013, 12:27:54 AM »
Haha.

Offline Xessive

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Re: Re: Post neat things you find on the interwebs
« Reply #248 on: Friday, December 06, 2013, 01:24:45 AM »

Offline Cools!

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Re: Post neat things you find on the interwebs
« Reply #249 on: Monday, December 16, 2013, 03:39:09 PM »

Offline Quemaqua

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Re: Post neat things you find on the interwebs
« Reply #250 on: Tuesday, December 17, 2013, 07:21:39 AM »
haha, that's great

天才的な閃きと平均以下のテクニックやな。 課長有野

Offline Cools!

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Re: Post neat things you find on the interwebs
« Reply #251 on: Tuesday, December 17, 2013, 01:04:25 PM »

Offline Xessive

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Offline W7RE

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Re: Post neat things you find on the interwebs
« Reply #253 on: Tuesday, December 17, 2013, 05:01:33 PM »

Offline Xessive

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Re: Post neat things you find on the interwebs
« Reply #254 on: Wednesday, December 18, 2013, 01:16:15 PM »

Offline Cools!

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Re: Post neat things you find on the interwebs
« Reply #255 on: Wednesday, December 18, 2013, 01:19:15 PM »
Haha

Offline PyroMenace

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Re: Post neat things you find on the interwebs
« Reply #256 on: Wednesday, December 18, 2013, 03:39:22 PM »

Offline Cools!

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Re: Post neat things you find on the interwebs
« Reply #257 on: Friday, December 20, 2013, 10:50:20 AM »

Offline Xessive

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Re: Post neat things you find on the interwebs
« Reply #258 on: Friday, December 20, 2013, 12:12:02 PM »
Hahaha oh God!! The poor woman!

Offline Quemaqua

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Re: Post neat things you find on the interwebs
« Reply #259 on: Friday, December 20, 2013, 12:45:42 PM »
Hahaha, wow.

天才的な閃きと平均以下のテクニックやな。 課長有野

Offline Cools!

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Re: Post neat things you find on the interwebs
« Reply #260 on: Saturday, December 28, 2013, 04:40:59 PM »

Offline Xessive

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Re: Post neat things you find on the interwebs
« Reply #261 on: Sunday, December 29, 2013, 01:20:10 AM »
Haha Balls of Steel!

Offline Cools!

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Re: Post neat things you find on the interwebs
« Reply #262 on: Sunday, December 29, 2013, 03:11:59 AM »
Must have, he's the Devil.

Offline ren

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Re: Post neat things you find on the interwebs
« Reply #263 on: Sunday, December 29, 2013, 08:46:26 PM »
I'm just going to use this thread as an opportunity to tell everyone digg.com is awesome again. I've been checking it daily for the past couple of months and it's yet to disappoint. They consistently manage to curate interesting and obscure content.

Offline Cools!

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Re: Post neat things you find on the interwebs
« Reply #264 on: Thursday, January 02, 2014, 12:09:43 PM »
Nice try Kevin Rose!

Anyway, enjoy:


Offline Cools!

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Re: Post neat things you find on the interwebs
« Reply #265 on: Friday, January 03, 2014, 12:41:56 PM »
If I ever have a cat:


Offline Xessive

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Re: Post neat things you find on the interwebs
« Reply #266 on: Wednesday, January 08, 2014, 12:43:20 PM »

Offline Cools!

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Re: Post neat things you find on the interwebs
« Reply #267 on: Wednesday, January 08, 2014, 05:35:58 PM »
Haha!


Offline Cools!

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Re: Post neat things you find on the interwebs
« Reply #268 on: Friday, January 10, 2014, 04:56:26 PM »

Offline idolminds

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Re: Post neat things you find on the interwebs
« Reply #269 on: Wednesday, February 26, 2014, 07:41:43 PM »

Offline Cools!

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Re: Post neat things you find on the interwebs
« Reply #270 on: Wednesday, February 26, 2014, 09:32:37 PM »
Haha

Offline PyroMenace

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Re: Post neat things you find on the interwebs
« Reply #271 on: Monday, March 03, 2014, 08:52:28 PM »

Offline Quemaqua

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Re: Post neat things you find on the interwebs
« Reply #272 on: Monday, March 03, 2014, 10:53:49 PM »
The sad part is that's not the first time I've seen them. I have no idea how I ran across them the first time, but I watched like 8 videos in a row. Some of the stuff is sort of generic, but their backing band is a lot better than you'd expect them to be, and at least a couple of the songs were actually pretty damned good. At the very least, most of them are catchy enough that you'll hate yourself and feel like a pedophile when you're humming them to yourself later.

Thanks, Japan.

EDIT - I hate you a little right now, Pyro.

But okay, here:



It's a tad goofy and all, but there's more musicianship behind that than seems logical. If you cut out the pageantry and pointless "lyrics", the song would really be reasonably legit.
« Last Edit: Tuesday, March 04, 2014, 07:10:18 AM by Quemaqua »

天才的な閃きと平均以下のテクニックやな。 課長有野

Offline W7RE

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Re: Post neat things you find on the interwebs
« Reply #273 on: Tuesday, March 04, 2014, 01:42:27 AM »
It was pretty good until the chorus. Then it just sounded like generic jpop until the guitars kicked back in.

Que, your link is broken. Take out everything but the bold when using the YouTube embed thing: http://www.youtube.com/watch?v=EKfp9aKu1Mo

Offline PyroMenace

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Re: Post neat things you find on the interwebs
« Reply #274 on: Tuesday, April 22, 2014, 12:26:10 AM »
If the south gets a hold of this, it'll be the end of red necks as we know it.




Offline Xessive

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Re:
« Reply #275 on: Tuesday, April 22, 2014, 04:16:30 AM »
Haha dude that's awesome! Dangerous no doubt but awesome!

Offline Quemaqua

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Re: Post neat things you find on the interwebs
« Reply #276 on: Tuesday, April 22, 2014, 07:48:59 AM »
Jesus Christ people are stupid.

天才的な閃きと平均以下のテクニックやな。 課長有野

Offline Xessive

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Re: Post neat things you find on the interwebs
« Reply #277 on: Wednesday, April 30, 2014, 09:43:05 AM »


Flawless Ian McKellan impersonation on Fresh Prince of Belaire.
« Last Edit: Wednesday, April 30, 2014, 01:18:00 PM by Xessive »

Offline Pugnate

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Re: Post neat things you find on the interwebs
« Reply #278 on: Wednesday, April 30, 2014, 02:44:32 PM »

Offline PyroMenace

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Re: Post neat things you find on the interwebs
« Reply #279 on: Saturday, May 03, 2014, 11:52:43 AM »
Alright this is kinda crazy and awesome. Dude works on creating the perfect SimCity 3000 city, includes detailed notes and epic music for epicness.