Internet Video Thread

[MaverickSawyer]

Is there a partial vacuum created in the combustion chamber after each pulse? Is that what sucks air in through the front vanes? That video doesn't show how they started it, either.

Yep. Usually, you need to give it some airflow to get it started. some pulse jet enthusiasts use leaf blowers, and the V-1 used either a catapult or an air drop to get it running.

 

[Urwumpe]

Yep. Usually, you need to give it some airflow to get it started. some pulse jet enthusiasts use leaf blowers, and the V-1 used either a catapult or an air drop to get it running.

The engine was started before launch. They used an air compressor and acetylene gas for that, together with the spark plugs. A wooden board at the tail pipe was used to make sure that the gas mixture does not escape too soon. After ignition and reaching the necessary thrust level for sustained operation, the spark plugs had been shutdown and the engine simply ran by the residual hot gases of the earlier ignitions providing the necessary energy.

This German drawing explains it:

A and B show the initial ignition, C and D the in-flight operation.

---------- Post added at 11:16 PM ---------- Previous post was at 10:32 AM ----------

"With FWD, every turn looks like an accident."

(Crash compilation of the Nurburgring... pretty good lesson for all new drivers in the world, since 99% of them will drive FWD)

 

[Evil_Onyx]

 

[Thunder Chicken]

 

[C3PO]

Airplane: The short version.

 

[GLS]

That, and the sequel are :rofl:

 

[Graham2001]

If at first you don't succeed...

Expanding Technology Aboard the ISS

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[boogabooga]

Re: Expandable vs. Inflatable.

I don't want to hear people say not to call it inflatable anymore. If they use air pressure to cause the expansion, then it is most certainly inflatable, like a balloon.

 

[GLS]

 

[Andy44]

This is the proper way to do a Star Wars cartoon:

 

[Graham2001]

Now for an older and slower mode of transportation...

Subway Tour: Franklin Shuttle

...and an example of one of the more shortsighted decisions by the New York MTA, the line should have been two tracks all the way...​

 

[Graham2001]

Checkin' out the new room...

First look inside BEAM

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[Andy44]

engineerguy is back with a cool Apollo vid:

 

[Graham2001]

What will they think of next...

Handy drink-driving accessory

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[orb]

 

[Unstung]

 

[Graham2001]

An interesting and genuinely creepy piece of agit-prop...

The Gate: A Short Film

...cudos to the makers for avoiding one very obvious cliche...​

 

[DaveS]

For the sake of history, 20 years ago:

 

[Andy44]

Ah yes, the movie where Marine pilots have soul patches, F/A-18's suddenly decide to grow drag chutes for some silly reason, aliens decide they want to kill us for no reason, then proceed to do it in a very inefficient manner when dropping a couple of asteroids is all that is called for, and finally, the movie where alien starships can be infected with computer viruses written by Jeff Goldblum on a 1990s laptop. Mac or Windows 95 I cannot recall...

 

[Graham2001]

And now for a different universe...

Airlords of Airia: A Steampunk Short Film

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