Engine Appears
Posted on | January 4, 2009 | 5 Comments
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Engine Appears
I drive a Ford Fiesta 1.4 Zetec manual 2003 and the Engine light has appeared on the dash.?
Is this a persistant occurance in Fiestas? If not what does this usually appear on the dash for? Ie what are the reasons for the appearance of the Engine light, what problems can this signify?
there could be a thousand things that cause the engine light to come on. but if it just came on right after you filled your gas tank try tightening the fuel cap if that doesnt work then you can take it to the nearest repair shop and they can tell you whats going on
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20 Mono-Pole Bedini Motor / Pulse Engine
How fast can a jet engine windmill?
This engine appears to be windmilling, since it is rotating the wrong way ( http://www.youtube.com/watch?v=WU5L9-7ScPU ). It is going quite fast. You can see the paper strips on the step ladder are blowing in the wind. How fast can a jet engine rotate due to windmilling?
I mean generally. Look at the video in the question. Would you describe that as particularly fast or unusual?
It looks like it's rotating the correct way (clockwise) to me. Most RR engines turn the opposite way from GE and P&W. There's no particular advantage of one direction over the other.
Engines can windmill "backwards" if the wind is blowing from behind the aircraft , but if possible you usually park aircraft with the nose into the wind to avoid this, because it doesn't help engine starting (for the obvious reason).
They can windmill quite fast. In flight, speeds can be up to 30% or 40% of the max speed because of the forward speed of the aircraft. On the ground in a moderate wind, they can easily spin too fast to count the revs.
The power produced by a fan (or the power to make it windmill) is roughly proportional to rotation speed cubed, so if the wind is only producing 1/1000 of the power that the engine produces, it will windmill at about 1/10 of max speed. That would be windmilling at about 300 rpm for a typical large turbofan like a 747 or 777 engine.
Sometimes, doing test procedures (on a non-running engine inside a building) you want to keep the rotors turning at 1 or 2 rpm, to avoid any "sticking" friction affecting the results. You can do that by just putting a normal office fan in front of the engine to blow a bit of air through it. The amount of friction in the shaft bearings is tiny. You can easily turn the 8 foot diameter fan with one finger.
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5 Responses to “Engine Appears”
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January 5th, 2011 @ 2:23 am
Yep they're great!
March 15th, 2011 @ 3:33 pm
@ Mia: Exactly my point! :|
piscianemperor: Firstly, if you're doing something, make sure it's so good that people KNOW of it. You don't need to run around making them know OF it. (Notice the capitalization). One example: Did you know that Google as a search engine was never advertised? Now you see Adsense and all that, but this is after it became (almost) a monopoly.
Secondly, I agree with your last statement. But again, someone who goes to sleep on an empty stomach will want money to feed himself two good meals a day, not money to get rich. I doubt he thinks about that. Now, that's just speculation, but that's my reading of it.
September 9th, 2011 @ 7:50 pm
The Apple guru and startup investor, chose an unfortunate moment to roll out his aptitude test for venture capitalists. Since Guy Kawasaki launched the online quiz on his popular blog about startup culture and investing, let's see what happened. On his site, the tech maven lists directorships of three tech ventures. Growth at Simplyhired, the jobs search engine, appears to have stalled in 2006. Filmloop, a photo slideshow service which competes with Slide, laid off most its staff during the holidays. And Bitpass just discontinued its micropayments service. Kawasaki's remaining external directorships are on the boards of a Palo Alto Montessori school, and the Hawaiian Islands Ministry. Oh, and here's a bonus factoid for superstitious readers. The title of the web page on which the startup evangelist's jinxed portfolio was listed: Guy's Golden Touch.]]>
November 6th, 2011 @ 12:50 am
It's probably in the game files.
December 12th, 2011 @ 9:30 am
cnet post.
Also wikipedia has some good info on it, including this quote,
“In the Privacy Impact Assessment (PIA) for Einstein 2 published in 2008, DHS gave a general notice to people who use U.S. federal networks. DHS assumes that Internet users do not expect privacy in the “To” and “From” addresses of their email or in the “IP addresses of the websites they visit” because their service providers use that information for routing.”
One could assume from this quote that it means they are not just tracking packets, but email addresses and websites that are visited. This is for Einstein 2 also, and not the newer version.
Also, tracking online surfing is not new, one major search engine appears to already be doing that.
Pretty crazy, but when you are fighting an enemy that hides amongst the innocent it may be a necessary evil. Why Google is doing it though, I do not understand…]]>