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Comment Re:Airbus CEO was on hand for a comment (Score 1) 246

That's true, but another important word is cost. Apart from extended operations, APUs aren't run. For example, on the 747 it's not ever meant to be started in flight and has something like an 18k ft operating limit. I know of a few other aircraft that have APU altitude limits too, especially for bleed air (rather than just electricity).
The inconsistent battle between safety and cost is really odd to me. There are so many incredibly expensive requirements, but on the other hand you have aircraft that idle for half an hour or more in take off queues rather than be towed around (in wheel electric tow solutions are being investigated). Hell, once at LAX I saw a 757 wait 50 m from a gate for 15 minutes with both engines on. It was waiting for a marshall/ waving baton man (I was listening on my scanner). Some people are defensive about the status quo and justify this as "well imagine you had to jump out of bed and sprint 400 m", disregarding that at low volume airports aircraft do have VERY short warm up times for the engines (in my estimation my Jetstar A320 flight out of Avalon (YMAV) was under 120 seconds from a cold start sitting at the gate all night).
Mildly drunken rambling aside, yeah, there are very conservative rules in aviation, but cost considerations come into it too because everything is so god damn expensive.

Comment Re:there were no signs of fire ... wrong (Score 1) 246

Stringers run fore aft and frames circumferentially. It's not just an air skin, the skin takes the majority of the fuselage loads, and the stringers and frames are there to stop the thin skin from buckling as it does that. The frames also act as a hard point for localised forces.
Unfortunately you will probably have forgotten about this incident by the time it's reported.

Comment Re:Airbus CEO was on hand for a comment (Score 1) 246

You don't usually restart engines in flight. If it died or was shut down, it's for a good reason and it's staying that way til you land (with some rare exceptions like the BA flight into volcanic ash). On non ETOPS flights APUs aren't left running, but thanks to your comment I looked into it and learned that on ETOPS flights it often is. All these APUs also provide electrical power only above mid altitude, adding more evidence that their function is not for in flight restarts (the engine is windmilling anyway).

Comment Re:Mod parent up! (Score 1) 445

In the nicest way possible, I think you're full of shit. We have faced worse before and advanced out of it. Right now we're regressing, but I really think your bleak assessment of the possibilities holds no water.
That's not to say I agree with what's happening.

Submission + - 4G and Africa (thegrio.com)

Taco Cowboy writes: 4G service reaches Africa before much of Europe

As the continent of Africa grows economically, its citizens work hard in many sectors to help the continent shed the label of “developing” in order to be considered “developed.”

So far Liberia, Tanzania, Mauritius, Nigeria, Namibia and even the ex-communist state Angola are all 4G Internet capable. The use of 4G within Africa gives those countries the ability to communicate and in effect compete in real time with markets across the globe. Companies such as 4G Africa work towards providing 4G Internet across sub-Saharan Africa in order to “reduce the digital divide,” according to their website. Within their nations, the introduction of mobile high-speed Internet has changed the way that Africans share information, conduct business and even shop.

In Nigeria, Slim Trader, founded by Femi Akinde, allows consumers to purchase products over the phone. Founded in Namibia, Umuntu media provides local news, job listings, and more, and after 18 months of operation has portals in nine countries. The founder Johan Nel recently released a new mobile-focused website called Mimiboard. Nel explained to BBC that if “a fisherman in Mombasa can post about his catch of the day to Mimiboard, then other users in the area can go buy fish.”

“It is the fastest-growing mobile market in the world and the biggest after China,” the BBC reported in 2011, “there will be more than 735 million subscribers by the end of 2012.” With those statistics, it is no surprise that some countries in Africa have become connected to 4G internet before many countries in Europe.

Comment Re:No Cartwheeling (Score 1) 506

You'd think that having done wing design on Airbus aircraft for 7 years I would have heard of this wing fuse concept, but I haven't.
You're talking out of your arse. And it's shear, not sheer. There is no separation of flammables because that would result in the inner fuel tanks draining all over and around the aircraft. There is only one crash criterion for wings and that is no fracturing of the wing box under moderate crash accelerations, so that fuel doesn't piss out everywhere in an otherwise minor crash.

Having also been an aviation buff for my whole life and recently a glider pilot, I also have no idea about these steep and fast landings that you speak of. Airliners follow what's almost always a 3 to 4 deg glide path. That's a shallow approach which requires thrust to follow in the landing configuration. Deliberately steep approaches beyond the glideslope do not exist in airliner operations. Find me an example of these high volume airports which prefer riskier approaches.

I see you arguing a lot here on /. and I've wondered whether you really know what you're talking about. I think I have my answer.

Submission + - Wood nanobattery could be green option for large-scale energy storage (gizmag.com)

cylonlover writes: Li-ion batteries may be ok for your smartphone, but when it comes to large-scale energy storage, the priorities suddenly shift from compactness and cycling performance (at which Li-ion batteries excel) to low cost and environmental feasibility (in which Li-ion batteries still have much room for improvement). A new "wood battery" could allow the emerging sodium-ion battery technology to fit the bill as a long-lasting, efficient and environmentally friendly battery for large-scale energy storage.

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