Ok I had a quick look at the specification of the batteries and here are my remarks:
If we consider that the venting system is only driven by the temperature differential, then the cooling valve open and close on a specif amount of time.
For example, if DeltaT=A, the orifice will open a certain amount of time t depending on the surface of the venting hole.
But if the outside pressure is decreased quickly (the thermal barrier of the packaging material might have played its part here also) and far bellow the design level, then as the time t is kept at its initial value, instead of discharging at a certain amount of flux (depending of the initial design ), the discharged flow is accelerated by the lower outside pressure with a speed V greater than the design value.
This tends to augment the temperature of the heated flows passing trough the opercule (T=P/rho ).
The heated flow will increase the inner batteries temperature, in turn augmenting the time the batteries valve will stay open.
We then have a cascading event that will end only either with a full gas discharge of the batteries, or by a spontaneous inflammation (lithium/carbon/plastics zipping point).
What we may conclude is that the crew and passengers might have been incapacitated by the toxic gazes (arsenic) or had to face a rapidly growing fire in the cargo bay with heavy smokes (plastics and carbon) and high temperature (lithium). This means that part of hull might have been very quickly breached (aluminium melting) with a large aerodynamics load impacting the trim of the airplane. We may suppose that the first reaction of the crew will have been to focus on manning the airplane and to shut all electrical sources or even climb to extinguish the fire as it was proposed earlier, but this,again, is only wild assumptions.
If I am right (that means that there is no pressure driven variable in the soft regulating the batteries) , what is urgently needed to prevent that scenario of events to happen again and be retrofitted at low cost, is either to add a pressure regulator with a pressure sensing device (an accelerometer dug in the outside skin for example) or to build a cheap sealed flight box with a regulating valve where to mandatory put electronics equipment for air shipping.
Edit:
For a better understanding, have a look here (source http://electronics.howstuffworks.com/)
the Russian air force would be vital here, attacking any military convoys trying to retreat, cutting off their escape, and destroying any units that might block the Russian military units advancing
it’s a similar strategy to the one Russia used at Stalingrad (today’s Wolgograd, 450 km straight East from Luhansk)
The RuAF will not bomb a retreating Ukr Army. Neither will it bombs its camp if they dug in. It doesn’t fit the bill (RoE and the historical dimension the Russian HQ want to put in :rolleyes: ). Unless, as it is said above, the Ukr Army commit atrocities (which can range from a fairly benign level to a full repression given the context, the mood of the ppl and the media).
NATO member pressed to increase military spending
Obama has also warned NATO member nations that, given Russia’s ambitions, each must also contribute fairly to the group’s defense, including more spending and new commitments of military resources.
Echoing that message, Defense Secretary Chuck Hagel said Friday that NATO members will be “judged harshly” if they do not increase defense spending in response to the new Russian threat.
“For decades — from the early days of the Cold War — American defense secretaries have called on European allies to ramp up their defense investment,” Hagel said in a speech at the Wilson Center.
Source:
Russia’s buildup on the Ukraine border
Source:
http://www.washingtonpost.com/
And… An other sad day in UkrHell:
Friday evening, a pro-Ukrainian mob attacked a camp where the pro-Russian supporters had pitched tents, forcing them to flee to a nearby government building, a witness said. The mob then threw gasoline bombs into the building. Police said 31 people were killed when they choked on smoke or jumped out of windows.
Asked who had thrown the molotov cocktails, pro-Ukrainian activist Diana Berg said, “Our people — but now they are helping them to escape the building.”
Also at 44:00 discussion around the hook problem: what it was and how easily it was solved (a thought on the heated debate around it with all the bashing around LM supposed poor engineering performance)
MH370: Lithium batteries complied with IATA regulations
Given that Flight 730 was able to fly for six or more hours without any communication from the crew, investigators have to consider what event could have incapacitated the pilots and passengers and yet left the 777’s essential systems working perfectly. The batteries in the cargo hold could be the cause if they overheated.
There is a debate among experts about how to classify and define the effects of a lithium-ion battery meltdown. In the case of the 787, Boeing argued that there was neither fire nor smoke. Ettel explains that in what is called a “thermal runaway” the batteries give off toxic fumes including arsenic, which are not necessarily detected by normal smoke alarms and can be lethal if not vented.
GlobalSecurity.Org reports that Kiev is re-instating military conscription.
The initial report have been posted by the Malaysian gov with cargo manifest and estimated route:
Here it is on CNN (with radio records)
Resume (Time are local and stated in MYT) :
– 0041 MYT Take-off (fuel load unknown but supposed to be full as stated earlier by MA)
-0107 last ACARS transmissions (
-0119 KLATCC cleared MH370 for HCMATCC (Vietnam)
-0121:04 Last radar observation of MH370 as it passed over waypoint
-0121:13 Radar contact lost (probably the time interval btw two “ping”)
-0138 HCMATCC request info to KLATCC about MH370
– From 0138 to 0530 attempts to contact MH370 failed
-0530: Search rescue OP initiated
The released manifest show only that 2t of electronics eq. were carried in the cargo bay including ION batteries*.
The satellite tracking show a speed ranging from 325 to 350kts and and alt from 2000 to 2800nm (10 to 15ktft)
*Wonder if somebody knows a scientific study regarding heated ION batteries (consumer products) and the effects of altitude.
ROFL nearly spit out my (late) morning cofe:
Are the angry Russians already celebrating the 1st May in Italy ?
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The news sparked outrage among groups opposed to the deal in Switzerland, that criticised what they saw as outside interference, and led to Saab withdrawing its finances from the campaign.
Meanwhile in the French foreign ministry…
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visitors are welcomed by fine art and good manner…
http://www.lopinion.fr/blog/secret-defense/rafale-a-l-honneur-quai-d-orsay-10774
and the inherent designs we know off have no problem in being scaled up to meet that requirement..
I am not sure of that. Especially regarding carrier requirements. At least for the design we have seen so far.
Concerns were raised by Salvador with this acquisition due to the location of some of the radar positioned in the South of the country in the Gulf of Fonseca (shared by the three country: Salvador Honduras and Nicaragua).
Salvador bought some additional used A37 (that they got for 3M$/pce from Ecuador if I do remind well)
I think I reported it here somewhere between October and december
EDIT: Here it is
TomcatVip,
Can you elaborate on that ?
Highly conjunctural…
All drones are expendable by nature.
No. Without playing on words, some drone are what they are because humans are the limiting factor (ex. Persistence).
As for the winders, you can see them carried in most other wind tunnel tests (some fairly recent) and they were carried for many weapon clearance flights (Alenia/Storm Shadow being the latest), so I would guess that they are used for the baseline aerodynamic configuration, as opposed to ASRAAM or IRIS-T.
Bear in mind that Aim-9L was integrated before ASRAAM or IRIS-T, and was carried for much of the original envelope expansion work, so perhaps it’s down to avoiding redoing expensive flight test work that was performed with Aim-9’s carried ?
Yes