Thread: Air Malaysia missing.

Originally Posted by joel0407

I just don't know why the ping in the black box is so primitive.

There are differing systems on an aircraft relating to crash position and recording. Early on it was simply an analogue cockpit voice recorder (CVR) that recorded on magnetic tape. Then analogue recording of basic flight data and aircraft systems, flight data recorder, again on magnetic tape. Now cockpit voice recording and flight data recording is incorporated in the one unit and is commonly known as a cockpit data recorder, these units no longer no longer use magnetic tape but solid state recording media and generally around the size of a shoe box and are colored bright orange.
Crash position is done by a few different systems a crash position indicator, underwater locator beacon and emergency locator beacon. The crash position indicator can be either fixed to the airframe, ejectable on a crash or incorporated within a crash data recorder, most commonly they are mounted in the tail section of the aircraft. The crash position indicators are battery powered and operate automatically, they emit an RF signal through an omni directional antenna. Emergency locator beacons are functionally similar to PLB's and EPIRBS and can be either automatic or manually operated and are also battery powered. You generally see automatically ones in the tail of the aircraft and manual ones in the cockpit. Underwater locator beacons (or pingers) are acoustic transmitters that are almost always attached to the crash data recorders. Acoustic transmitters used because the RF transmitters used in crash position indicators and emergency locator beacons have basically no range underwater. The underwater locator beacons are triggered automatically on immersion in water and transmit an omni-directional signal, they are also battery powered.

Originally Posted by Boony73

There are differing systems on an aircraft relating to crash position and recording. Early on it was simply an analogue cockpit voice recorder (CVR) that recorded on magnetic tape. Then analogue recording of basic flight data and aircraft systems, flight data recorder, again on magnetic tape. Now cockpit voice recording and flight data recording is incorporated in the one unit and is commonly known as a cockpit data recorder, these units no longer no longer use magnetic tape but solid state recording media and generally around the size of a shoe box and are colored bright orange.
Crash position is done by a few different systems a crash position indicator, underwater locator beacon and emergency locator beacon. The crash position indicator can be either fixed to the airframe, ejectable on a crash or incorporated within a crash data recorder, most commonly they are mounted in the tail section of the aircraft. The crash position indicators are battery powered and operate automatically, they emit an RF signal through an omni directional antenna. Emergency locator beacons are functionally similar to PLB's and EPIRBS and can be either automatic or manually operated and are also battery powered. You generally see automatically ones in the tail of the aircraft and manual ones in the cockpit. Underwater locator beacons (or pingers) are acoustic transmitters that are almost always attached to the crash data recorders. Acoustic transmitters used because the RF transmitters used in crash position indicators and emergency locator beacons have basically no range underwater. The underwater locator beacons are triggered automatically on immersion in water and transmit an omni-directional signal, they are also battery powered.

Ok. That's more reasonable. So this plane is just unlucky and nobody can find any signals from these devices. Some times stuff happens.




Happy Days

The R.N. submarine, HMS Tireless, has joined the search, Bob


BBC News - MH370: Missing plane search 'most challenging ever'

I can't see anything sinister about the last words said by the pilot in this transcript - even if they had been "alright, good night" as originally reported. Just common courtesy.

bloody media hyper exaggeration again.

http://www.bbc.co.uk/news/special/20...transcript.pdf

Ref; https://www.facebook.com/groups/280998512054916/

Maldives Halon Fire suppression bottle -Here is a blow up of the Halon bottle found in Maldives
http://theconservativetreehouse.file...pg?w=640&h=853

Only the tinyest bit of rust there on top and under the left mounting bracket. In salt water, that is less than <6 days, but more than 5 days of rust evidence.
Read more here-->MH-370 “The Maldives” | The Last Refuge


Ref; https://www.modstore.aero/modificati...ss%20steel_70_

Change cargo fire extinguishers from titantium to stainless steel.

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Ref; AERO - Fire Protection: Cargo Compartments

The authorities would be able to re the numbers on the bottle and cross reference with those fitted to the aircraft - as this has not been picked up on by the sensation seeking media I think it can be dismissed as it is easily checked if it came from the missing aircraft.

Garry

Originally Posted by garrycol

The authorities would be able to re the numbers on the bottle and cross reference with those fitted to the aircraft - as this has not been picked up on by the sensation seeking media I think it can be dismissed as it is easily checked if it came from the missing aircraft.

Hi Garry

I agree that if it hasn't been tampered with it, should be easy for the investigators to positively identify.

But I came across this information about a bomb on the beach on a pretty dodgy internet site and that object was found to be not a bomb.

Is it now in the waste dumpster at that Police station? How did it get to a beach in the Maldives in the first place?

Although some pundits on another forum have spotted that it could be a Halon pressure cylinder. It does look to be the same style as used in the cargo bays of Boeing aircraft.
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