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I wouldn't say it's like TWA 800 so I agree with that much. But what was the cause in Apollo 13? It was indeed a wiring short (failed insulation), but it was for a stirring fan, not a fuel level sensor. A fan would take more current than a fuel level sensor which is generally a milliamp level device as stated by the investigator in the documentary, so it's harder for such low power devices as fuel level sensors to be ignition sources. One possibility if a fuel level sensor shorted is that it might just stop working, and it may not ignite anything at all.
Originally posted by Dragoon01
Uhhh no.....Apollo 13 was a leak in an Oxygen tank which leaked into other areas of the module. TWA is supposed to be a short INSIDE of the actual fuel tank. So like all of the other examples I mentioned above Apollo 13 is nothing like TWA 800.
In fact, the number-2 oxygen tank, one of two in the Service Module (SM), had exploded.[11] Damaged Teflon insulation on the wires to the stirring fan inside oxygen tank 2 allowed the wires to short-circuit and ignite this insulation. The resulting fire rapidly increased pressure beyond its 1,000 pounds per square inch (6.9 MPa) limit and the tank dome failed
Except that fan circuits are designed to provide moderate current (perhaps amps) which is relatively large compared to fuel sensor circuits which are only designed to supply small currents (milliamps). So I don't think the comparison is that close for that reason. Amps are a thousand times greater than milliamps and power of one amp is a million times as great as a milliamp going into the same resistance, therefore much more capable of producing the heat needed to catch insulation on fire.
Originally posted by samkent
IIRC a short external to the fuel tank placed a large current through wires that did go into the tank.
So my compairison is indeed very close. Too much current in a place with combustible gasses.
Amps are a thousand times greater than milliamps and therefore much more capable of producing the heat needed to catch insulation on fire. Not only that but the power of one amp is a million times as great as a milliamp going into the same resistance, so these are factors to consider regarding the similarity.
Also, it wasn't a fuel tank in Apollo 13, it was an oxygen tank.
Originally posted by samkent
reply to post by Arbitrageur
Amps are a thousand times greater than milliamps and therefore much more capable of producing the heat needed to catch insulation on fire. Not only that but the power of one amp is a million times as great as a milliamp going into the same resistance, so these are factors to consider regarding the similarity.
Also, it wasn't a fuel tank in Apollo 13, it was an oxygen tank.
Too much current through damaged wires (Apollo) or wires that were not designed for high current (TWA).
Both had combustible gasses inside. Both went boom.
To me it's the same bird with different color feathers.
When this whole thing plays itself out I hope they hang the producer out to dry.
The most solid evidence would possibly be in the parts of the underwater video that were edited out so NTSB investigators could not see the unedited video.
Originally posted by EViLKoNCEPTz
People's opinions and speculation aren't evidence. If they had any solid evidence they would be filing court proceedings, either civil or criminal, not producing a documentary. Evidence is something you take to court not spout out to a camera to profit from.
So are you saying that mach 4 debris would be consistent with a center fuel tank explosion?
Originally posted by EViLKoNCEPTz
The radar data would be inconclusive as a blast with enough force to rip a 747 apart could easily propel debris at speeds up to mach 4. ANFO has a blast force of over 5000 meters per second, well above mach 4, a large fuel explosion from a pressurized vessel such as a fuel tank on an aircraft would produce similar results.
I posted a link to the petition here.
Originally posted by research100
they signed and filed a petition to reopen which is what the NTSB requires for something like this
I'm not sure why you're citing ANFO, airliners don't use that, right?
Originally posted by EViLKoNCEPTz
An explosion with enough force to rip the plane apart would definitely have the force to propel small and medium debris upwards of Mach 4, possibly even larger pieces of debris as well.
Joseph E. Shepherd of Cal-Tech’s Explosion Dynamics Laboratory and Melvin Baer of Sandia National Laboratories concluded that what occurred in TWA 800’s center tank was a deflagration or sub-sonic explosion. According to Baer, had the explosion been super-sonic, the tank would have been recovered in small pieces instead of in the large sections that the Navy found.
Baer and Shepherd’s conclusions regarding the fuel tank explosion appear sound. However, as the radar data shows, this explosion was not the initiating event but a secondary explosion that followed a prior super-sonic detonation. The NTSB did not ask Baer or Shepherd to review the radar data showing that a super-sonic explosion had occurred prior to the fuel tank explosion.
Neither Baer, Shepherd, nor any other scientists commissioned by the NTSB, nor any NTSB investigators analyzed the debris associated with the supersonic explosion. Further, although the debris was clearly recorded by all the nearby radar sites, the NTSB did not list it in their official debris field database.
We will prescribe an exit velocity equal to the explosion velocity: 100 m/s.
Typical detonation velocities in gases range from 1800 m/s to 3000 m/s.
1.16.4 Additional Metallurgical, Material, and Structural Testing and Information
1.16.4.1 Metallurgical Examination of Several Small Holes in the Accident Airplaneís Structure
1.16.4.2 Metallurgical Examination of Fatigue Cracking
1.16.4.3 Metallurgical Examination of the Fuselage Joint Between Sections 41 and 42
1.16.4.4 Metallurgical Examination of the Forward Cargo Door
1.16.4.5 Metallurgical Examination of Nose Landing Gear Doors and Surrounding Structure
I don't know if the mach 4 calculation is correct, but if it is, that doesn't seem to have been specifically addressed, though as you suggest there are a number of variables.
Originally posted by Drunkenparrot
Perhaps there is some detail that was overlooked but after spending some time trying to reference the recent accusations in the petition with the data in the NTSB report it seems to me that no stone was left unturned and that there was sound reasoning behind the decision to dismiss the missile theory.