Heretic76 wrote:...Curious if you served in the Australian military at all?..
15 years in the reserve - RAE - "Royal Australian Engineers" which includes the field or combat engineers and construction engineers. No active service.
Heretic76 wrote:...I think we both know what the 'official story' is....
that is where the problem starts because the expression "Official Story" is used with untruthful effect - whether by people who are being deliberately dishonest or unable to focus on what they specifically mean. At one end of the spectrum it is used to include the technical issues - the big three where the "official" side has "No CD at WTC"; "It was that 757 at Pentagon and "No Shootdown at Shanksville". We then see accusations that anyone supporting the "Official Story" are government shills etc etc.
Put as simply as possible the range of issues which can potentially be included in the "Official Story" ranges from the Government statements explaining the terrorist involvement right across to explanations of WTC towers collapse.
That is not one story that can be "right" or "wrong" - it is at least dozens of separate events/issues each of which can stand alone as to "right' or "wrong" where some may be right whilst some may be wrong.
I see the terminology most often originating in a "truther side' claim which is at least partially false and where the claimant makes no distinction as to which bits of that story he is pushing. It is not possible to argue those claims without hundreds of words of disclaimer attempting to get rid of the innuendoes and inferences.
Heretic76 wrote:...That is really the essence of what we discuss, for indeed, a very elaborate story was told that day, largely by way of staged cell phone conversations and innuendo. Certainly the US President, however slowly he might have started that day, and however dumb he looked, had it all figured out by the end of the day. Not only was the story told, it has been repeated ad nauseam, for 10 years now...
(my emphasis) Ok, so by the "Official Story" you mean the explanation in the
very elaborate story was told that day. So "the Official Story", when you use the term, does not include the later explanations of the technical events at WTC, Pentagon and Shanksville. I have no problem with the idea that Bush et all massaged the message for political ends. How much and to what effect are matters for discussion and IMO have not been adequately pursued by the truth movement. Hence my repeated concern that leading truth movement advocates such as Gage and Jones in earlier days insist on linking their calls for a new investigation to the false technical claim of demolition at WTC. Keep them separate. I can go along with one. The other is nonsense.
Heretic76 wrote:...And reference "logic process", I wonder if you might address just how that process is influenced when its very premise and starting point is based upon the statements of an entity known to be quite mendacious?
So you don't start from doubtful premises. In discussing WTC collapse I have on occasion had to go right back to zero base and start with "Do you agree that the Twin Towers were standing on 9/10 and not standing on 9/12?" And one of the best truther side researchers I know declined to answer when I asked "Do you agree that the visible collapse of the twin towers started as a downward movement of the 'top block' above the impact and fire zone? - if you don't accept that please state when you think it started?"
I divide the 9/11 events and issues into two classes. The technical - essentially the big three technical questions and the subordinate aspects thereto AND all the rest which tends to be in the socio political domain. With the technical is is nearly always possible to be definitive - not so simple when dealing with political issues.
Heretic76 wrote:...As to the specifics, and regarding your comment that the 'exit hole' is just what one would expect, I would like your engineering side to explain to me how an alumium fuselage whose structural integrity was compromised sufficiently at the first millisecond to spew 6 foot sections backwards from the direction of travel, as shown by the nicely painted American Airlines piece on the front lawn of the Pentagon, how could that compromised fuselage suddenly acquire the properties of some sort of earth-boring drill so that it could then bore through however many 'rings' present, to then make such a neatly symmetrical exit hole?...
I explained it at some length on another forum - on the basis of the plane passing through several walls in succession -- red face department when I realised that the area it went through was not separated into rings.
Your comment "earth boring drill" suggests that you may have a concept of a rigid structure or device making the holes. Think of it a different way. The aircraft is moving mass. And relatively fragile in terms of the structural integrity giving it rigidity. The rigidity is not the key issue rather the energy of the moving mass of the parts. So as the plane hits the outer wall (and starts to disintegrate) what hits the wall is a concentrated mass of fuselage and undercarriage. At a distance either side a lesser mass of engines - one each side. And an even less mass stretched out linearly with wings and tail.
The mass of fuselage is either sufficient or not sufficient to break through the first wall. And, if it is sufficient there may still be some distribution effects. The energy at the outer limits of the fuselage may not be able to break through so the hole may be slightly smaller than the fuselage. Not so at Pentagon - I'm generalising a lot for the explanation.
Same story for the engines but lesser energy so if the wall is too strong the engines would bounce back. The engines actually went through the first wall at Pentagon - photo evidence.
Same storey for the wings but more so.
Now at the Pentagon the hole was a wide one - fuselage plus two engines and those knocked a big enough hole for most of the wing to pass through.
If the fuselage mass then strikes a second wall it is still advancing but with reduced energy and the advancing mass is a more or less cylindrical mess of debris. And the outer parts of the cylinder are easier to stop than the centre - more concentration of mass at the centre and focussed on less strength of wall.
So the hole through the second wall is smaller. Given successive walls the hole would tend to get smaller. The engines would run out of energy sooner than the fuselage.
So that is broadly the mechanics - and when I first gave it I thought the plane had gone through multiple walls. It actually only went through 2 walls and creamed a lot of columns in the space between them. And, of course, none of these claims of circular mean precise circles in reality.
And, at pentagon, the engines didn't make it through second wall but the remaining fuselage energy did.
Heretic76 wrote:...Further, why do we not have similar exit holes made by the much heavier (and fully retracted and enclosed at time of impact) steel landing gear? Why no exit holes for the huge and heavy and hard turbine engines?...
correct me if I'm wrong but the heavy bits of undercarriage on a 757 fold into the lower fuse? o it would merely add to the total mass of the central mess of fuselage. Most of the fuse mass seems to have been expended of energy and did not pass through the inner wall? And the engines had run out of energy - I dunno to what extent they were involved in damaging columns between the two walls.
Heretic76 wrote:...I will not push on the aerodynamic implications, for I know you would not appreciate the finer points.
Wrong for two reasons:
1) Aerodynamics is engineering dynamics. I may not have learned it as a specific topic but I am fully capable of understanding any bit of it that is relevant to the discussion; AND
2) At this stage I have not seen an argument which requires understanding of aerodynamics so the point is moot.