Hellbound,
First I want to say that I appreciate your criticism. Its is hard to find people you still wish to address my argument head on.
My argument:
(1) [Upon impact] Elevator cables are severed + jet fuel droplets and/or jet fuel fireball descend shaft
(2) Car 50 falls approx. 17 floors taking no more than 5s to reach B1
(3) Jet fuel droplets and/or jet fuel fireball descend 95 floors taking approx. 30s and 15s respectively
(4) The first basement explosion occured below car 50 and before it reached B1
Conclusion: whatever exploded below car 50 and before it reached B1 could not POSSIBLY have been caused by fuel droplets and/or jet fuel fireball.
If I understand your argument correctly you are saying that the freight elevator car took longer than 5 seconds to reach B1, that the emergency brakes would have slowed her descent. This is a logical counter argument, if you cant speed up the descent of fuel droplets (9m/s) or the jet fuel fireball (27m/s) then maybe we can slow down the descent of the elevator.
You write:
The elevator car should have had emergency brakes. Can't speak to that, but do you have details of the type of car used, and the safety measures included?
Freight elevator cars in the world trade center were gearless traction machines with a max speed of roughly 10m/s [1].
There is only two reasons that the emergency braking system will be activated mechanically, the first is if there is no electricity. But we know that the elevators in world trade center still had electricity [2] the second reason is if the elevator is over the speed limit. The governor is a mechanical speed control mechanism. It is a wire rope driven centrifugal device used to stop and hold the movement of the driving rope. This intiates the activation of the car safety device. It opens a switch [overspeed governor switch], which cuts off power to the drive motor and brake if the car travels at a preset overspeed (freefall or 20% over its rated nameplate speed) in the down direction [3]. The reason, in my opinion, why the emergency brakes worked for the freight elevator car and not for others is because the plane impact may not have managed to sever the all important governor cable which as explained above activates the emergency brake jaws which grip the guide rails and slow the car to a stop [4].
1.
http://en.wikipedia.org/wiki/Elevator
2.
http://www.usatoday.com/news/sept11/2002-09-04-elevator-usat_x.htm
3.
http://www.hkaconsulting.com/Pages/Glossary.html
4.
http://www.answers.com/topic/elevator
The car would likely have emergency brakes. So the car velocity would be less than that of the fuel.
Wrong. Fuel droplets have an approximate terminal velocity of 10m/s. A freight elevator descending normally would also have a speed of 10m/s. So even if the elevator cables had not have been cut, fuel droplets could not have caught up and passed the freight elevator. But we know that the cables were cut, this is why the freight elevator was heard “falling” by Phillip Morelli, and why the operator of the freight elevator Arturo Griffith was saying to himself “Oh, God, Oh, God, I’m going to die”. the fact that the emergency brakes kicked in further confirms that overspeed was reached.
So how long was car 50 falling?
From Griffiths testimony we learn that their elevator ascended for 5-7 seconds [5]. But let us use the most generous estimation, that being 7 seconds. A freight elevator ascending 10m/s for 7s will reach 70m. Each floor is 3.8m so it is fair to say that the freight elevator reached about the 18th floor when the plane impacted the building. From Griffith’s testimony we also learn that the elevator fell at least 15-16 floors before the emergency brakes caught. That fits in nicely with the above estimation of 18 floors. It is difficult to say however exactly how long it took car 50 to fall 18 floors but given that a freight elevator would descend 18 floors in roughly 7 seconds it is safe to say that a freight elevator, with cables cut, would take no longer than 5 seconds.
5.
http://911stories.googlepages.com/insidethenorthtower:witnessaccounts,floo2
The question then is how could fuel droplets and/or jet fuel fireball descending 95 floors pass this elevator?
Answer: it couldnt.
Implication: fuel droplets and/or jet fuel fireball was not responsible for the devastation in the basement
Question: then what was?
And I'd say you need to research something besides testimony. Testimony is well and good, but your failing seems to be in the physical realm.
I dont need testimony to know that when the plane crashed into the building that cables were cut, fuel fell down the shafts and elevators fell. Thats just common sense.
If the basement explosion occured after car 50 reached B1 dont you think they would notice the intoxicating fumes as they passed over the car? A human can detect kerosene as little as 1ppm but you dont think they would be overcome by 7000ppm to 50000ppm?
Dont you think they would have noticed a massive jet fuel deflagration just below their car? You do know that shaft 50, 6 + 7 were the ONLY route the fuel could have travelled down to reach the basement from the impact zone? Again to establish the fact that the basement explosion occured before car 50 reached B1 simply requires the application of some common sense.
To establish the fact the something-actually-did-explode in the basement are you really willing to discard 20 or so witnesses? So you see my firend my argument does not rest so much on testimony but more on the physical realm than you give it credit for. And when the physical realm and testimony corroborate one another your argument should be taken seriously and not simply ignored.
You are not familiar with the characteristics of explosives, you seem to be at a loss on the construction of elevators, and frankly, you've got no physical evidence at all for your viewpoint.
True i am not familiar with explosives and if you are apparently more familar with the construction of elevators then dont you find it odd that you were asking me for information concerning the emergency brake system? As for the physical evidence, given that jet fuel cannot POSSIBLY explain the damage that did occur in the basement what else do you propose can possibly explain it?
So go learn a bit of science, instead of making unsupported claims that are counter-indicated by your own "evidence". Anyone can do that.
Why dont you go learn some common sense. But heres a prediction, eventhough you will be unable to refute my argument with any intelligent or logical counter you will still hold onto your DEBUNKED belief and join the growing list of jrefers including Mackey, Norseman, Gumboot, Dave Rogers, Funk de Fino etc
peace