Niin kuin jo aikaisemmin totesin, niin en todellakaan usko laskelmiin/tutkimuksiin missä esitetään yli 900 km/h törmäysnopeuksia ja sen takia kaivoin omasta mielestäni realistisemman tutkimuksen. Ohessa Eduardo Kauselin (MIT) laskelmat, jotka päätyvät minusta hyvinkin realistiseen noin 810 km/h olevaan törmäysnopeuteen.
http://web.mit.edu/civenv/wtc/PDFfiles/Chapter III Aircraft speed.pdf
The velocities listed in this table for the two WTC planes are in excellent agreement with flight data based on radar provided by the NTSC1. The radar speeds are basically 10% larger, a difference that could easily be explained by the higher altitude at which the aircraft may have remained visible to radar and the probable speedup caused by the descent. Indeed, during their final approach, the airplanes - whose transponders had been disabled - were flying as low as some 300m (1000 ft) above the ground (i.e. the height of impact), an altitude that is barely above the rooftops of the skyscrapers in lower Manhattan, so radar is likely to have been blind to them. By contrast, the estimates given herein are based on the last mile of flight prior to collision.
http://web.mit.edu/civenv/wtc/PDFfiles/Chapter III Aircraft speed.pdf
The velocities listed in this table for the two WTC planes are in excellent agreement with flight data based on radar provided by the NTSC1. The radar speeds are basically 10% larger, a difference that could easily be explained by the higher altitude at which the aircraft may have remained visible to radar and the probable speedup caused by the descent. Indeed, during their final approach, the airplanes - whose transponders had been disabled - were flying as low as some 300m (1000 ft) above the ground (i.e. the height of impact), an altitude that is barely above the rooftops of the skyscrapers in lower Manhattan, so radar is likely to have been blind to them. By contrast, the estimates given herein are based on the last mile of flight prior to collision.