Roma 1987, Seoul 1988, Athens 1997 and Helsinki 2005 biomechanical analyses were done by ex-FRG team with colaboration with Czech and Finnish teams. Tokyo 1991 was done by the Japanese Fed. They were all working for IAAF. Sevilla 1999 was done by a Spanish team.
The ex-GDR German team did the researches in Stuttgart 1993 and Munich 2002. The 1993 one was comandited by IAAF which paied the biomechanical team so the results was widely spread. The 2002 one was by comandited EAA but they didn’t paied them so the results were kept secret
All these different team use different devises and systems, the most accurate is the one used by ex-GDR because the splits are taken with syncronised system with gun/photo-finish (thus the intermediate times are as accurate as the finish time, unlike other which use cameras and start with light of the gun, it doesn’t give accurate results, some others use laser gun but the difference with camera is about 0.01 to 0.02). The problem of accuracy in these biomechanical studies is detailed here http://www.charliefrancis.com/commu...p?t=2343&page=2
Hopefully, the ex-GDR team will receive the command from IAAF for the Grand Prix Final in Stuttgart in September 2006.
Back to the question re-Greene top speed, at World Champs 1997 and 1999, Greene won in 9.86 and 9.80, and the biomechanical teams found 0.85 as his fastest 10m section. Forget all the non-accurate forum posts which give him 0.82 or 0.83 for other races. Ben was given 0.83 in Seoul like Carl Lewis. The fastest speed ever recorded was in Tokyo quarter final 0.80 by Lewis but the wind was blowing hard on a super fast track.
