FYI -- from Bob Kravitz's Twitter:
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jasail's Ballghazi Precis/Primerwith amendments:
1) Each team provides the NFL with game balls for use during the game and the NFL requires the balls to be inflated between 12.5 - 13.5 psi and weigh between 14-15 ounces.[/size]
2) 2 hours prior to the start of the game, NFL refs are required to inspect the psi and weight of game balls provided by each team. If the balls provided do not meet these specifications, then they will be adjusted by the refs.[/size]
3) Once the balls are returned to the teams, they are put in ball bags on each sideline but are not guarded by NFL personnel. Team ball boys will provide the refs with new balls at their request.[/size]
4) League sources have confirmed that Walt Anderson and crew inspected and approved all balls provided by the Colts and Patriots 2hrs and 15 min prior to kick off and returned them to their respective teams.[/size]
5) ESPN Radio reports that Walt Anderson and crew inspected the Patriots balls again at half-time and those that were under-inflated were re-inflated and put back into play.[/size]
6) ESPN Radio reports that Walt Anderson and crew then inspected the Patriots balls again after the game. No details have been released regarding the results of these tests.[/size]
7) Chris Mortenson reports that 11/12 of the balls provided by the Patriots were found to be 2 psi below the NFL specifications. It is uncertain whether this report is with regards to the balls tested at half-time, the end of the game or some combination thereof. [/size]
8) Adam Schefter reports [/size](Reported by Mortensenjust let it go.)[/size] the Colts had concerns about the level to which the Patriots inflated their balls following the November meeting between the teams and they raised this concern to the NFL prior to the AFC Championship Game.[/size]
9) WSCH of Portland showed their math in a pv=nrt equation to show that temperature change from time of measurement to game time could result in a potential reduction of PSI by 0.4. This presumed that the air inside the ball was at 68 degrees at time of initial measurement and then 51 degrees at game time. Therefore, it is unlikely that the change in pressure is solely the result of change in temperature.[/size]
This was identified as mistaken by several posters, most notably citing SumnerH here, as incorrectly using gauge pressure instead of absolute pressure; revised caluclations suggest a 1 to 1.5 psi loss would be possible given prevailing temperatures.[/size]
More updates:
Thank you
- The Management
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
jasail's Ballghazi Precis/Primerwith amendments:
1) Each team provides the NFL with game balls for use during the game and the NFL requires the balls to be inflated between 12.5 - 13.5 psi and weigh between 14-15 ounces.[/size]
2) 2 hours prior to the start of the game, NFL refs are required to inspect the psi and weight of game balls provided by each team. If the balls provided do not meet these specifications, then they will be adjusted by the refs.[/size]
3) Once the balls are returned to the teams, they are put in ball bags on each sideline but are not guarded by NFL personnel. Team ball boys will provide the refs with new balls at their request.[/size]
4) League sources have confirmed that Walt Anderson and crew inspected and approved all balls provided by the Colts and Patriots 2hrs and 15 min prior to kick off and returned them to their respective teams.[/size]
5) ESPN Radio reports that Walt Anderson and crew inspected the Patriots balls again at half-time and those that were under-inflated were re-inflated and put back into play.[/size]
6) ESPN Radio reports that Walt Anderson and crew then inspected the Patriots balls again after the game. No details have been released regarding the results of these tests.[/size]
7) Chris Mortenson reports that 11/12 of the balls provided by the Patriots were found to be 2 psi below the NFL specifications. It is uncertain whether this report is with regards to the balls tested at half-time, the end of the game or some combination thereof. [/size]
8) Adam Schefter reports [/size](Reported by Mortensenjust let it go.)[/size] the Colts had concerns about the level to which the Patriots inflated their balls following the November meeting between the teams and they raised this concern to the NFL prior to the AFC Championship Game.[/size]
9) WSCH of Portland showed their math in a pv=nrt equation to show that temperature change from time of measurement to game time could result in a potential reduction of PSI by 0.4. This presumed that the air inside the ball was at 68 degrees at time of initial measurement and then 51 degrees at game time. Therefore, it is unlikely that the change in pressure is solely the result of change in temperature.[/size]
This was identified as mistaken by several posters, most notably citing SumnerH here, as incorrectly using gauge pressure instead of absolute pressure; revised caluclations suggest a 1 to 1.5 psi loss would be possible given prevailing temperatures.[/size]
More updates:
- 01/24/15: Full video of BB conference "aka "Roasting of Tom E. Curran": http://www.patriots.com/media-center/videos/Belichick-124-We-feel-like-we-followed-the-rules/d607eb23-2f67-4da5-aedc-b8bfba8d4c11
Thank you
- The Management
