The 'natural pressure change' argument is easy to explore. The formula is simple:
P1/T1 = P2/T2.
Lets take the very outer temperature limits of plausibility, say it was 75d F when they filled them, and 33dF when they tested (you have to change F to Kelvin to work this formula).
12.5PSI / 297K = X / 274K
Solve for X = 11.5 PSI
So even if the temp dropped farther than we know it dropped, at most you would lose 1 pound per square inch of pressure.
In order to lose 2PSI, the temperature the balls were filled at would have had to have been 127d F.
Apparently not that easy as we are now 1400+ posts in and people are still calculating this wrong. The equation is P1/T1 = P2/T2 rearrange the equation to solve for T2 so we get T2 = P2/P1*T1. All units of measure MUST be measured in absolute . For pressure you need to add the atmospheric pressure (14.7 psi) to the pressure inside the ball. The temps need to be in absolute also so either in Kelvin (C + 273) or Rankine (F + 459).
So your example to find a 2 psi drop works out to:
P1 = 12.5 + 14.7 = 27.2
P2 = 10.5 + 14.7 = 25.2
T1 = 75 + 459 = 534
T2 = (25.2/27.2) * 534 = 494 degrees rankine subtract 459 to convert back to F = 35
So the change in temperature is 75 - 35 = 40 degrees for a 2 psi drop in pressure in the ball.
Its not just posters getting this wrong its actual people in the media putting out this foolishness. Felger and Mazz on 98.5 were talking about an 87 degree temperature swing required to get the 2 psi change in the ball.
atmospheric pressure (14.7 psi) can change depending on the weather, no? Foxboro went from cold and dry to wet and foggy that day..
Also, if the Patriots (Brady) wanted a softer ball, the easiest way would be to inflate the balls with hot air at time of inspection.
They meet the minimum psi then quickly lose psi after cooling off outside. Not cheating.
Xwrong.
it IS cheating.the colts balls were not off by any weight whatsoever...so how is it that just the Patriots balls , ALL 12 of them, were off by 2+ lbs,while the Colts balls were not off one bit?
answer: Bellichick and Brady cheated. where there's smoke there's fire.you backing the wrong people here.the NFL is goingto come down hard on BB,he'll get suspended for the SB, huge fine , loss of draft picks, and suspension for 4+ games next season.it's THAT serious.not a preseason game, not week 1, but the AFC Championship game..now the circus turns to the SB..he won't make the trip to Az..they'll let him get the team prepped till sunday,and annouce it then,that he's suspended.
THEY CHEATED.
what's so hard to understand here?
and if you think Brady didn't know about it,you're nuts.he was in on the gig.check his laugh at that radio show the other day,when asked about it.his obnoxious arrogant laughter tells it all.would love to have a body language expert sit in on that conversation..I'm sure there were telltale signs ..
also,if you think Bobby Kraft wasn't in on the gig, I have a bridge in Brooklyn to sell ya..
other owners are probably clamoring that the NFL come down hard on this guy, BB, who already was caught cheating,and now is again.
and those of you who don't think he should be suspended, they banned Sean Payton for a full year for Bountygate..and his DC was out for 2 years..thats for putting money on injuries made to opposing players.actually altering the game and its parts - deflating balls - is even WORSE...
the mdeia is going to make this SB a circus, it could affect sponsors, etc..the integrity of the game has been compromised,yet,again,by Bill Bellichick and Tommy Brady.
they're both FRAUDS, and this will only further cement the idea that BB doesn't sniff the HOF and that Brady gets an asterisk..
ladies and gentlemen, meet the new Sammy Sosa and Mark McGwire..