Posted on 01/26/2015 5:10:11 AM PST by big'ol_freeper
Gas laws say 1.2 PSI from the air cooling 25°F.
Some example links of various types of treatment:
Slow cooling, dry:
http://www.wcsh6.com/story/news/local/2015/01/22/deflategate-patriots-football-pressure-inflated/22174475/
Quick cooling, via water, possibly incompletely cooled.
https://www.facebook.com/PathfinderRegionalVocationalTechnicalHighSchool?fref=nf
Slow cooling while wet: 1.8 PSI
http://www.youtube.com/watch?v=CxsXFX3tDpg&feature=youtube_gdata_player
Gas laws also say that air warms up when it is compressed, or then cools when it is released into the ball. You’re making an assumption that the compressed air is at “room temperature” at the time the pressure is first checked in the ball. It could be either warmer, or cooler, depending on the type of compressor and supply air tank.
Sure. I’ve noted that elsewhere, though it is also limited by the proportion of gas put in there.
My previous thought experiment on the matter was suggesting that you started with 1 atm pressure (i.e. pretty flat ball) and added another 12.5 psi instantaneously. The result is hundreds of degrees C...with low thermal mass.
It would cool if they used a compressed gas cylinder.
So, that just adds to the possible natural variation. Taking a more moderate position that the balls would be just inflated a pound or two, and then not immediately submitted, there are more than enough other natural factors to account for the entire reported/rumored psi change.
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