sicam
07-25-2011, 06:53 AM
I am sure you guys have seen it all. Here is my uh oh moment of the day.
It was hot out, ... No, I mean really hot. Around 99 F with a heat index approaching 112 F. I put the bike in the shade under the tree and would work on it for about 20 minutes then go inside. I was working on the bottom of it so I put it up into the air (Front end up and balanced on rear bar. To insure gas didn't leak out I closed the tank vent and the gas line shutoff. Then it started to storm so I set the bike down and went inside. The storm was refreshing, it rained and the temperature outside dropped at least 15 degrees. :doh:
Went I went outside and looked at the bike, the gas tank has started to suck in on one side. The air in the tank - remember the equation pv=nRt. Yep, n and R stayed constant but T dropped by 15. So, who do you think gave p or v? p gave a little, the tank was now under vacuum and v gave a little, the side of the tank flexed in.
Long story short, never close both shutoffs at the same time.
Good news, the same equation works when air pressure is put into the tank. :headbang:
It was hot out, ... No, I mean really hot. Around 99 F with a heat index approaching 112 F. I put the bike in the shade under the tree and would work on it for about 20 minutes then go inside. I was working on the bottom of it so I put it up into the air (Front end up and balanced on rear bar. To insure gas didn't leak out I closed the tank vent and the gas line shutoff. Then it started to storm so I set the bike down and went inside. The storm was refreshing, it rained and the temperature outside dropped at least 15 degrees. :doh:
Went I went outside and looked at the bike, the gas tank has started to suck in on one side. The air in the tank - remember the equation pv=nRt. Yep, n and R stayed constant but T dropped by 15. So, who do you think gave p or v? p gave a little, the tank was now under vacuum and v gave a little, the side of the tank flexed in.
Long story short, never close both shutoffs at the same time.
Good news, the same equation works when air pressure is put into the tank. :headbang: