The assumption is the energy released from farting = 280HP and MPH has nothing to do with it. Also a 280HP engine is measuring the output, thermal energy is easily 3x that.
So a better way to think about it is BTU / seconds * (time) = BTU of an A bomb. If you assume at it's peak a high end fart releases 10x the daily average per second you come to vary different numbers. Basically divide his number by (10 * 60 * 60 * 24) and you get a little over 2 years.
PS: His "average" fart has the energy equivalent of ~9% methane but it's moving a lot faster than 30MPH and it's at more than 1atm (speed without pressure is meaningless).
So a better way to think about it is BTU / seconds * (time) = BTU of an A bomb. If you assume at it's peak a high end fart releases 10x the daily average per second you come to vary different numbers. Basically divide his number by (10 * 60 * 60 * 24) and you get a little over 2 years.
PS: His "average" fart has the energy equivalent of ~9% methane but it's moving a lot faster than 30MPH and it's at more than 1atm (speed without pressure is meaningless).