Quote:
Originally Posted by darrylrobida
3mpg is an estimate. That figure is for high speed freeway driveing. As to how I measure MPG. I've tried computers and Mpguino and have come to a conclusion.
I will use a graduated cylinder for gas volume and a calibrated rear trailing bicycle wheel.
Also, why doesn't anybody blog about using a manometer to measure vacuum behind the vehicle?
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The vehicles near wake can be an extremely complex blend of eddies,full-blown turbulence,and upper and lower corner vortices.
You would need to do a very accurate 10 or 20-position pitot-tube traverse of the near wake,average all the pressures,then see if any one specific sampling position happened to represent the mean average pressure.Then from there on out,do all your sampling from only that location.
Short of that,we'd be guessing as to the actual wake conditions back there.