05-14-2019, 09:33 AM
(05-14-2019, 08:51 AM)The ferret_imp Wrote: Ive often wondered how capacity of a tank is determined. By laser, by mathematics, full to the top with the bottom plugged and no fuel pump, or fuel pump intact filled to bottom of neck and then poured our siphoned out?
That's a good question. I think the most accurate way would be to fill the tank as it sits on the completed motorcycle and then drain the fuel through the line at the bottom. This would not count unusable fuel that wouldn't make it to the outlet, due to tank shape or orientation.
In aviation our plane specs include figures for total fuel (to account for weight) and usable fuel (to account for how far you can go). Some light planes can have as much as 3 gallons of fuel per tank that is considered unusable, due to tank shape and orientation.