I use the bathroom scale and the 2x6 method to weigh my streetrods. I refined it by making pivots for the lift end and where the scale pushes on, and the actual load carring point. This gives quite accurate results. I think friction in the pivots is the biggest area. I just used 1/2 inch bolts right onthe wood. It's a simple calculation.
As for Sporqster's design, it will probably work.
As noted any air in the cylinder will cause problems. Also any side loads will too. But I think it's ok.
I think I would make spacers for the other wheels so the whole system is the same height when weighing. I did this with my 2x6 system so I could check each wheel.
Enerpac makes relatively flat cylinders that could be used directly with only a plate welded on the cylinder end to spread the load against the tire. You could use their hand pump with a gage and calculate a scale weight. |