[kach22i]

The LFRD method for calculating steel members was replaced with another method a few years after I got out of college.

In other words, this is an example where a standard of science was improved upon and replaced.

Many such examples outside of architecture and structural engineering exist.

In my reading today on this topic I picked up that standard aerodynamic theory and calculations and even CFD can and will be improved upon as the quest for lower drag aircraft continues.

In short, science marches on.

I can see both discarding the past and building on the past as needed.

We in this forum are not in pursuit of that last 2-percent of perfection, so rules of thumbs and templates have a role in my opinion.

I do wish there was a template or more illuminative guide for UPLIFT though.

The extra 50 lbs of down-force I seat of the pants guessed my S10 pickup truck roof wing gives allows me to not use 4WD in heavy rain and still take wide bending curves on Pontiac Trail at 50 mph at night. This means I save gas and get to my destination on time.

50 lbs may not seem like a lot, but it is enough to make a difference in my comfort zone.