[Properstyle]

Originally Posted by Green-Eggs

The VBOX doesn't measure slope. Slope is a simple math calculation that was probably taught in math at about 4th grade. If Draggy were calculating slope differently, then I'd be asking what else is Draggy doing differently that might also not be valid?

Regarding the 3% vs. 1% difference: that was debated, discussed, and settled years ago at 6speedonline. For standards, all sites use the 6speed standard of 3%, not the Draggy version of 1%. Accepting a 3% slope from Draggy would be up to DLSJ5 -- if he wants to use the 6speed standard.

If you have a vbox and want to know how 3% vs. 1% affects the results, you can submit your files to perfdb.org, select advanced options, and enable "Correct the timestamps based on slope rise and fall." I think the difference is far less than you think. In a 7-second 60-130, a typical distance is 1000 ft. A 1% slope is only a 10-foot drop over 1000 feet. A 3% slope is only a 30-foot drop over 1000 feet. 30-feet over a 1000-foot run is NOT a steep downhill. If you were standing on the ground at the start, you probably wouldn't even see it.

The difference between no slope and 3 percent is over half a second. If that's doesn't seem like a problem when measuring ability to complete times something is wrong. The faster you go the more that negative slope of 3 percent actually assist your run. I don't have to submit files to see that as I've visual watched it happen. When I broke in to the 6s 60-130 I ran a 6.9 no slope. For shits and giggles on the same road just 1/4 mile earlier at the same air intake them during the same night. I hit the down hill that was 2.4 slope and cut a 6.4. Why people seem to think that's a small amount I have no clue. If you were seeing a 11.0 and 10.5 run down a drag strip the difference is multiple car lengths. If you would like I'll go take a photo and video of that road you can with out question see difference in height even at night. But as said not my thread I won't belabor the point.