Would you be in favor of this new factor equation?
Patrick Hale said:I have curve fit the NHRA altitude correction factors for the "ET Convert to Altitude" column from NHRA.com. This curve fit is very close.
Factor = 1 + (Alt ^ 1.241) / 737,200
The current NHRA system uses sea level as the base for this calculation. A few years ago they decided not to factor tracks below 1200 feet (I think) in altitude. I used to race B/ED, F/ED, C/ED and K/AA in Div 7 and am well aware of the problem with the altitude factors.
What needs to be done is include the 1200 feet cut-off (or whatever cut-off you like) for no factor tracks as follows:
New Factor = 1 + ((Alt - 1200) ^ 1.241) / 737,200
This fixes the problem from the math perspective. It uses the cut-off altitude as the base - not sea level. So now, at 1200 feet, the factor is 1.0. That's the real problem!
For example, the "Old Factor" for Boise was 1.0245 and the "New Factor" would be 1.0119. And instead of B/AA going from 7.72 to 7.91 it would have gone to only 7.81.
Another example, for Denver - the "Old Factor" was 1.0633 and the "New Factor" would be 1.0476. Instead of B/AA going from 7.72 to 8.21, it would only go to 8.09.