I talked to Racepak about a Sportsman Data Recorder for land speed by adding a wheel sensor and a wheel turn-count algorithm tied to roll-out distance. The output could be graphed as a function of speed vs. distance for the 1/8, 1/4, 1/2 mile, or any distance of interest. They said their Sportsman package could be configured this way at some extra charge. Racepak also has a speed vs. distance GPS unit.
Shown is a GPS speedometer I had built for LSR as a less costly means of gathering some data. It provides 1/4-mile speed, which is quite useful in light of drag racing speeds. Of lesser interest, the speedometer also gives 0-60-mph seconds and 1/4 E.T.
John.