The ARTS 2 has a acceloramtor and the ability to log at 200hz. Afternoon the flight download the log, then input flight data: rocket specs, motor specs, and the software gives you the motor analysis, CD calculator vs Mach number and a flight graph with baro and acceloramtor altitude.
It also has the ability to log GPS data, so I plan to figure that out this winter to get the flight path as well.
The F39-9t was about 17.5% short on impulse, thus the 17.5% reduction in altitude, I thought it was going to go 1750'.
The Ozark research company is not longer around, I picked 2 of these up used, Loki Research has the information up on there website still for support.
~John