Jolly Logic

Jolly Logic's AltimeterOne is a rechargeable digital altimeter that reports the peak altitude of your rocket's flight on its LCD display....

Jolly Logic's AltimeterTwo is a rechargeable digital altimeter for model rockets. The AltimeterTwo analyzes and reports flight altitude,...

This kit provides replacements for the pins, bands, and tethers that came with your original Chute Release. 2 pins 2 tethers 10 small bands 5 large...