Richard Nakka's Experimental Rocketry Web Site

PHOTO 87-- Flight C-31 : September 11, 1983

A view of the "back" side of the electronics module (which employed wire-wrapping rather than PC/soldering). The device in the middle of the photo is the ascent timer/recorder -- made from a gutted chronograph wristwatch (cheap one!). Easily reworked to suit the task, it was "started" by a mercury switch at burnout (due to deceleration), and "stopped" by the closing of the air-speed switch as the rocket slowed near the peak of trajectory.
The black cord is the parachute attachment cable, which consisted of a plastic wapped high-tensile steel cable...

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