The traditional Eye in the Sky.This version of the Eye in the Sky is what I consider to be traditional because I have used it many times. It is reliable, simple to build and fly, and takes great pictures. It used a 3" body tube with a traditional payload section for the camera, and the electronics and battery are mounted in the payload section’s coupler. The activation switches are also located in the payload section’s coupler, and activate the timing circuit at separation.