mine was the A-Ray - i think it was designed by Lou Andrews. I built it myself, with some advice from the guys in the CORKS out of Columbus, Ohio. It had a Kraft 4 channel digital proportional radio- one of the early versions, as this in about 1973 a few years after digital proportional radios came into use. it had an orange colored case. the engine was a .35 - not sure which brand- maybe an enya? it flew very well - but then from my very limited knowledge at that time ANYTHING would seem to fly well

. but I didn't crash it!!
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