The plane name sounds familiar. In 1950, I don't know if they had started their "Timely Plans Service" as yet. I think that is what they called it. A lot of the designs has full size parts shown, and you needed to use your high school drafting skills to enlarge the rest! A lot easier with Kinkos these days!
Does this model show some kind of light system on it? I'll have to dig out the Morris book and find out.
Type at you later,
Dan McEntee
PS to Add: YES! It is in that issue, October 1950, but it is in an article called "Stunt By Night" by Don McGovern and the table of contents mentions the model Eclipse. I think I made copies of that article for Jim Lee or someone else looking for it for an obscure OTS model.