Hey Glen: Figure 17 on page 21 of the Ercoupe parts catalog has a pretty good breakdown of the baffling. Obviously numbers 30 through 35 are the inner cylinder baffling. I have found several installations with number 47 missing. #'s 13, 14, and 15 are the add-on baffles for the C-85 required by one of the prop installations. You will have to check the type certificate to find out which one. I do not have it in front of me. Lynn Nelsen
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