There are 3 Engineering & Research 415-G aircraft on the U.S. registry that TailWiki has a page for. Every one is built from the public FAA record — year, serial, engine, home base, and registration history — and owners and pilots add photos, trips, and stories on top.
N94415
1950 Engineering & Research 415-G
Kingsville, OH
N94432
1950 Engineering & Research 415-G
Wilmington, DE
N99122
Engineering & Research 415-G
Canfield, OH