From
airmailpioneers.com comes this 1920 photo of a Martin twin-engine mail plane that did a "nose-over" at old
Heller Field in North Newark. The caption to this photo noted that the pilot, Walter Stevens, was "slightly injured. This field was considered the most miserable of air mail fields and abandoned after a year because of dangerous approaches." Heller Field may have been named for one (or both) of the Heller Brothers, who ran a big tool-making business on Mt. Prospect Avenue.
I've been trying to figure out exactly where Heller Field was. From the above photo it looks like it was somewhere near the park. I checked a couple maps. One was from 1904:
The other was from a few years later, after "Freedonia Avenue" (which had started out as Old Bloomfield Road) had been renamed Heller Parkway:
Can't quite figure out where that airfield was. Anyway, Newark Airport soon replaced it.