Billions are flowing into commercial terminals, but general aviation airports — the launchpads for electric aircraft and advanced air mobility — remain underprepared.

The Grissom Air Museum in Peru, Indiana isn’t just a collection of old planes – it’s a time machine disguised as a museum, where visitors can walk among the giants that once ruled the skies.

By far the best American fighter of 1939, and by far the shiniest aircraft on this list, the Curtiss Hawk 75A scored the ...