Peter Wheeler flies aboard UA4010 from Newark NY to Louisville KY.
The plane: A well-used Embraer RJ140, a narrow-bodied, 50-seat twin jet, of which there more than 100 of these "Brazilian sky taxis" in the UA Express jet fleet.
Class: One only, Economy.
Seat: 9A: B is the aisle while C and D are within reach, so not a lot of room.
On time: Newark International's runway rush hour kept moving and we left only 10 minutes late. We made up time, and allowing for the one-hour time zone change , arrived 10 minutes early at Louisville International to find no ground handlers and no gate open.