The Delta Flyer is one of Voyager’s later shuttles, designed by Tom Paris. It was first introduced into the show on episode number 97 – Extreme Risk. It was originally introduced with the intention of retrieving one of Voyager’s probes from the depths of a gas giant. The normal shuttles could not handle the pressure, and another alien race was after the probe as compensation for their lost crew men (for further description, see episode description in Season 5 noteables).  So, when the crew had a good, old fashioned space race on their hands, the Delta Flyer was just right for the job.