Using modified 'emergency' vents on either side of the troublesome RB10 to avoid overheating, the car managed its longest stint on the track in pre-season following multiple problems with its Renault-powered engine in the previous tests in Jerez and Bahrain.
Australian Ricciardo managed 66 laps in total, including a 20-lap burst late on, and turned in the third fastest time of the day with one minute 35.743 seconds.
"This morning it was important to have the race crew here to do the pit stops, as they haven't had the chance to get to grips with the car yet, so we didn't do that many laps in the morning," Ricciardo told the Red Bull website.
"However, in the afternoon we did some good stuff. We had a go on the soft tyre, which was nice, to see how the car responds with a bit more grip. We also did one long run at the end, which was very important, just to see how the car is behaving with the tyres," he added.
"A big improvement everywhere over yesterday and a much more optimistic outlook now I think. We still have a lot to learn and understand, but we're making progress and the past two days have been a big step in the right direction," he said.
Ricciardo will be replaced by four-time world champion Sebastian Vettel for the final two days of testing.


Latest News from Sports News Desk