Driver Bruno Senna
Chassis / engine FW34-02 / RS27-5341/1
Location Circuit de Catalunya, Barcelona 4.655km
Objectives Aero tests and race simulation
Weather Dry and sunny in the morning, cloudy with some rain in the afternoon
Ambient & track temps 19ºC / 23ºC

Day three of the Williams F1 teams Barcelona test and it was Bruno Senna behind the wheel. Bruno would complete a handful of untimed laps as part of his installation laps. After a short break he was back out and setting times in the 1m:24s and 1m:25s, pitting again after completing six timed laps, running on the hard tyre. One lap was a 1m:24.256 followed by a 1m:24.058 to see him quickest at this time. So far he had completed thirteen laps in total. After a twenty minute break Bruno would come out for one timed lap, 1m:28.758 before pitting again. After a ten minute break Bruno was again out on the track and on his final lap prior to pitting would set a 1m:23.244. His time was set on the hard tyre.

A further ten minutes and Bruno would return setting two timed laps, the quickest of the two been a 1m:23.264. Bruno had completed twenty five laps with two hours of the session run and was currently second in the overall times behind Massa who had set a 1m:22.413 running on the super soft tyre. Bruno's next run would be a quick two laps with both of his laps in the 1m:23s. He would pit after a ten minute stop he was back out this time running on the super softs. His use of these tyres would be reflected in his laps times when he would set a 1m:22.480 on his first lap. He would complete another lap, 1m:25.508, before pitting again. He would return again running on the super soft tyre appearing to be practicing a qualifying run. His time would be a 1m:22.624, before pitting after one timed lap. This would be the last that Bruno would run prior to the lunch time break.

As the teams completed their morning runs it would be Perez who was fastest with a 1m:22.094 from Ricciardo, Massa, Di Resta, and Bruno now fifth. Perez's time was set on the soft tyre as other teams looked at qualifying runs. With the lunch break completed
Bruno was back out, running on soft tyres, on a longer run. His times would be in the 1m:30s and 1m:31s. He would complete eleven laps with his later times in the 1m:32s. He would take to the pit lane but would continue his run setting an initial time of 1m:29.943 followed by times in the 1m:30s. After completing a further fourteen laps Bruno's times would drop off into the 1m:31s and 1m:34s. He had completed sixty eight laps at this time. He would pit and take on new tyres which would see his times would drop back into the 1m:28s and then the 1m:29s. Bruno was not the only one doing a longer run with Di Resta, Perez, and Ricciardo all out on the track.

Bruno would continue his run setting times in the 1m:29s for six laps but his times would drop off into the 1m:30s. As Bruno completed further laps his times would fall off into the 1m:31s. He had completed eight eight laps at this point. Bruno would pit again returning to the track running on what was believed to be mediums despite the fact that the tyres had no markings. His times would fall back down to the 1m:27s for the next seven laps but in his final two laps his times would fall to the 1m:32s and 1m:31s. With one hundred laps completed Bruno would pit seeing him end this long run. But conditions would change with light rain starting to fall. After a fifteen minute stop in his pit Bruno would come back out with his times initially in the 1m:44s but they would drop into the 1m:43s. With forty five minutes remaining not a lot would be learnt given the conditions. Bruno's times would rise to now be in the 1m:51s followed by a lap in the 1m:40s.

But the session would be red flagged and the cause would be Bruno stopping at Turn 10. His car would be returned to the pits by the usual flatbed truck. It would be later confirmed that Bruno's stoppage was caused by an electrical problem. of this Bruno said: "We had a small issue with the electronics again. The car has been running its fair share of kilometres, and sometimes one or two systems decide they've had enough. It was a small issue, nothing to worry about."

Mark Gillan, Chief Operations Engineer: We had a productive day's testing today, with Bruno completing 111 laps without issue. We concentrated on aerodynamic testing this morning prior to moving onto a race simulation. At the end of the race simulation, it
started to rain and we reverted from dry tyres on to intermediates.

Bruno Senna: Today was a very good day. We completed some runs on lower fuel, which I hadn’t done before, using all the different tyre compounds. I was then able to do a full race simulation this afternoon, to learn more about the car and tyres in a race situation. We have a lot of valuable information to look at now, which will enable us to improve for next time. Unfortunately we had to cut our race simulation a bit short due to the rain, however we still met all our objectives for the day.

The Williams F1 Team will be back on track tomorrow, Sunday 4 March, with Bruno Senna driving in the morning session and Pastor Maldonado driving the afternoon session for the final day of pre-season testing.

DRIVER      	 TEAM 		  	TIME       BEST / TOTAL
						   LAPS
1 S Perez 	 Sauber F1 Team 	1:22.094   42 / 113
2 J Button 	 McLaren Mercedes 	1:22.103   33 / 44
3 D Ricciardo 	 Toro Rosso 		1:22.155   46 / 131
4 F Massa 	 Ferrari 		1:22.413   21 / 122
5 P Di Resta 	 Sahara Force India 	1:22.446   44 / 108
6 B Senna 	 Williams F1 Team 	1:22.480   31 / 111
7 H Kovalainen 	 Caterham F1 Team 	1:22.630   43 / 64
8 M Webber 	 Red Bull Racing 	1:22.662   38 / 70
9 N Rosberg 	 Mercedes 		1:22.932   50 / 129
10 K Raikkonen 	 Lotus F1 Team 		1:25.379   19 / 43