Caterham's Alexander Rossi turned pacesetter on a wet second day of post-season GP2 testing at Barcelona.
An early morning deluge severely restricted running, and it wasn't until the afternoon, when the rain had finally abated, that serious times began to be posted.
It was Rossi who ended up top of the pile, the American working his way down to a 1m31.173s - enough to put him almost four tenths clear of the field but still way over 1s slower than yesterday's benchmark.
This year's Auto GP champion Adrian Quaife-Hobbs ended the day second fastest, having switched from Rapax to Barwa for the second day.
Nigel Melker also changed squads and ended up third fastest for Racing Engineering, fractions ahead of Simon Trummer(Arden) and 2012 GP3 runner-up Daniel Abt (Lotus).
Unsurprisingly given the conditions, there was no shortage of incident across the day, with a total of nine red flags.
Three of those were caused by Lazarus's Rene Binder, who spun and stopped at Turns 5 and 6 in the morning and then halted at Turn 7 in the afternoon.
F3 Euro Series champion Daniel Juncadella and Rossi's Caterham team-mate Lucas Foresti also went off in the afternoon at Turn 4, before Pal Varhaug crashed his iSport machine at the same spot to bring the day to a premature conclusion.
Yesterday's pacesetter Luca Filippi didn't set a time in either the morning or afternoon for Coloni.
GP2 will next travel to Jerez in three weeks for the second and final post-season test of 2012.
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