SHANGHAI, April 16 (Reuters) - BMW-Sauber have accepted the decision that the controversial rear diffusers used by rival Formula One teams are legal but believe developing their own will take time, team principal Mario Theissen said on Thursday.
Together with Ferrari, Red Bull and Renault, BMW had appealed against the use of the structure by Brawn GP, who have won the first two races, as well as Toyota and Williams. It was dismissed by the governing FIA on Wednesday.
"We are not happy with the decision, we cannot be happy with the decision but we will definitely accept it and now we have to work and find a solution ourselves," Theissen told reporters at the Chinese Grand Prix.
"It will take time, it will take a lot of money. You cannot simply put it on the car. We have started development but so far we don't have a result."
whole raft of new regulations for this year, would further complicate and delay the development of a car to rival the championship leaders.
"If you have to change your car in the middle of the season and apparently you have to change the aero(dynamic) concept of your car, you have to test it," Theissen said. "And without this opportunity it will make it that much more difficult."
Renault's twice former world champion Fernando Alonso agreed that there would be no quick fixes.
"It's not just putting in one magic part in the car and you go quick, the philosophy of the car has to change a little," said the Spaniard.
He did, however, dismiss the idea that the 2009 world championship had already been decided by Wednesday's decision at the FIA appeal hearing.
"We will fight until the last opportunity, of course yesterday's decision will make it more difficult because we have a big gap to make up and this is never easy," he said.
"But the championship is long, you never know. We need to finish races, we need to score points and slowly develop the car and hopefully be one of the quickest at the end of the season."
The "double-decker" diffusers more effectively channel air down and out of the back of the cars, increasing downforce and giving a performance advantage.
