D he exhaust development was the big technology -Topic of the Formula 1 season 2012. Little by little, all the engineers put the tailpipes in a channel in the bonnet. Most of the teams had finished the conversion by the summer break. After Mercedes followed suit in Singapore, only Lotus with a conventional exhaust remained of the established teams.
The engineering office in Enstone apparently noticed that only the second best solution was available in this area has to offer. The advantages of the normal variant are quickly explained. The tailpipe can be expanded to the maximum diameter, which leads to higher engine performance. For a long time, the Lotus engineers didn't care that the exhaust fumes go unused.
Lotus is the last team to follow suit
Other teams, such as McLaren, Sauber and Red Bull, had already noticed at the beginning of the season that it would bring more if you use the artificial flow to gain downforce. The gases are blown from the tailpipes, which are inclined upwards according to the regulations, through a convex duct. As a result, the flow sticks to the surface ('Coanda effect'). The side walls indicate the direction.
In Korea, Lotus presented its own solution for the first time. In contrast to the other teams, the engineers did not use heat-insulated carbon to shape the canal, but rather a heat-resistant titanium alloy. At first only Kimi Räikkönen was on the road with the shiny chrome update. However, the positive effect was immediately apparent, which is why Romain Grosjean's car was converted in Korea.
New Lotus exhaust costs performance
Lotus Technical Director James Allison was completely satisfied, however Not. 'The first version of our Coanda exhaust was a bit hungry for power,' explained the Briton. The tailpipes have to be made smaller so that the gases reach the wings on the brake linings and the diffuser roof and produce downforce there.
'We expect that with the help of Renault Sport we will achieve a third of the loss in Abu Dhabi. Later, about half of it, 'said Allison's hope. Above all, a new tailpipe variant should keep the loss of power within limits. Specially tuned engine mapping should also help. The immediate measures should bring seven horsepower.
All of themLotus updates in the video
The elaborately designed DRD system in the rear, which is intended to reduce downforce on the straight, will no longer be used this year. It was too complicated to fine-tune the technology so that the loss of downforce does not occur on sections of the route where it was not wanted.
In the exclusive video animation, auto motor und sport technology expert Giorgio Piola shows them again most important changes to the Lotus E20 from the last races - from the DRD system to the new exhaust to the front wing.