Mercedes warns against 'double spending' on F1 engine development
Mercedes boss Toto Wolff has warned against Formula 1 forcing engine suppliers into "double spending" on development costs of both the current and future power units
Renault Sport boss Cyril Abiteboul has previously called for a freeze on development of the current engine over the next two years so that all four manufacturers can focus on the new designs due to start racing in 2021.
The freeze option is still under discussion, and Wolff is keen to see it implemented.
"The only major thing which we need to solve is that we are still spending a lot on engine development," said Wolff.
"What we need to avoid is double spending over the next years, continuing to develop the current engine, and then also doing the new one."
Wolff remains confident that the 2021 rules are going in the right direction, despite Mercedes being opposed to the loss of the MGU-H.
"We have given up on some of the standpoints," he said. "We have accepted to lose the MGU-H.
"We think that the technology is a step backwards, but in terms of achieving a compromise for the benefit of the spectacle, the 'H' going, the revs going up, the fuel limitations going, I think we will have a louder engine, we will not be limited by fuel.
"It's not the most sustainable message we're sending out, but we can understand from a spectacle standpoint it is something you need to consider and accept. On most of the topics we have found an agreement.
"There's a discussion on dyno limitations, we don't want to continue to outgrow each other with more infrastructure.
"On the engine regulations we're pretty close on being able to tick the box."
Wolff admitted Mercedes was not willing to compromise on everything that has been discussed, drawing the line at an attempt to take fuel consumption out of the equation entirely.
"I had a bit of a moment in the Strategy Group [meeting], one where I need to speak to my anger management psychologist, when we talked about getting rid of fuel flow limitations, all fuel flow allowances, and just open it up," he said.
"We cannot close our eyes to what's happening in the world. Hybrid energy recovery systems have been on road cars, and they need to happen in F1 in my opinion.
"But equally we have to understand what the fan is interested in.
"It needs the technology message, but it needs to be at the level where we recognise that spectacle is important, and shocking your senses with an engine sound is maybe something that we can improve."
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