https://www.motorsport.com/f1/news/honda-engine-development-approach-943360/
Hasegawa:
"We are changing our way of development, we're not too much insisting on mono-cylinder [dyno] development. We can check factors or elements or many concepts with the mono-cylinder [block] but we now understand we need to check with the V6 to finalise our specification. So we are no longer relying too much on the mono-cylinder results. As a reference, the mono cylinder test is important but to find the performance, we need to check the V6 results."
"The MGU-H failure took a very long time to solve, we had many small issues in the engine - and that area is difficult to understand on the dyno. We are about to solve that [MGU-H] issue, we just need to confirm on the circuit. But the MGU-H specification we have introduced includes solutions for the problem so I believe it's OK."
https://www.motorsport.com/f1/news/honda-engine-development-approach-943360/
Hasegawa:
"We are changing our way of development, we're not too much insisting on mono-cylinder [dyno] development. We can check factors or elements or many concepts with the mono-cylinder [block] but we now understand we need to check with the V6 to finalise our specification. So we are no longer relying too much on the mono-cylinder results. As a reference, the mono cylinder test is important but to find the performance, we need to check the V6 results."
"The MGU-H failure took a very long time to solve, we had many small issues in the engine - and that area is difficult to understand on the dyno. We are about to solve that [MGU-H] issue, we just need to confirm on the circuit. But the MGU-H specification we have introduced includes solutions for the problem so I believe it's OK."