F1technical.net

What issues?

SiLo wrote: ↑

24 Feb 2020, 15:40

What issues?

they had some on the 2nd day of testing (with Bottas and Latifi)... like Ferrari and Honda (Honda checked their engine and used it further, Merc and Ferrari didn't)

Ah yes, wasn't the Bottas one hydraulics? I believe Ferrari were the only to replace the engine?

SiLo wrote: ↑

24 Feb 2020, 16:54

Ah yes, wasn't the Bottas one hydraulics? I believe Ferrari were the only to replace the engine?

A sensor in BOT 's PU signalled overheating and then they sent it to Brackley for checks. VET's PU had a lubrication oil leak*.

*in cylinder, apparently.

https://it.motorsport.com/f1/news/test- ... e/4693134/

ncx wrote: ↑

24 Feb 2020, 17:11

SiLo wrote: ↑

24 Feb 2020, 16:54

Ah yes, wasn't the Bottas one hydraulics? I believe Ferrari were the only to replace the engine?

A sensor in BOT 's PU signalled overheating and then they sent it to Brackley for checks. VET's PU had a lubrication oil leak*.

*in cylinder, apparently.

https://it.motorsport.com/f1/news/test- ... e/4693134/

Useful info, thanks.

Since Mercedes have been talking about working hard to make sure they could run the engine hotter, it would make sense they need to check such a signal thoroughly, wouldn't it?! As I understand it, they probably had worked on removing hot spots in the PU, which might well need some further effort to get completely done, so this might be a sign of that.

Hmm, the posted article suggests that Merc played down the issues but that it was in fact more severe than they let on...

SiLo wrote: ↑

24 Feb 2020, 16:54

Ah yes, wasn't the Bottas one hydraulics? I believe Ferrari were the only to replace the engine?

Mercedes replaced the engine too, according to Mark Hughes.

De Jokke wrote: ↑

24 Feb 2020, 17:50

Hmm, the posted article suggests that Merc played down the issues but that it was in fact more severe than they let on...

Where in the it.motorpsort article do you read that Mercedes problem was more troublesome than the team let on? My reading of a (translation) of it does not give that impression really. The remark that it is interesting that the three top/works teams are affected by a PU issue, while their customers are not which suggests they are playing on the knife-edge is the most notable.

"But while Mercedes appeared to run without drama, Motorsport.com has learned that the electrical problems that stopped Bottas on the second day of testing were more terminal than original indicated. In fact, the power unit itself was broken and had to be replaced."

https://us.motorsport.com/f1/news/merce ... t/4692245/

Isn't that why they go testing? To find out the weaknesses and fix them, just as much as to check the aero results.

De Jokke wrote: ↑

25 Feb 2020, 00:01

"But while Mercedes appeared to run without drama, Motorsport.com has learned that the electrical problems that stopped Bottas on the second day of testing were more terminal than original indicated. In fact, the power unit itself was broken and had to be replaced."

https://us.motorsport.com/f1/news/merce ... t/4692245/

According to the It.motorsport article, it had to be replaced because a temp sensor was triggered:

The world champion team sent the power unit to Brackley which was replaced Thursday afternoon after Bottas stopped in the Barcelona tests, due to overheating in the hybrid signaled by a sensor. The trouble has been identified and does not worry Stella's technicians.

We don't really know how 'terminal' the issue was until Mercedes figure out if something legitimately overheated or if it was just a false sensor reading.

I wonder what happened in Latifi's case though.

bosyber wrote: ↑

24 Feb 2020, 17:17

ncx wrote: ↑

24 Feb 2020, 17:11

SiLo wrote: ↑

24 Feb 2020, 16:54

Ah yes, wasn't the Bottas one hydraulics? I believe Ferrari were the only to replace the engine?

A sensor in BOT 's PU signalled overheating and then they sent it to Brackley for checks. VET's PU had a lubrication oil leak*.

*in cylinder, apparently.

https://it.motorsport.com/f1/news/test- ... e/4693134/

Useful info, thanks.

Since Mercedes have been talking about working hard to make sure they could run the engine hotter, it would make sense they need to check such a signal thoroughly, wouldn't it?! As I understand it, they probably had worked on removing hot spots in the PU, which might well need some further effort to get completely done, so this might be a sign of that.

Generally mercedes were not top.of sheet at first test but this time they were. Maybe because of cooling test they forced their engine. In some stage they put another small hole on sidepod. Last year it was their only weak point was cooling but it seems to me that they still have same issues. If they have issues with cooling in winter it is a real problem during summer.

etusch wrote: ↑

25 Feb 2020, 13:00

In some stage they put another small hole on sidepod. Last year it was their only weak point was cooling but it seems to me that they still have same issues. If they have issues with cooling in winter it is a real problem during summer.

When did they add a hole? Where was the hole added?

Just_a_fan wrote: ↑

25 Feb 2020, 13:11

etusch wrote: ↑

25 Feb 2020, 13:00

In some stage they put another small hole on sidepod. Last year it was their only weak point was cooling but it seems to me that they still have same issues. If they have issues with cooling in winter it is a real problem during summer.

When did they add a hole? Where was the hole added?

Just downside of sidepod inlet. It was said it is for electronics cooling.

etusch wrote: ↑

25 Feb 2020, 13:37

Just_a_fan wrote: ↑

25 Feb 2020, 13:11

etusch wrote: ↑

25 Feb 2020, 13:00

In some stage they put another small hole on sidepod. Last year it was their only weak point was cooling but it seems to me that they still have same issues. If they have issues with cooling in winter it is a real problem during summer.

When did they add a hole? Where was the hole added?

Just downside of sidepod inlet. It was said it is for electronics cooling.

That was there at launch and appears to replace a duct that previously opened in the bottom lip of the sidepod entry. That's not an indication of a cooling problem, merely a different approach to cooling existing electronics items.