F1technical.net

WilliamsF1 wrote:

speedy56 wrote:

dren wrote:It has to be between 20~25kg per the regulations. It also has to be installed wholly within the survival cell. Look up some battery densities and you probably can figure out some rough dimensions.

I got 12x25x31cm in case of ρ=2580kg/m3 and battery weight of 25kg.
If we take battery weight of 20kg it ends up like 11.5x23x29cm

I think it really is something like this because when you put those dimensions in the survival cell (about 65cm wide at that area) it ends up similar to those video animations

Lithium ion battery
Specific energy density: 100 to 250 W·h/kg (360 to 900 kJ/kg)
Volumetric energy density: 250 to 620 W·h/L (900 to 1900 J/cm³)
Specific power density: 300 to 1500 W/kg

But does f1 use Li+ or lipo's?

Pierce89 wrote: But does f1 use Li+ or lipo's?

Mercedes have been using a Li-phosphate cell.

wuzak wrote:I think it is a combination of the ICE and ERS, but with the majority due to the ERS.

I believe Merc are extracting more out of their MGUH than either Renault or Ferrari, who may still be relying on the wastegates to control the turbo to some degree.

Merc can definitely recycle their captured MGUH energy directly to the MGUK. So that lengthens the amount of time the ES can supply power to the MGUK.

With the others I suspect that they have to use more of the stored energy in the ES on straights and may have to restrict the maximum they use so they can still have soem for other parts of the lap.

I am convinced that it's all down to the MGU-H and the ERS in General, when the others catch up, tables will be turned.

There are even talk of limiting the ERS, all in order to level the field.

Pierce89 wrote:

speedy56 wrote:

dren wrote:It has to be between 20~25kg per the regulations. It also has to be installed wholly within the survival cell. Look up some battery densities and you probably can figure out some rough dimensions.

I got 12x25x31cm in case of ρ=2580kg/m3 and battery weight of 25kg.
If we take battery weight of 20kg it ends up like 11.5x23x29cm

I think it really is something like this because when you put those dimensions in the survival cell (about 65cm wide at that area) it ends up similar to those video animations

Lithium ion battery
Specific energy density: 100 to 250 W·h/kg (360 to 900 kJ/kg)
Volumetric energy density: 250 to 620 W·h/L (900 to 1900 J/cm³)
Specific power density: 300 to 1500 W/kg

Who wants a deeper analysis of this matter I wrote something here : http://www.f1technical.net/forum/viewto ... 88#p490688[/quote]

Renault to evaluate Mercedes' split turbo Formula 1 engine concept, says Remi Tafin to Autosport - http://www.autosport.com/news/report.php/id/115092

Renault threatened to leave if f1 didn't change to the new style of PU. That seems really funny, considering their record for the previous 4 seasons. Renault will never get the publicity they're looking for, unless they have their own team again. Hell, a lot of people believe Vettel has an Infiniti in back of the rb5-9. Renault might be a shareholder in Infiniti, but I guarentee Viry doesn't like the whole situation.

People are saying the split turbo is better for aero packaging, and yeah, I could sort of see that, but isn't the split turbo also better at avoiding heat transfer between the turbine and the compressor? I would think that long shaft would have to mitigate a lot of the heat transfer to the compressor housing, perhaps giving a thermal advantage.

Also, I have heard rumors that the Ferrari turbo is sized too small (not sure which side of the turbo is too small...guessing the compressor), perhaps because Ferrari under-estimated the amount of 'anti-lag' they would be able to expect from the MGU-H?

Finally, what do you all think of Honda's effort to jump in next year? Will they be able to challenge Merc in any fashion regarding pure power? I wonder if Honda is splitting the turbo...?

Likely to see all merc teams running water air intercoolers next year

Kiril Varbanov wrote:Renault to evaluate Mercedes' split turbo Formula 1 engine concept, says Remi Tafin to Autosport - http://www.autosport.com/news/report.php/id/115092

If the Renault engineers haven't evaluated the split turbo with log-xhaust long before now they should all be fired.

xpensive wrote:

Kiril Varbanov wrote:Renault to evaluate Mercedes' split turbo Formula 1 engine concept, says Remi Tafin to Autosport - http://www.autosport.com/news/report.php/id/115092

If the Renault engineers haven't evaluated the split turbo with log-xhaust long before now they should all be fired.

Agreed, it would be sheer incompetence for them to have not investigated this months ago!

djos wrote:

xpensive wrote:

Kiril Varbanov wrote:Renault to evaluate Mercedes' split turbo Formula 1 engine concept, says Remi Tafin to Autosport - http://www.autosport.com/news/report.php/id/115092

If the Renault engineers haven't evaluated the split turbo with log-xhaust long before now they should all be fired.

Agreed, it would be sheer incompetence for them to have not investigated this months ago!

Fair to say that they had their hands full with the current config after not having a test mule

Any engineering office with self-respect would have a continuous evaluation of the competition, there are no xcuses for that.

tuj wrote: Also, I have heard rumors that the Ferrari turbo is sized too small (not sure which side of the turbo is too small...guessing the compressor), perhaps because Ferrari under-estimated the amount of 'anti-lag' they would be able to expect from the MGU-H?

Surely it would be the turbine that would be sized too small, I would have hopped they would be able to calculate their boost requirements pretty accurately. In any case, why would a larger compressor help with turbo lag? Surely it would only make it spool up slower.

It might spool up slower but the inertia of the larger turbine mass may reduce turbo lag overall once the turbine is spooled up.

It may also be easier for a larger turbine to drive the MGU-H due to the greater turbine mass inertia acting a little like a fly-wheel (hope I'm making sense).

Is it under the rules if Renault test the V6 of 2015 at Yas Marina Test of YDP which will be held after the Abu-double GP