Actual 2014 gearing from online videos

All that has to do with the power train, gearbox, clutch, fuels and lubricants, etc. Generally the mechanical side of Formula One.
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Re: Actual 2014 gearing from online videos

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I thought the final drive could still be changed though? Even playing with the differential ratio can alter things.
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strad
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Re: Actual 2014 gearing from online videos

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nope...I have repeatedly been told no
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Abarth
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Re: Actual 2014 gearing from online videos

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Easiest thing is to read this piece:
http://www.fia.com/sites/default/files/ ... 1-23_0.pdf

Adobe Reader has a handy search function too, for searching the document.

9.6.2 Each competitor must nominate the forward gear ratios (calculated from engine crankshaft to drive shafts) to be employed within their gearbox. These nominations must be declared to the FIA technical delegate at or before the first Event of the Championship. For 2014 only a competitor may re-nominate these ratios once within the Championship season, in which case the original nomination becomes immediately void. Ratio re-nominations must be declared as a set.

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Re: Actual 2014 gearing from online videos

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hollus wrote:
Gear	Willi.	McLar.	T.Rosso	R.Bull	Lotus	Marus.	Ferrari		Sauber		Merce.	F.India
1		19.29									13.60	14.64
2	11.24	12.58	12.43	13.51		11.81	11.40		11.05		11.51	11.56
3	9.60	9.35	9.31	9.91	10.17	9.33	9.43		9.03		9.58	9.52
4	8.02	7.73	7.71	7.82	8.01	7.78	7.71		7.49		7.88	7.90
5	6.82	6.34	6.49	6.46	6.72	6.64	6.63		6.59		6.30	6.29
6	5.70	5.45	5.47	5.52	5.70	5.78	5.78		5.68		5.11	5.12
7	4.95	4.84	4.72	4.89	5.04	5.14	5.11		5.13		4.30	4.39
8	4.40	4.38	4.28	4.42	4.35		4.61
I think it's great that you have done this. I understand it best when graphed like these.... With log vertical axis or linear, depending on your preference:

Log scale:
Image

Linear Scale:
Image

(edited to replace with better versions of charts)
Last edited by Greenish on Mon Apr 28, 2014 12:46 am, edited 1 time in total.

Greenish
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Re: Actual 2014 gearing from online videos

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Or I suppose you could do this (!)....

Image

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strad
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Re: Actual 2014 gearing from online videos

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What is screwed up is the fixxed rear drive ratio.
Because it's too high (most the time) they're are almost never geared quite right. It's a stupid rule.
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hollus
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Re: Actual 2014 gearing from online videos

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I found a video of Kobayashi onboard in China, in green intermediates: http://www.youtube.com/watch?v=F_xsRAfnyO8 and used it to extract gearing data for the only team missing.
I won't post the graph as it needed "converting to dry" and I am not 100% sure of how well that went. I expected to need to convert the resulting speeds (the ratios are mechanically fixed) to their dry tire equivalent by reducing speeds by 3% to compensate for the 670mm diameter of wet tires compared to 660mm for dry tires. Instead I took a more pragmatic approach: I compared Mercedes' data with dry tires and with inters. The difference was only 0.38%. Am I missing something here? Are inters the same diameter as dry tires? In that case is the small difference due to extra thread? To different inflation pressures?
The data I finally took includes this 0.38% reduction to fit to dry tires as for everyone else. Bottom line is that the data for Caterham might be off by 0.4% or it might even be off by 2.6%. But I think I can live with that.
Last edited by hollus on Sat May 03, 2014 1:46 pm, edited 1 time in total.
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hollus
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Re: Actual 2014 gearing from online videos

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And then there were 11!

Part one done, I am very happy with the result, big thanks to all that helped. Now the chase for new gearing sets and the missing 8th and 1st gears starts.

This is the almost complete graph after China:
Image
As a reminder, the data for the last three are a bit less reliable, as are the data for the 1st gears available.

And the resulting gear ratio table (minor updates to some teams, but the changes are really small):
Gear	Merc.	Will.	McLar.	F.India	T.Rosso	R.Bull	Lotus	Marus.	Ferrari	Sauber	Caterham
1	13.597		19.288	14.636							
2	11.509	11.238	12.579	11.562	12.429	13.508	13.612	11.815	11.403	11.045	13.800
3	9.577	9.600	9.347	9.519	9.305	9.913	10.173	9.333	9.425	9.025	10.016
4	7.879	8.021	7.732	7.904	7.713	7.825	8.006	7.776	7.708	7.487	7.885
5	6.299	6.824	6.344	6.293	6.486	6.460	6.725	6.642	6.628	6.586	6.561
6	5.105	5.702	5.454	5.122	5.471	5.524	5.704	5.778	5.784	5.679	5.548
7	4.299	4.953	4.839	4.396	4.723	4.886	5.039	5.141	5.113	5.128	4.967
8		4.401	4.373		4.281	4.418	4.350		4.608		4.484
P.S. If anybody wants to use this, wherever, go ahead. Citing the source would be nice, though.
Last edited by hollus on Thu May 08, 2014 6:54 am, edited 2 times in total.
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hollus
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Re: Actual 2014 gearing from online videos

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By the way, how exactly is the speed we get fed measured? Is it the same as the teams use in their internal telemetry?
Is it from a ground sensor? From GPS? From axle rotational speed assuming a certain wheel circumference?
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hollus
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Re: Actual 2014 gearing from online videos

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A guy at F1fanatic just gave me some data from Caterham in FP2 in dry tires in Malaysia, and from his numbers I can see that reported speeds in the wet are about 3% higher than reported speeds in the dry for the same RPM. This fits very well with the difference between a 660mm diameter tire and a 670mm diameter tire.
This was definitively not the case for Mercedes, where the difference was about 0.4% (this might even be within my error margin) but in the opposite direction.

Is there a switch that tells the ECU that it now has bigger tires on (the wet engine map, maybe?) and makes it then increase reported speeds by 3.05%? Can it be that Mercedes just sidestepped this in the practice session I took numbers from?
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Paul
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Re: Actual 2014 gearing from online videos

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I know that switching to wet map changes the speedometer calibration that the driver sees accordingly, not sure where telemetry data we see comes from, before that change, after that change or maybe from completely different source...

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Re: Actual 2014 gearing from online videos

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The superiority of the Mercedes powertrain can virtually be inferred from this gearing data.

1. The MB powered teams are running much taller gearing overall indicating a probable power extension to lower rpm than other teams.

2. Similarly they are using wider gear spacing confirming power at lower rpm and a wider power band.

Developing power at lower revs (eg peak power at 10,500 rpm) means more power (lower friction losses subtracted from the fixed energy rate permitted by the rules).
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hollus
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Re: Actual 2014 gearing from online videos

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Graph and ratios corrected (in the post above) to account for this 3.05% difference due to tire diameter, for Caterham only. I think (not 100% sure) that these are the correct ratios.
Now Caterham no longer has one of the longest 8th gears, which makes sense. They also now have the shortest second gear. Actually all Lotus engined teams have very short 2nd gears. So short that they sacrifice the overlap between 2nd and 3rd gears and have to reduce RPM by more than 3000 to do that shift. So either they rev very high before, or lose power afterwards, but I guess since they are at speeds where wheelspin is a real danger, it doesn't matter too much.
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hollus
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Re: Actual 2014 gearing from online videos

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Found Ferrari's 1st gear from Alonso in FP2 in Monaco, in green inters http://www.youtube.com/watch?v=bF332HpdpqI. Interestingly, as with Mercedes before, the teams seems not to have applied the 3% correction to their telemetry. Maybe they are only forced to do so in Quali and the race?

The calculated 1st gear ratio is 15.748, shorter than Mercedes and Force India (there is an error in the graph for 1st gear for Force India, which was copied from Mercedes by mistake, to be updated after the weekend), but much longer that that of the McLaren. In Loews Alonso was going as low as 40Km/h at 4962rpm and he spent most of the curve in the 5xxx rpm range, but he didn't seem to be pushing much, if at all. In fact he spent much of the lap at about 8000rpm upshifting very early.

We'll see if they are still using 1st gear in Loews when pushing in a dry track.
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pob
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Re: Actual 2014 gearing from online videos

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Toro Rosso changed their gear ratios before Monaco.