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  # 1782891 16-May-2017 07:19
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BruceHamilton:

 

F1 fuel rules allow teams to have 5 different petrol blends for the season,  but can only use two of the blends for a race weekend. Petrol consists of 100s of hydrocarbons, and the F1 fuel blends must only contain components normally found in commercial fuels, so no nitromethane, propylene oxide, or friends. Playing with the hydrocarbon formulation can result in significantly different delivery of power and improved ability to handle ambient temperatures. In recent years cooled fuels ( contain more oxygen ) were banned, and the maximum volume of fuel was changed to a maximum mass of fuel ( 105kg? ). Mercedes moved from Mobil to Petronas, and BP has reentered F1 after 3 years away. Oil company participation is critical for optimising fuel and decreasing mechanical friction using specialist lubricants.

 

Each team must submit 5L of each blend to the FIA during race weekend, where it is tested for compliance. Each team is partered to a major oil company that will provided full fuel and oil analysis at the racetrack using mobile laboratories, as well as specific formulations for each track. FIA has reduced the unlimited fuel formulations rule up to 2016, to just 5 formulations for 2017.  Constraints on maximum power delivery were also changed, resulting in engines being redesigned to cope with extra power during racing.  With the introduction of turbulent jet ignition, fuels will be re-optimised to improve smoothness of power delivery and combustion efficiency. 2017 was expected to result in much greater stress on engines, hence the talk of using steel pistons and 3D printed components.

 

 

Ok, so why did Honda use a different fuel to build their engine upon?





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  # 1782975 16-May-2017 10:04
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The fuels for testing engines look for comparative performance ( how the engine has improved due to changes ) and also testing conditions are lower stress - as it's a new or rebuilt engine. The two race fuels are chosen ( from 5 ) based on expected weather conditions and the specific racetrack. There were/are rules about number of engines per season etc. I doubt the engines fail due to different fuels, it's more about design of components, and expected mechanical and thermal stresses during racing. Honda have underestimated some race day factors, such as higher and more rapid power delivery available in 2017 engines.


 
 
 
 


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  # 1783032 16-May-2017 11:36
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BruceHamilton:

 

The fuels for testing engines look for comparative performance ( how the engine has improved due to changes ) and also testing conditions are lower stress - as it's a new or rebuilt engine. The two race fuels are chosen ( from 5 ) based on expected weather conditions and the specific racetrack. There were/are rules about number of engines per season etc. I doubt the engines fail due to different fuels, it's more about design of components, and expected mechanical and thermal stresses during racing. Honda have underestimated some race day factors, such as higher and more rapid power delivery available in 2017 engines.

 

 

There are 2 issues

 

1. Honda in race fuel cannot get the same power delivery, needing to turn down the power to get the engine happy. This is when then engine is not failing.

 

2. The engines also fail, whether or not related to 1 I am not sure.





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  # 1783924 17-May-2017 21:29
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  # 1785518 21-May-2017 16:34
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Any ideas on the indycar schedule over the coming weekends?

https://www.youtube.com/user/indycars/videos

 

 

 

 


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  # 1785532 21-May-2017 17:30
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top 9 shoot out(not sure of exact words) today.

 

I am sure the the shoot out doesn't directly lead to chances of race win, but indirectly, could avoid pile ups from the rolling start if in front, and one more practice run for the 9 guys (no gals i presume?)

 

race next week.





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  # 1785605 21-May-2017 20:08
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joker97:

 

top 9 shoot out(not sure of exact words) today.

 

I am sure the the shoot out doesn't directly lead to chances of race win, but indirectly, could avoid pile ups from the rolling start if in front, and one more practice run for the 9 guys (no gals i presume?)

 

race next week.

 

 

Oh yeah. Been travelling, forgot. Heard on radio he was in top 5, I assume that was practice session? I will need to check Sky

 

Got Quali replay recording now, and scheduled Quali 2. Dang, has other coverage been on?

 

I watched a Ferrari vs Ford LeMans doco on plane last night, am amped up. Alonso could be making history in a race that is long, long forgotten for F1 participation. 


 
 
 
 


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  # 1785732 22-May-2017 07:50
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http://racecontrol.indycar.com/

 

 

 

Live timing and audio coverage.




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  # 1786367 23-May-2017 08:47
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Watched Quali, was very cool to watch actually. Alonso did exceptional, in what are bad and fast cars, in that they strip most downforce off to get a fast but unstable car for quali. His times are way up there. While the race trim is much different, as is racing in a big field on an oval for him, he has passed the test admirably. As with quali, he will be told all the tricks about racing at Indy, so a top 5 is well and truly on the cards


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  # 1786377 23-May-2017 08:57
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his times are way up there because he has the fastest car! means little in a 6 hour race. that comes down to car (good) + driver (???) + strategist (good) + luck[or other people's luck being greater] (???)





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  # 1786406 23-May-2017 09:17
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joker97:

 

his times are way up there because he has the fastest car! means little in a 6 hour race. that comes down to car (good) + driver (???) + strategist (good) + luck[or other people's luck being greater] (???)

 

 

Thats a glass half empty approach.

 

He has 5 team mates, 4 from Andretti Autosport Indycar, and like Alonso, one other temporary entry from another team. So he doesn't have the fastest car, he has a fast car, and zero experience in a formula that is a lot different to F1, both in terms of car and tracks.

 

Car = Good

 

Driver = punching well over his weight as a rookie in the car and the race style

 

In a long race, strategy and luck counts, sure.

 

His odds of a top 9 quali a few weeks ago were 20/1 they are now 7/1 for an Indycar win. Like F1, the likely winner is a small number, around 6 or 7. Given what he has shown from a base of 0, it is exceptional. I also figure that he might be the unofficial team orders favourite. Hunter-Reay is a proven top liner and team mate, that gives you a good guide to how Alonso has run to date. Despite zero experience, his performances so far are what you would expect if he had a season behind him. And he made a mistake in quali on one lap that dropped his 4 lap average speed

 

 

 

 


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  # 1786442 23-May-2017 09:30
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Alonso has good car control yes. But this is a race which the driver is not there for their car control, but to drive a rigged car (a left turning car) at the limit of friction, and adjusting the limits with his hands according to how the limits of friction changes. the strategist calls out the strategy (inc fuel consumption). i guess one thing he's used to is to save fuel lol. makes me want to watch the race nonetheless. anyone knows what time?





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  # 1786462 23-May-2017 09:41
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joker97:

 

Alonso has good car control yes. But this is a race which the driver is not there for their car control, but to drive a rigged car (a left turning car) at the limit of friction, and adjusting the limits with his hands according to how the limits of friction changes. the strategist calls out the strategy (inc fuel consumption). i guess one thing he's used to is to save fuel lol. makes me want to watch the race nonetheless. anyone knows what time?

 

 

Pre Race 3am to 4am Monday, Race 4am to 7-30am ESPN2 on Sky

 

 

 

Yes, its very much like F1, "rigged", team calls strategy, fuel saving. I guess what you are saying is that driver skill is not that important as they just turn the wheel.


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  # 1786483 23-May-2017 10:10
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Not strictly on Topic, but relevant given recent discussion's around the Indy 500.

 

Scott Dixon was robbed at gunpoint while at a Taco Bell drive through.

 

http://www.stuff.co.nz/sport/motorsport/92866294/indy-500-polesitter-scott-dixon-wife-former-teammate-robbed-at-gunpoint

 

Dario Franchitti was also in the car at the time.

 

A report I heard on Radio Live news bulletin said two teenagers had been arrested in relation to the robbery.

 

 


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