Hot Race for Silverstone

by seb
Published on: 16 June, 2011
Categories: yack on F1
Comments: 1 Comment

Hot Race for Silverstone

Well, almost the opposite actually as the FIA plan to ban the blown diffuser or rather the off-throttle blown diffuser.
Should make the Championship a bit more open for the last half of the season as I for one have never been a fan of dominant teams, whoever they are. Aerodynamic, mechanical, electronic and other dominant cars actually skew the driver results. Fundamentally making bad drivers (i’m thinking of some now) look far better than they actually are and effectively gifting them a Championship.
Excerpt from F1 .com:
  • Under the banner of Formula One’s Technical Working Group, the teams and the FIA are due to meet on Thursday to discuss the use of blown diffusers, and in particular the expected clampdown on off-throttle blown diffusers, a technology that has become an increasingly hot topic of debate in 2011. Here is our layman’s guide to what is involved.
  • What is a blown diffuser?On road cars, the engine exhaust exits are normally located at the rear of the car. On a Formula One car they are deliberately located in front of the rear wheels so that the hot, fast flowing exhaust gases can be channelled towards the car’s rear diffuser. This increases airflow through the diffuser and in turn increases the amount of downforce the diffuser produces. This is perfectly legal under current F1 regulations.
  • What is an off-throttle blown diffuser? Normally the engine will only produce exhaust gases when the driver is on the throttle. This means when the driver lifts off, the blown diffuser is suddenly robbed of the additional airflow. To get around this, some teams have modified their engine mapping so that when the driver lifts off, although fuel supply and ignition are cut, airflow through the exhaust – and hence to the diffuser -continues. This technique has become known as ‘cold blowing’ – the exhaust is still ‘blowing’ into the diffuser, but that airflow is now ‘cold’ since no fuel or ignition is involved.
  • What is ‘hot blowing’? Some teams have taken things a step further. To make the off-throttle ‘blowing’ as similar – ie as hot and fast flowing – to the on-throttle ‘blowing’ as possible, they cut the ignition when the driver lifts off the throttle, but continue to inject some fuel through the engine’s valves into the exhaust. This fuel ignites on the hot exhaust, increasing the amount, speed and temperature of the airflow exiting towards the diffuser.
  • Why does the FIA want to clampdown on off-throttle blown diffusers? The FIA has argued that the car’s exhaust system is there to exhaust gasses from the engine. [..More..]
1 Comment - Leave a comment
  1. Anon says:

    Recently in Arkansas a flash flood has drowned several campers. It’s like that here in NZ too; when there’s flooding, it’s always people in tents in camping grounds who get washed away. Is there any special reason why they always choose flood-prone locations for camp sites?.

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