"Saf1" (safone)
08/22/2015 at 08:32 • Filed to: Fan, fan-assisted, active aero, aerodynamics, ground effects, mclaren, mclaren f1, brabham, chapparal, 2j, fan car, bt46, bt46b, efficiency, downforce, airflow, pressure
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"Saf1" (safone)
08/22/2015 at 08:32 • Filed to: Fan, fan-assisted, active aero, aerodynamics, ground effects, mclaren, mclaren f1, brabham, chapparal, 2j, fan car, bt46, bt46b, efficiency, downforce, airflow, pressure | 2
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Downforce without the drag, or speed-dependent component of traditional wing downforce! So why does only McLaren use this relatively simple yet very effective technology in roadcars? Fans can be used to increase the effect of existing profiles for reducing pressure underbody, aid cooling and airflow through engine bay, as well as their own sucking car to the ground action...the only negatives i can think of are cost which is surely less than other relatively complex automotive endeavours and complexity which again compared to tech such as hybrid systems etc is much more simple. Plus what this system provides is unique, there is no other way to increase grip uniformly (not speed dependent) using aero and this method creates the least drag. Chapparal and Brabham both established this as an incredibly effective system in the 60s/70s, making this
!!!error: Indecipherable SUB-paragraph formatting!!!
for an effort from more automakers.
This pic and further info !!!error: Indecipherable SUB-paragraph formatting!!!
Bman76 (no it doesn't need a WS6 hood) M. Arch
> Saf1
08/22/2015 at 08:37 |
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That power has to come from somewhere, it’d hurt economy.
Tareim - V8 powered
> Saf1
08/22/2015 at 08:38 |
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Chapparal and Brabham utilised it with race cars, you cannot stick a fan on the back of a road car for it to blow stones and other debris on cars following behind
TwinCharged - Is Now UK Opponaut
> Tareim - V8 powered
08/22/2015 at 08:42 |
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Well, that’s arguably the excuse used by the competition...
Nauraushaun
> Saf1
08/22/2015 at 08:56 |
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I think it would be too inconsistent. If you’re relying on that downforce and you hit a bump or undulation mid-corner, you’re going off the road.
This is less of a problem on a smooth race track, and the downforce is more useful on a track too. So that’s a possible reason.
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Tareim - V8 powered
> TwinCharged - Is Now UK Opponaut
08/22/2015 at 09:07 |
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I’m sure there was some truth behind it and normal roads will have more debris on it than a race track so would be more noticeable
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Saf1
> Tareim - V8 powered
08/23/2015 at 02:08 |
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McLaren came up with a solution appropriate for street use so there’s definitely atleast 1 way to do it without impeding other drivers by turbulence or debris!
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Saf1
> Nauraushaun
08/23/2015 at 02:16 |
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This is true but can be accounted for! It’s funny you say this actually as when i was looking up fan aero in cars i came across an article about the active aero of the Veyron, part of which controls the ride height individually across the 4 corners to make sure the body is as parallel as possible to the ground to maximise efficiency of the underbody design, so similar systems can be used for other roadcars? Also i was wondering if it would benefit to have a “tunnel” design with a top-mounted fan(s) towards the back of the car for its partner (where the F1’s is in the above pic, or thereabouts) toward the bottom of the vehicle. The top fan would push air out and away so it will greatly aid engine cooling, and working in conjunction with the normal fan would increase the overall performance of the system?
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Saf1
> Bman76 (no it doesn't need a WS6 hood) M. Arch
08/23/2015 at 02:19 |
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It would, but all systems take power from somewhere to put out an increase elsewhere. Hybrid systems all have a “cost” to run but increase efficiency overall. This would consume power and add weight, especially if powered by a secondary engine/motor, but the benefit would be a unique increase in grip!
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Saf1
> TwinCharged - Is Now UK Opponaut
08/23/2015 at 02:22 |
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Feasible that it’s true though, when reading up on this I read that grating over the fans reduces their overall efficiency (based on proximity though so if the 2 can be separated much as possible...) so the entry/exit for the system probably had no obstructions for debris, just deflectors to protect the vital components
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Tareim - V8 powered
> Saf1
08/23/2015 at 05:59 |
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looking at the image they have done it at the front so works ok, it’s just the chapparal & brabham approach wouldn’t work for road use