07-03-2022, 04:39 AM
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#21 (permalink)
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It's all about Diesel
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Quote:
Originally Posted by Phase
regular duct tape doesn’t hold up well at 90 mph and head winds haha
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It's also not so smooth as it would be desirable for an aerodynamic purpose...
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07-03-2022, 11:06 AM
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#22 (permalink)
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Master EcoModder
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Quote:
Originally Posted by cRiPpLe_rOoStEr
Messing up aero while braking could eventually improve braking, and decrease wear and tear of the brakes too. Not a bad idea at all, yet controlling the flaps may add a layer of complexity and weight...
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Also, you need to consider what would happen if one of the flaps fails. If one side gets cooling airflow but the other does not, that may result in uneven braking (i.e. pulling to one side). That might be dangerous, depending on the situation.
Another consideration would be legality, in the event of a crash. If the opposing attorney finds out you modified the braking system and it failed, they will have a field day with that.
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07-03-2022, 04:52 PM
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#23 (permalink)
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aero guerrilla
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Quote:
Originally Posted by Blacktree
Also, you need to consider what would happen if one of the flaps fails. If one side gets cooling airflow but the other does not, that may result in uneven braking (i.e. pulling to one side). That might be dangerous, depending on the situation.
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The flaps could be physically connected to ensure they always open & close symmetrically.
Also, I think the slight asymmetry in aero wouldn't be noticeable - many cars already have this. For example - no side mirror on the passenger side, antennas or flags on 1 side, asymmetrically open windows, dents and missing parts...
Quote:
Originally Posted by Blacktree
Another consideration would be legality, in the event of a crash. If the opposing attorney finds out you modified the braking system and it failed, they will have a field day with that.
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Not more than any other mods that are done by Ecomodders, ricers, Rednecks 
The braking system itself would not be altered, the flap actuators would piggyback on top of it, like the braking light - If the light fails the brakes still work. The only thing effected by the failure of the flaps system is brake cooling. Similar effect by full mooncaps, closing the wheelwell gap, better undertray, etc.
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e·co·mod·ding: the art of turning vehicles into what they should be
What matters is where you're going, not how fast.
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[Old] Piwoslaw's Peugeot 307sw modding thread
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07-07-2022, 03:22 AM
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#24 (permalink)
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It's all about Diesel
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Quote:
Originally Posted by Blacktree
Another consideration would be legality, in the event of a crash. If the opposing attorney finds out you modified the braking system and it failed, they will have a field day with that.
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The attorney would have to be a hell of an ambulance-chaser to figure out how the device works and what's its purpose  |
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07-07-2022, 04:03 AM
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#25 (permalink)
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Just don't have the patent application in the glove box. 
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07-07-2022, 05:16 PM
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#26 (permalink)
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EcoModding Lurker
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Interesting discussion on flaps for brake cooling. I'd be tempted to try a shape memory alloy flap actuator so the flap is opened when the brake exceeds some temperature or other. AFAIK all cars need to pass a brake test which consists of 10 consecutive rapid stops from 90% of maximum speed, so they should withstand a fair amount of heat soak.
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07-08-2022, 02:34 AM
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#27 (permalink)
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It's all about Diesel
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Thermostatically-controlled flaps may be a good idea, yet eventually the flaps wouldn't even be required considering normal driving conditions.
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