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WSBK: Are the aerodynamics regulated?

Joined Mar 2007
8K Posts | 2K+
Texas
As you are all aware, I believe WSBK is rev-limited during homologation, but excluding a brief aside with Povol, I have been fortunate not to have a single person ask me to prove that WSBK is also aerodynamic regulated in accordance with the non-aggression philosophy of the MSMA for SBK competition. The only way bikes with the same power can achieve the same top speeds, is if the aerodynamics is very similar as well. An aerodynamic war would lead to the creation of MotoGP-sized bikes and seeing as that hasn't happened, it is reasonable to go in search of somekind of regulation.



I've never mentioned aerodynamics b/c I assumed I would never find anything so I would just have to avoid the subject.
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Anyway, I stumbled across this interesting bit of information, on Wikipedia's discussion section for the class structure of TTXGP's open source rulebook. The info was posted by Harry Mallin (user: EMotoRules) who is the moderator of the TTXGP rules wiki. He is also in charge of the TTXGP open source rulebook.



Was thinking there could be multiple classes consisting of...



Body Style:



1. Streamliner

2. Feet Forward

3. FIM, AMA, ??? regulation faring (not sure if the modern sportbike racings fairing has a technical name)



Number of Motors:



1. 1 motor

2. Multiple motors



As you are probably aware, aerodyanmic regulation is actually very common in racing even in very popular classes like DTM, WTCC, Grand Am, etc. They generally set a frontal area requirement and then give a drag test at a given speed prior to homologating the shape. The practice is not uncommon at all.



You will see in the bold comment that EMotoRules refers to an FIM, AMA regulation fairing. We all know that the FIM homologate a shape b/c WSBK is a silhouette class, but EMotoRules seems to believe that the fairings are "regulation" and that the modern sport bike racing fairing (singular) may have a name.



I don't think this is conclusive evidence in any way shape or form, but I just thought I would let the good people of PS know that I am always digging. I will disseminate information even if people don't want to know.
<




LINK
 
As you are all aware, I believe WSBK is rev-limited during homologation, but excluding a brief aside with Povol, I have been fortunate not to have a single person ask me to prove that WSBK is also aerodynamic regulated in accordance with the non-aggression philosophy of the MSMA for SBK competition. The only way bikes with the same power can achieve the same top speeds, is if the aerodynamics is very similar as well. An aerodynamic war would lead to the creation of MotoGP-sized bikes and seeing as that hasn't happened, it is reasonable to go in search of somekind of regulation.



I've never mentioned aerodynamics b/c I assumed I would never find anything so I would just have to avoid the subject.
<




Anyway, I stumbled across this interesting bit of information, on Wikipedia's discussion section for the class structure of TTXGP's open source rulebook. The info was posted by Harry Mallin (user: EMotoRules) who is the moderator of the TTXGP rules wiki. He is also in charge of the TTXGP open source rulebook.







As you are probably aware, aerodyanmic regulation is actually very common in racing even in very popular classes like DTM, WTCC, Grand Am, etc. They generally set a frontal area requirement and then give a drag test at a given speed prior to homologating the shape. The practice is not uncommon at all.



You will see in the bold comment that EMotoRules refers to an FIM, AMA regulation fairing. We all know that the FIM homologate a shape b/c WSBK is a silhouette class, but EMotoRules seems to believe that the fairings are "regulation" and that the modern sport bike racing fairing (singular) may have a name.



I don't think this is conclusive evidence in any way shape or form, but I just thought I would let the good people of PS know that I am always digging. I will disseminate information even if people don't want to know.
<




LINK



To answer your question, WSBK is regulated by silhouette (e.g. the bikes have to look like the street bikes) and the street bikes are styled to look like the GP bikes and to provide some modicum of comfort - for a sports bike, of course. So the WSBK aeros are controlled (albeit indirectly) by the GP aero regs, because punters want to buy bikes that looks like Rossi's. Do anything radical and you scare bikers (who are incredibly conservative in terms of taste) off (cf. funny front ends, front wheel drive, etc etc).



Eskil Suter, by the way, is an aerodynamic atheist. He believes aero is irrelevant, and that what is much more important is corner exit speed. I sort of agree with him, though aero plays a much bigger part than he believes.



But you can't really compare car aero and bike aero, because 1. Bikes lean over, ruining the aero, and 2. bikes have riders, utterly ruining the aero.
 

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