in racing, the measures taken with tongs and modifications are measured in millimeters, but the idea that the aerodynamics of a MotoGP bike may depend on the chin of the helmet is 5mm shorter is certainly surprising.
This is exactly the point in talks Yamaha racing department is holding with HJC, sponsor Korean town of Jorge Lorenzo. "We have to win 5 mm," explained the director of Yamaha MotoGP Kouichi Tsuji-man primarily responsible for the YZR-M1-sport rider during the official launch of 2015 Yamaha team, held in Madrid. "We have made aerodynamic tests with Jorge and we need this distance when hiding behind the fairing on the straights."
To the average fan of the race that might sound a bit absurd, but Tsuji-san insisted that this small difference is aerodynamically very important. "There is no way to win these 5mm. Jorge rests helmet in the tank just above the ECU. If we could use our own hardware we could cut 5 mm, but obligatory ECU Dorna is very large, there is no way win anything or changing its position. That is why we are asking for reducing chin HJC Jorge 5 mm ".
This is not the first time that Lorenzo helmet found with aerodynamic problems in ultra-high speeds reached by MotoGP bikes. Last year, engineers detected some problems with measurements that are performed each year in the first preseason testing in Sepang. In testing this first year, are taken and sent to Japan for analysis by aerodynamicist’s specific images with riders hidden behind fairings of the two long straights of Sepang. It is the starting point for accurately analyze aerodynamic performance.
This is not the first time that Lorenzo helmet found with aerodynamic problems in ultra-high speeds reached by MotoGP bikes. Last year, engineers detected some problems with measurements that are performed each year in the first preseason testing in Sepang. In testing this first year, are taken and sent to Japan for analysis by aerodynamicist’s specific images with riders hidden behind fairings of the two long straights of Sepang. It is the starting point for accurately analyze aerodynamic performance.
The importance of aerodynamics in MotoGP is aptly demonstrated by this frontal shot of Lorenzo promotional getting behind the dashboard of your M1 2015. Notice how the fairing and windshield Profile form around the shoulders and helmet Lorenzo.
Last season, that particular issue aerodynamics, lasted for much of the year. The problem was the design and aerodynamic spoiler position in the back of the helmet. Designed for a less radical demand for speed, this spoiler literally became a kind of flutter or air brakes during stuck in radically positions taken by the MotoGP riders on the straights. This affected not only the performance of the bike, but also the discomfort to the driver shaking his head at lightning fast speeds aerodynamic resistance. We know that during the second part of the season HJC technical experimented with different types of spoilers at different heights on the back of the helmet. The difference between a seamless integration and one that is not so good can be very significant. An example are the measurements made by Suzuki with Aleix Espargaró and Maverick Viñales. The maximum difference in speed between the highest and the smallest Aleix Maverick appeared to be more than 0.5 MPH ... and this is in short circuits like Valencia or Jerez. In other tracks like Sepang, with two long straights, this figure increases further. Yes, 0.5 mph sounds petty-until that total up to more than 20 to 25 laps, and it should be noted that the time on the faster sections plays a much larger role in the lap time any time won in the slower parts of the circuit.
Yamaha says it cannot simply chop in the fuel tank M1 5 mm lower deck to make room for helmet Lorenzo, due to the large size of the compulsory specification Marelli ECU now mandatory for all MotoGP bikes.
This interesting situation demonstrates once again how MotoGP may be from a technical point of view. Any area you choose, parts-and a bike ride rider protection are pushed to their performance limits. Another example: have you ever thought of tear-off (parts of ultrafine disposable plastic film over the helmet visor) to be a problem? Silly, is not it? Ironically, we can ensure that they are certainly; and you will be amazed by the amount. But this situation will book for our next story.
Yamaha says it cannot simply chop in the fuel tank M1 5 mm lower deck to make room for helmet Lorenzo, due to the large size of the compulsory specification Marelli ECU now mandatory for all MotoGP bikes.
This interesting situation demonstrates once again how MotoGP may be from a technical point of view. Any area you choose, parts-and a bike ride rider protection are pushed to their performance limits. Another example: have you ever thought of tear-off (parts of ultrafine disposable plastic film over the helmet visor) to be a problem? Silly, is not it? Ironically, we can ensure that they are certainly; and you will be amazed by the amount. But this situation will book for our next story.
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