Motorcycle News - MotoGP Bikes Brake Longer Than Superbikes At Misano
Fascinating information from Brembo about how MotoGP machines differ from production-based Superbikes. Hint: they’re much faster.
Begin press release:
The MotoGP World Championship season is heading into its last third of the season at this weekend’s San Marino and Rimini Coast Grand Prix round at the Misano World Circuit Marco Simoncelli, September 7-9.
Located about 12 miles from Rimini and just over a mile from the Adriatic Sea, in 2012 the track was named for the Italian rider who tragically lost his life seven years ago on the Sepang circuit.
The Misano speedway was designed in 1969 and over the course of the years, has undergone numerous changes until it completed its current 2.62-mile (4,226 meters) configuration in 2008.
The World Superbike Championship is also held on this track and although the Superbikes use the same track configuration, brake use is very different. The greatest difference is at the Curvone (Turn 11) because the MotoGP riders are obligated to tap their brakes (1.3 seconds) in order to drop about 25 mph, while the Superbikes can take the corner at full throttle since they enter it at a lower speed.
Naturally, the braking distance for the MotoGP bikes is shorter too because they use carbon brakes, which rules have banned from Superbike racing. This requires the MotoGP riders to exert more force every time they pull on the brake lever.
The extreme winding nature of the track prevents the bikes from reaching 186 mph even once. However, there are five corners that have to be taken at than 56 mph, so deceleration is significant. Another issue, in terms of cooling down the systems, is the air temperature: During the 2016 race, the temperature of the tarmac was over 109°F.
According to Brembo technicians, who assist 100 percent of the 2017 MotoGP pilots, Misano World Circuit Marco Simoncelli is fairly demanding on the brakes. On a scale of 1 to 5, it earned a three on the difficulty index, and out of the races still to be contested this year, this same score was given only to the track in Valencia.
The demand on the brakes during the GP
Over the 27 laps of the race, each MotoGP rider turns to his brakes for a little less than 13 minutes and half. Summing up all of the force applied by a rider on the Brembo brake lever from the starting line to the checkered flag, the result comes in at about 2,491 lbs. (1130 kg), compared to the 1,796 lbs. (815 kg) applied by the Superbike pilots, but they race for 21 laps. On a single lap, MotoGP riders apply more force than the Superbike pilots, 92.3 lbs. (41.9 kg) compared to 85 lbs. (38.8 kg).
The average peak deceleration of the MotoGP bikes on this circuit is 1.19G and that of the Superbikes is 1.06G. Although 1.19G may seem moderate but it is 0.05G more than the peak deceleration that an Infiniti FX45 experiences.
The most demanding braking sections
For both the Superbikes and MotoGP bikes, braking at the Quercia (Turn 8) is the most challenging on the track: The MotoGP bikes slow down from 182 to 49 mph (294 km/h to 79 km/h) in 4.8 seconds and 222 meters. The Superbikes arrive going 14 mph (24 km/h) slower but need a few extra yards and 4.9 seconds to make the turn.
In this corner, the MotoGP bikes surpass the Superbikes also for the peak deceleration (1.5G against 1.3G) and for the load placed on the lever 13 lbs. against 11 lbs. (6 kg/5.3 kg), but they manage to contain the pressure on the Brembo HTC 64T brake fluid to 10.4 bar while the Brembo brake fluid in the Superbikes reaches 11.4 bar.
Braking on the first corner after the starting line also goes over 200 meters: The speeds drop 96 mph (156 km/h), going from 168 to 71 mph (271 km/h to 115 km/h). For the Superbikes, the gap in the speed is lower 86 mph (140 km/h), but the use of steel discs means that the braking distance is much greater, up to 823 feet (251 meters) more.
The pressure of the brake fluid is higher and the load greater on the lever for the MotoGP bikes at the Misano (Turn 16), which is downhill: 10.6 bar (more than triple a bottle of champagne) and 13 lbs. (6.1 kg).
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September 27, 2018 at 01:11PM