How the Velosense Formula 1 probe is helping Jumbo-Visma dominate time trialling

Ahead of the final season test of this year’s Tour de France, we want to look back to the first time trial, and specifically an aero sensor we recognise on Jonas Vingegaard’s Cervelo P5.

We recognise this sensor on Vingegaard’s bike as he manager out on the morning recon, and once again, as the group returned, squad machinists removed it from below the handlebars. Vingegaard went on to finish third in that time trial a few hours later, the first glimpse of his GC potential at this Tour de France. Check out our time trial tech gallery to see those photos. After several speeches, we can now confirm the sensor is from VeloSense, aerodynamic sensor specialists in Formula One and cycling.

In short-lived, it’s designed to measure aerodynamic draw, breath fasted, elevation, gust direction, and more in real meter, which units can then help along with power and other data to optimise place, gear, and pacing.

The Velosense Ventos is a wind speeding, yaw slant and altitude quantifying aero sensor.

Velosense is a British company set up by Formula One aerodynamicists Barnaby Garrood and John Buckley. Both humen are keen cyclists and wanted to bring their aerodynamic knowledge to the cycling world.

I spoke with Buckley, who corroborated the sensor on Vingegaard’s bike is from Velosense:” That is a kind of our Ventos sensors on a central attach. It sets wind fast, tack, and altitude .”

The Ventos is a variant of Velosense’s patented Formula 1 aero probe.

According to the Velosense website, Buckley and Garrood started with their patented examination designing from their Formula One days, which measurements wind quickened and yaw directions.

Yaw angle and accurate elevation have proved a challenge for aero sensor decorators and producers. The Ventos probe calibrates yaw slant, and Velosense claims altitude accuracy is within 20 cm. The elevation accuracy is particularly important for an aerosensor to provide accurate CdA estimates and this tier of accuracy is almost unheard of.

A better photo of the Ventos on a duration experiment motorcycle.

Although he couldn’t go into any specifics of work with teams, Buckley did say ” We have been working with selected spouses to improve their performance, and in this case they are value the wind speed and future directions prior to the opening of the TT”

” The primary used to support the sensor is assessing aerodynamic draw( CdA ), but it can also map the wind speed and direction along a track to provide a team’s equestrians with detailed information about the wind around the course, highlighting any areas that might have increased gusts .”

The Ventos has three main uses;

Traverse lap testing: the equestrian ends an out and back loop starting and finishing at the same place. Velosense claims the ventos can measure CdA with velodrome testing levels of accuracy. Snapshots: Velosense can analyse any session using an algorithm that automatically picks out acceptable slice within a trip to move a equestrians CdA and ability to maintain position throughout a travel. The algorithm checks airspeed, braking, cornering etc ., to find these segments and specify a snapshot of a rider’s CdA at variou phases in a ride. Realtime CdA and Poweradvantage: When paired with a compatible honcho section, the Ventos can calculate and expose “realtime” CdA. This real-time is actually a period wheeling median. Velosense currently recommends a 45 seconds average but are working on technology to get this down to precisely 15 seconds.

Velosense also has ambitions to use GPS to create a section-based average. As the technology improves, the hope is that this section-based testing “shouldve been” similar accuracy to that of the pas testing.

The Ventos too calculates what Velosense calls a rider’s Poweradvantage, using airspeed and mas prestige. This compares the rider’s current position to previously acquired plight data to estimate the number of watts a equestrian could gain or lose compared to the ” ideology ” statu.

Velosense indicates this feature could help riders determine whether an aero or upright arrange will be best on an uphill.

Buckley couldn’t go into too many specifics, but explained that the Ventos pairs to another sensor from Velosense, the Zenith, to measure the rider’s head position, torso location and if the rider is sat or abide. All this is used in calculating the Poweradvatnage metric.

Velosense believes pairing mas position and aero sensor data together will enable riders to perfect its own position, asses how sustainable the position is, and get a better understanding of how their body position feigns aero draw.

While Buckley could not confirm who the selection of spouses are, we can make a fairly good guess.

Velosense is currently merely supplying sensors to selected collaborators as it refines the final present, but its long term plan is to deliver economical and accurate aero testing to the public.” Velosense’s purport is not just to measure a cyclists lag, but to combine knowledge of body position and draw to allow rider’s to travel more efficiently and comfortably ,” Buckley said.

” Our long term goal is to make a consumer maneuver that they are able to make aero testing more inexpensive and effective for competitive cyclists. Currently “were working with” adopted partners to improve rider performance and reduce fatigue through our aerodynamic and mas sensors. I cannot disclose who “were working with”, but I can confirm that sensor in the picture is a kind of our Ventos Aero Sensors .”

John Buckley

What is perhaps most interesting is that both Jumbo-Visma and Mercedes F1 crews are using variants of the Velosense probe, which speaks to Velosense’s experience in the aerodynamics orbit. Jumbo-Visma has dominated go trialling this season, and Mercedes has won the last seven world championships.

It is expected that Jumbo-Visma will again use the sensor during recon ahead of Saturday’s TT. I requested Buckley why the team would use the Ventos sensor on the morning of the first time trial, as it seemed unlikely the team would adjust rider situations so close to a Tour de France TT.

” The intellect for flowing a sensor on the recon lap on the working day of the race is that it affords the team an accurate measurement of the wind speed and future directions over the part trend” Buckley justified.

Mechanics removed the Ventos from Vingegaard’s P5 immediately following the recon go.

Of course similar data is available with modern climate apps and a local weather station. Buckley asked” these published amounts are taken at 1.5 meters above the foot in a clear location. The local air hasten and future directions which the cyclist actually meetings at different locations on such courses can vary by up to 90 deg depending and half the rush.

” A simple lesson would be a street with constructs along both sides. The wind counseling must change for it to pass around the building. Therefore the wind in municipalities generally passes along the direction of the roads. The effect is called’ canalisation’ and can also occur with mounds, canyons, hedgerows, etc .”

Buckley explained that Team Jumbo-Visma exerts this information to create more detailed race approaches, communicate areas of unexpected wind changes or gusts in “todays opening”, and inform paraphernalium pick decisions.

” During the preparations for the Velosense aero examination, we often understood sharp spikes in gale which we first attributed to hardware or software troubles. When we mapped these spikes onto GPS we would usually find that they corresponds to gates in fences or gaps between buildings. We are now able to provide wind information along an part route establishing particular point where the wind speed may spike or the wind angle modifies is important to note and the equestrian can approach those sections on the upwind place of the road, which increases the the opportunities of being blown off the road. If high winds are severe, a less aggressive rotation option may be chosen .”

Buckley too interpreted the team could use the data collected on the morning recon for equivalence and analogy.” For climbers, watts per kilogram is the yardstick, for epoch trialists, it is watts vs CdA. Therefore in order for crews become competitive, they do not just need to know their riders influence on the day, but also to have some measure of their aerodynamic draw, as it often varies in races from training and the wind tunnel .”

I spoke to Mathieu Heijboer, head of performance at Jumbo-Visma for an upcoming Nerd Alert podcast and asked about about how the team uses the Velosense Ventos.

Heijboer recited the value of creating a wind profile for a track on hasten epoch to inform pedal excerpt, and likewise explained how the team consumed the Ventos to optimise Vingegaard’s time test location despite Covid-1 9 lockdowns in Denmark over the winter.

Somewhat astonishingly, Heijboer illustrated Vingegaard has never been in a air passage and was the fastest rider in the stage five time trial not to have optimised his position in a puff passageway.

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