Latest News - 2022
A new wind blows in the ranks of the multicultural PERRINN team.
First and foremost, we have an exciting news to disclose : PERRINN and Onshape have sealed an agreement to join forces. We are very happy that Project 424 is now officially supported by Onshape, a ground-breaking design tool that enables all our members to collaborate seamlessly directly in the browser. Their innovative approach to collaboration is perfectly aligned with PERRINN philosophy and distributed organization. Therefore, this partnership is a huge milestone in our journey as the PERRINN digital team vision would not be possible without such resources. Concretely, Jay, a PTC Onshape product manager, has joined the PERRINN team and will contribute to the design and development of our 424 electric Hypercar from now on.
At the same time, Gilbert, an experienced expert in lightweight engineering, has decided to offer his precious support on all topics linked with mechanical design. Given this influx of amazing skills, the timing is perfect to launch a new task force on 424 rear end integration with topology optimisation. As usual, every step of the methodology is greatly documented and openly shared with all members so that everybody learns and participates in the process.
As we are on the subject of 424 design, nothing is set in stone. Various areas of the car are undergoing tremendous changes. The front splitter has been fully remodelled in order to be easily customized as aerodynamic development goes on. We did not have to wait very long before it was modified to fit the whole Nürburgring aerodynamic package : the splitter outboard curl was redesigned and the splitter main plane was lowered by 10mm. A revised splitter fence was also profiled in order to solve some instability at low ride height and the 2 dive vanes were optimized. We also have integrated the new Brembo brake callipers and discs in the full car assembly. Therefore, we have designed disc bells accordingly while suspension geometries are being adapted to fit with the new “short wheelbase” philosophy of 424. As a reminder, the wheelbase was shortened by 150mm down to 3000mm whereas the rear pushrod is now made of carbon and titanium which results in a mass 50% lower compared with the previous version of this part. Inside the cockpit, the layout has evolved too as the dashboard was simplified and detached from the steering wheel, to cite but a few examples.
As we are heading to the summer break, 121 CFD (Computational Fluid Dynamics) runs have been performed in 3 months (!) and everything is working according to the plan up to now : we are satisfied with the progress we made on the Nürburgring aero package over the last few months and we found a better weight and aero balance solution. Lately, the redesign of the rear transmission has had a significant impact on front aerodynamics and current work consists in recovering the right aero balance. All simulation runs have been performed with a half car model and we are now switching to a full size CFD model to study yaw, steer and roll sensitivities. Soon, this aero development of 424 will slow down a bit before returning to its normal rhythm in October on crowdfunding fuel. Indeed, this “pause” will be dedicated to the implementation of the crowdfunding campaign with the design of the dedicated webpage now that all the specificities of this fund raising process were defined and agreed by the whole team. In parallel, the strategy around potential sponsorship by larger companies from the crypto world is being refined as we go.
The battery cooling simulation is also running at full tilt. Now that the 2D and 3D models have delivered some interesting data, the 1D model has our full attention in order to replicate it inside the 424 driving simulation to get live battery temperature in telemetry.
As far as the DRS (Drag Reduction System) is concerned, the topic is still open. In the 424 driving simulation, we have defined “no DRS segments”. It means that at some places of the Nürburgring track, the DRS is automatically closed to increase downforce and prevent the car from taking off in the worst case scenario. Of course, this system has requested some development which is not directly converted into pure performance…but safety is our very first priority. We have covered some laps with this new feature and the result is undeniable : “no DRS segments” is the way to go to get a race car the driver can trust 100%.
Regarding the 424 Unity simulation developed in collaboration with VPP, torque maps implementation and steering force feedback optimization are the next tasks to be accomplished. Meanwhile, there is much to do to ensure a perfect compatibility with all hardware solutions. Exciting times ahead !
See you soon on the official PERRINN LinkedIn page!
It is decided : 424 will use a high downforce aero package for the Nürburgring lap record attempt. The design is yet to be finalised but the various simulations performed show that it is the right way to go.
Here we are : 2022... the year that will lead us to the Virtual Lap Record attempt on the Nürburgring Nordschleife, so exciting!
We are ready to gear up for a new year full of developments, learning, emulation and fun! To be honest, we have never really paused as we are thrilled by passion.
At the very beginning of the month, an updated roadmap was built to disclose accurate objectives for each quarter of 2022, 2023 and 2024. After breaking the Nürburgring lap record virtually in 2022, we aim at repeating the performance in real life mid-2024.
The 424 rear suspension design finally came to an end with the creation of the barrel and the rear brake disk cooling duct that was adapted to the specific needs of the Nordschleife, in accordance with the conception of the specific Nürburgring aero package. It was integrated to the 424 CAD master assembly. By the way, this brand new version of the rear suspension has already been taken care of by our 3D artist and underwent a full retopology to be included in 424 Unity simulation immediately. Doesn't it look nice? Bolstered by this experience, the front suspension is currently receiving our full attention.
The Unity simulation keeps being improved. The best sector times are now automatically identified on the player's screen and merged to display a reference lap time. Autopilot uses this data as well as the dash delta time on the driver's steering wheel. Comparing various car configurations in the Unity simulation will be very straightforward now that this tool is at our disposal!
In addition to a team of very talented individuals, achieving our goals will require some funding. This is why we will soon open a crowdfunding platform where the public will be invited to buy some digital COINS and own a part of our team.
Without you, there's no us. Join us.