IMSA: DeltaWing explains latest development updates, gearbox and differential


In an effort to improve overall performance, the DeltaWing Racing Cars team has made numerous updates to the revolutionary DeltaWing coupe in recent weeks. As the team heads to the Mobil 1 SportsCar Grand Prix Presented by Hawk Performance at Canadian Tire Motorsports Park – a fast, flowing track that allows the innovative sports car prototype to maximize its straight line speed – team manager Tim Keene and race engineer Alan Mugglestone highlight these updates.

The main areas of development have been the gearbox and the differential. As the coupe increases in performance, the balance between the car’s light weight and the need for stronger components has been a very delicate proposition. The team incrementally added to the strength and layout of the gearbox, with wider gears, stronger bevel gears and now a stronger mounting. The team works with suppliers for these components but the bulk of the DeltaWing coupe’s parts are designed and built by the team.

The team has also successfully tested a differential, which raced for the first time at Watkins Glen. The DeltaWing was originally designed with a very complicated and experimental electronic differential that would not only help the car drive, but turn under braking. For a number of reasons, the concept was abandoned in favor of an “open” differential. The new differential performed well at tests last month and helped put the DeltaWing coupe in the top seven for much of the first two hours at The Glen, while the car’s fuel efficiency put the car in the lead during pit stops before a problem with the gearbox mounting ended the day.

Keene and Mugglestone are optimistic heading into the weekend at CTMP, where the team saw competitive times last season.

“The DeltaWing coupe is more suited to a track that allows constant momentum,” said Keene. “The Daytona Prototypes have so much more horsepower and torque off of slow corners than we do, so the more we can keep the smaller engine revved up the better it is for us – and these next two tracks lend themselves to that. Given the weight of the car, our aero is very efficient for high speed because most of our downforce comes from the bottom of the car rather than large wings or dive planes. It’s a much more efficient way to create downforce with less drag, which is the car’s basic concept.”

“The DeltaWing concept doesn’t produce a huge amount of downforce compared to a DP or a P2,” Mugglestone added. “It was designed to be a very low drag, fuel efficient car. So when you lose a small amount of downforce as we did when we went from the roadster to the coupe, it’s a much larger percentage. The switch to Continental tires – with a bit less width on the rear tire – enabled us to modify the floor and get some of that downforce back.

“With the limited slip differential we’re running now, an unloaded wheel will transfer torque to the loaded wheel. So we picked up traction in the corners, which puts the gearbox under the same stress but for longer periods of time. We’ve backed off the horsepower to the point where we know the engine is not breaking the gearbox, because we’re below the recommended torque. We’re going faster because we have more grip, both from the tires and from the fact that we now have two rear wheels driving forward. The stronger gearbox should be able to handle that.”

As IMSA finds the balance of performance between the three disparate members of the Prototype class – the Daytona Prototype, the P2 and the DeltaWing coupe – where does the DeltaWing slot in alongside its competitors?

“We’re somewhere between a DP and a P2 in speed,” said Mugglestone. “We don’t have the DP’s power, but we’re lighter weight and we have less drag, so we actually have the acceleration of a DP – but because we didn’t have a differential in the car, we haven’t been able to use it. The P2s are at the opposite end of the scale, with much better cornering ability than either the DP or us but more drag and less horsepower. If you break down the numbers, we’re actually closer to a DP. That’s why CTMP should suit the car, since we can use the straight line speed and keep momentum going.”

As the season continues, the DeltaWing team goal is simple: to maintain the delicate balance between performance, weight and reliability.

“The changes we’ve made will strengthen us for the remainder of the year,” said Keene, “and I expect to see the results of that starting this weekend. We’re looking forward to a good weekend, since fast, flowing tracks like CTMP are favorable to the DeltaWing. So getting to the finish is the priority and if we do that, I expect a good result.”

Katherine Legge joins a returning Andy Meyrick (coming off two Blancpain victories in the Bentley GT3) behind the wheel of the DeltaWing coupe at Canadian Tire Motorsports Park in Bowmanville, Ontario, Canada this weekend.

F1 Preview: 2018 Australian Grand Prix

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Save for two occasions, in 2006, and 2010, the Australian Grand Prix has served as the season-opening event for the FIA Formula 1 World Championship since 1996, and this weekend’s event will be the 21st time that the city of Melbourne has kicked off the Formula 1 campaign.

The 2018 season is the fifth one of the current hybrid power unit era, the second season of the current aero regulations, and the second under Liberty Media’s guidance.

Last year saw titans Mercedes AMG Petronas and Scuderia Ferrari duel for supremacy for most of the season before Mercedes distanced Ferrari late in the season to take the constructor’s title and the driver’s title, with Lewis Hamilton, who is now tied with Sebastian Vettel on four world championships apiece.

Four drivers on the grid have Formula 1 world championships to their name: Hamilton, Vettel, Kimi Raikkonen, and Fernando Alonso. Scuderia Toro Rosso’s Brendon Hartley also has a world championship to his name as a two-time titlist in the FIA World Endurance Championship.

So, what can viewers expect from the 2018 curtain-raiser in Australia? A handful of things to watch are below?

2018 Australian Grand Prix – Talking Points

Does Anyone Have Anything for Mercedes?

Only on one day during pre-season testing did a Mercedes driver lead the way – Lewis Hamilton was fastest on the final day of Week 1 at the Circuit de Barcelona-Catalunya.

However, all indications were that was by design, with the team focusing the majority of the second week, if not the entire second week, on long runs with their W09 EQ Power+ chassis.

Such a decision is an ominous one, in that it indicates the team is very comfortable with the amount of speed in the car and did not see a need, or desire, to show their hand during testing.

With that in mind, the Mercedes duo of Hamilton and Valtteri Bottas may yet again have the best and fastest cars, and the team looks poised to potentially make it five constructor’s and driver’s championships in a row.

Ferrari and Red Bull Look to End Mercedes Reign

The biggest threats to Mercedes are undoubtedly Ferrari and Red Bull, the only other teams to win in 2017.

And both teams displayed a lot of pace during testing, particularly in the “one-lap speed” category. Ricciardo set a lap record around the Catalunya circuit during the second week, only for Vettel to supplant that mark later in the week. Teammate Kimi Raikkonen led the way during the final day of testing.

It is unknown how that pace will translate over the course of a race distance. Mercedes appeared to have an edge on both Ferrari and Red Bull over long runs and race simulations, but there is also a theory that neither Ferrari nor Red Bull had their true long-run form on display.

Still, if a team is going to knock off Mercedes, it will likely be either Ferrari or Red Bull.

McLaren on the Rebound?

Put simply, the previous three seasons for McLaren F1 Team were a bit of a disaster. Their partnership with Honda yielded point totals of 27 (2015), 76 (2016), and 30 (2017) in a three-year venture that was defined by poor reliability and underwhelming power.

The relationship hit a boiling point last year and both entities parted ways ahead of the 2018 season, with McLaren signing a new power unit deal with Renault.

Testing went better than in previous years, though the team continued to battle reliability problems. However, all issues appeared to be minor, needling issues rather than more significant, foundational problems, as the other Renault teams (Red Bull and Renault Sport F1 Team) had solid runs with few reliability issues.

The car does appear to have speed in it, so if the reliability problems are behind them, McLaren could be in for a rebound season.

Stuck in the Midfield Again

Formula 1’s battle amongst the midfield is set to be as fierce as ever as a host of a several teams have a chance at being “best of the rest.”

Sahara Force India has been the frontrunner from the the midfield teams each of the last two years, finishing fourth in the constructor’s title in both 2016 and 2017, though if the steady conflict between drivers Esteban Ocon and Sergio Perez continues through 2018, it could hamper their efforts significantly.

Renault Sport F1 Team and Haas F1 Team look to improve on their 2017 form, while Toro Rosso is in a new partnership with Honda power units…and has experienced a surprisingly smooth pre-season as Honda’s 2018 platform looks significantly better, with the team enjoying a solid run of testing with few, if any, reliability problems.

Williams Martini Racing and Alfa Romeo Sauber appear to be at the back of the pack entering the season, but both could battle for points finishes if those ahead of them falter.