As we continue to digest all the new information that came out of last week’s First Drive Event with the 2020 Corvette Stingrays in Las Vegas, there is a new “Mode” to discuss that most Corvette enthusiasts have never heard of.
The 2020 Corvette Stingray has several “modes” that help drivers get the most out of their cars. We are already familiar with the regular driving modes that feature settings for Weather, Touring, Sport and Track, as well as the two customizable modes called MyMode and Z-Mode. But what you may not be aware of is that the 2020 Corvette Stingray’s equipped with Magnetic Ride Control also features a “Flying Car” mode.
Well, it is the 21st century after all!
Corvette’s Vehicle Performance Manager Alex MacDonald is responsible for the chassis tuning of the new Corvette and he was tasked with explaining much of the on-track performance capabilities of the new Corvette to those at Spring Mountain last week.
For the C8 Corvette, engineers have rolled out version 4.0 of Magnetic Ride Control with the biggest change to the system is the use of accelerometers rather than position sensors that measured wheel height. Here is the slide that was offered on the new Mag Ride for the C8 Corvette:
The Magnetic Ride Control is tied into the Corvette’s Performance Traction Management system and that’s where the Flying Car Mode comes into play.
When your crest an incline and the Corvette’s wheels are off the ground, they will spin faster like they are on ice or another slippery surface because there is no resistance. The performance traction control senses that and sends commands to slow the wheels. But that’s not the best reaction when on the track. The system now senses when the car’s front wheels leave the ground (and assumes that the rears will be leaving as well), and the system tells the performance traction control to ignore it because it knows that it’s temporary and that all four wheels will be back on the ground momentarily.
Here is Alex talking about the Flying Car Mode:
“The other interesting note about MR is that it communicates with the performance traction system and it tells that performance traction system that if the front wheels have just gone over a big crest that we know that one wheel-base later the rear is about to go over that same crest, we can adapt the traction control to work in that situation and we call that Flying Car Mode, which is a cool name for it, because it does detect when the car is airborne and we can alter the chassis controls to deal what happens when the car lands.”
Video by Keith Cornett
With the highest performance versions of the seventh generation Corvette, customers were forced to make a choice. Did they want their car to have the highest possible top speed, or did they want to sacrifice some of that by bolting a slew of aerodynamic aids to their car for maximum cornering ability?
We would love for Chevrolet to take that decision out of the ordering equation for buyers of the upcoming Z models and the Grand Sport. They could give buyers the best of both worlds with the incorporation of Active Aerodynamics.
Active Aerodynamics can take many forms, from grille vents that close at high speeds to streamline a car, to suspension that lowers at speed to reduce lift. We know that the Corvette team would build a fully functional system that integrates several of these technologies into a cohesive package, just like they did on the C7 ZR1’s chassis-mounted wing and innovative balancing front underwing, but what we mostly want to focus on here is the most visible piece of such a system, the rear wing.
This unit would elevate both the performance and even the prestige of GM’s looming halo car. There are several benefits of an active rear wing that accompany their off-the-charts cool factor.
1. An active rear wing can be lowered, causing it, for all intents and purposes, to disappear, along with any drag that it was creating. Top-end General Motors Products have become so fast that the most track-worthy editions have suffered at the dragstrip because of massive fixed wings. The effects of the C7 Z06/Z07’s wickerbill spoiler have been well documented. Chevrolet officially listed the top speed of ZR1’s with the “big-wing” ZTK package as 10 MPH lower than their stock counterparts, and the Camaro ZL1 with the 1LE package has proven slower than the car it is based on, even in distances as short as a quarter-mile. Allowing these serious track performers to retract their wing, and the ZTK/Z07/1LE models become the best version of their respective model-line with no excuses or asterisks, which is what buyers that dole out more funds expect.
Photo Credit: https://www.sciencelearn.org.nz
2. Just as these wings can retract to reduce drag and improve top speed, they can be “actively” placed in full “attack mode” for maximum downforce in the corners. This increases cornering speed, stability, and driver confidence which can lead to drastically lower lap times.
3. Upon hard braking, an active wing can also go vertical, transforming into an air brake. This assists the actual brakes, resulting in shorter stopping distances. It also keeps more weight in the rear of the car, again helping with stability and, especially in a rear-wheel drive car, improved corner exit speeds.
Photo Credit: Car Magazine (UK)
All three of these traits brought to the table by an active wing radically assist the driver and make the car faster in all aspects. The coolest thing is that, with the right programming, the wing does all three automatically with seamless transitions, and, did we mention how awesome they also look?
There has been speculation about Active Aero coming to the Corvette for several years now. These rumors were fueled by GM’s own patent filings which showed a sketch of a C7 fitted with advanced aerodynamic trickery. We think the top dog mid-engine offerings are the perfect place for the General to finally deploy this technology that can already be found on the majority of the world’s supercars.
New York Yacht Club’s America’s Cup team, American Magic have released a video of their test boat doing a spectacular nosedive while sailing off the team’s base in Newport.
The team is now in Pensacola, Florida their training base during the northern hemisphere winter.
They have taken their AC75 Defiant to Pensacola.
The video is shot from one of the team’s drones flying above and astern, whether the nosedive was intentional (to get test/simulator data) or accidental is not clear.
While splashdowns (where the bow enters the water with a spectacular splash) are commonplace on the larger AC75’s, only one boat (and maybe two) have capsized, most of the foiling mishaps have occurred on the test boats. American Magic’s test boat, named “The Mule” is designed (apart from the 38ft production M38 hull) to be as close to an AC75 as possible.
The reason for this nosedive is two-fold. First, the boat is flying very high on her foils, and second, the rudder wing breaks free of the water about midway through the low-resolution clip, and at that point the nosedive becomes inevitable. The “phenomenon” is common to all boats that have similar foiling physics such as the AC50, F50, AC72 and AC75. In the AC50 it was reckoned that a rudder wing contributed 500kg of downforce when immersed in the water, and if it breaks clear of the water then that 500kg of downforce is suddenly released triggering the nosedive.
It is not known if The Mule was flying under manual or automatic flight height control at the time.
Within the leadup to the nosedive The Mule is flying high and level, rather than going through a rear up, followed by a crash/splash which is the common routine on an AC75.
At the end of the video an on-board sequence shows the top of the rudder post being moved fore and aft – this controls the angle of attack of the wing rudder – and it is this movement coupled with the high flight height that triggered the incident causing The Mule to trip over her foils, nosedive and then capsize.
Source Sail Word