Delving into Honda's bodywork, the "RC/SO" (Chevy uses the same RC/SO designation for their kit) features a front wing package that is by far the most complex aerodynamic system ever fitted to an Indy car. Using the base Dallara front wing element as the starting point, Honda loaded each side of the nose with three exceptionally long and tall cascade elements. The cascade array serves as a downforce-producing deflector that significantly blocks the face of each front tire, and in another notable departure from the Chevy kit, the inside of those cascade elements lack an endplate. The five exposed element tips allow Honda's front wing package to generate vortices, which help to concentrate the air flowing off of them while generating additional downforce.
Where the Chevy kit uses a single element that stands tall on a post mounted on the outer edge of the front mainplane, Honda has taken a more aggressive approach by fitting a tall outer and inner endplate that features five wing elements that sit in front of each tire. That system also acts like a ramp to divert air over the tires.
Altogether, and based on what Honda is willing to show the public (and Chevy) a week prior to its official debut at Barber Motorsports Park, 17 wing elements are packed onto the front of the car. With some of the additional aero kit options teams are allowed to use, and with an understanding that both manufacturers have likely kept some components hidden until their cars hit the track at Barber next Monday, more elements and other components could be seen.
Beneath the cascade elements, two strakes can be seen, and a Gurney flap is also present on the outer edges of the top elements to extract air from beneath the wing array. That Gurney is almost capped by a fence on those upper elements. Moving down to the front wing endplates, a gap is maintained between the inner portion of the endplate and the top cascade elements that bend down and attach to the main plane to further accelerate and extract air headed out and around the front tires.
Honda's front wing package could cause fans to stop and spend 30 minutes trying to sort out how all of the curves and shapes work together in an integrated manner to produce staggering amounts of downforce.
Chevy Honda AK Comparo Sidepod InletMoving back to the sidepods, Honda has also taken a different approach to their design than Chevy. Chevy separated their sidepods from the rear wheel ramps, giving air a chance to flow around the sides and between the gearbox and rear wheels, Honda has gone with full-length sidepods that extend out to the rear tires. In place of the familiar ramps that send air over the top of the drag-producing tires, Honda has taken an opportunity to achieve the same effect with a pair of wing elements, adding more downforce to the aero kit. In place of Chevy's flow conditioner that sits atop each sidepod, Honda uses a set of smaller ramps can be found on the side of the sidepods, and they appear to pull air from the opening in the floor and divert it up toward the bigger ramps. Chevy's use of a wide, rectangular radiator inlet profile is different than the more closed and rounded inlet on Honda's kit, and at the back of the sidepods, exit ducting of some sorts is shown beneath the big tire ramp elements. A channel can also be seen on top of the sidepods adjacent to the rear tire ramps that allows air to be drawn down into the flow.
Honda's engine cover uses the overhead air intake to feed its twin-turbo V6 engine, meaning both manufacturers have opted for this solution, yet the similarities end there. Chevy's engine cover makes an immediate downhill run after the roll hoop, while Honda's heads straight back a considerable distance before angling downwards. Honda has also added a narrow fin to the spine of its engine cover to provide yaw stability – a similar, albeit compact version of the fin found on LMP1 and LMP2 sports cars.
Chevy Honda AK Comparo Rear Wheel GuardsThe final section of Honda's aero kit features a downforce-dripping take on the rear wheel guards and rear wing. Using the stock Dallara mainplane per the aero kit rules, Honda has added two elements and massive endplates to the back of the car, and at least in these renderings, the endplates are not vented like the Chevy kit. The rear wheel guards also show a different line of thinking as the Honda's are relatively flat on top and sport two dihedral wing elements – effectively extending the width of the rear wing. The Chevy, in their renderings, use one element, and the wheel guards are more rounded.
Honda has gone about its treatment of air flowing through the wheel guards in a different manner as well, with slots and rectangular openings made at the rear of the units.
Combined, more than 100 individual pieces comprise Honda's aero kit. The changes are so significant the nose of each Honda Indy car now carries the official red "H" badge.