Some interesting analysis from Gary Anderson;
So, what is it about the RB19’s DRS that gives it this advantage?
Start with DRS – then build the rest of the car
The DRS is now a more intricate and integrated part of the car design than it used to be. When it was introduced in 2011 it was a simple tool to aid overtaking. The rear wing flap would open on the straight, drag would be lost, making a pass easier.
Today, a team would look at DRS affecting the whole back of the car from the design stage. The under-floor, so critical with the current regulations, creates probably in excess of 50 per cent of the total downforce of the car, with the wings producing the remainder. The rear wing, then, is a crucial part of this.
When it comes to DRS, the more drag you can get rid of the better, but it is not about just dumping the drag from the rear wing when the DRS flap is open. It is far more effective to lose drag from the whole rear of the car: in other words the top wing, the beam wing and the diffuser.
How Red Bull’s genius package works
All three of these elements – top wing, beam wing and diffuser – need to work in harmony so that losing drag from one means you lose drag from them all, increasing top speed even further. The rear wing has to talk to the beam wing and the beam wing must talk to the under-floor. When DRS is opened the beam wing produces less downforce and changes its flow structure which then affects the under-floor which changes its flow structure. You lose downforce on the whole lot but more importantly you lose drag.
There is no special trick to Red Bull’s DRS advantage, rather that they have a better car and have their rear end working together much better than their rivals. Even without DRS, the RB19 is fast in a straight line. It has more downforce than its rivals too, which means it is fast around corners and does not have as much drag as other cars.
If you look at the Mercedes in comparison, the rear is nervous which means they carry more rear wing to help them through the corners but this hampers their top speed down the straights. The Red Bull creates more downforce from its under-floor which in turn means they need less downforce from the rear wing – which itself is quite inefficient aerodynamically – which means they have a more efficient package to begin with.
As mentioned, it is not just about losing drag from the rear wing. If it was just the rear wing downforce that Red Bull were dumping, they would be dumping less drag because the rear wing is not producing as much downforce as the Mercedes.
This shows how crucial it is that the whole back of the car works together – and how well it does. In short: Red Bull have a very good understanding of how to make the rear of the car work as one. It appears as if their DRS is more effective, but really the whole car is more effective.
What can their rivals do?
The difficulty for other teams in catching up in this area is that they cannot just copy the RB19’s rear-end design. It is not even the cost cap that makes it difficult, it is more that they do not have the understanding of how the upper wing, beam wing and under-floor are interacting.
They are perhaps treating those three parts as individual elements. They seem to be struggling to get those elements to work in harmony, just like they have struggled to reproduce the downforce that the Red Bull under-floor produces. It is a lack of complete understanding and that is ultimately being shown in the standings and the half-a-second a lap deficit of the next best car over a race distance.