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[ Red Bull RB13 ] text by tw (February 26, 2017.)

Christian Horner commented that Adrian New Way regained its motivation in the new regulation and that 50% of development will be involved in RB 13.
The New Way involved in RB 12 last year is only about 20%.

Red Bull's 2017 machine "RB 13" was announced on February 26, 2017.
The power unit is Renault same last year.(The name is TAG Heuer.)
There is only one photo of RB 13, but see F1-Gate.com.
I will write my opinion below from the picture of the car body.

The greatest feature of RB 13 at the present time is side pod.
To the back, the top sunken obliquely, mixed with the side of the coke bottle line!
This may overturn the common sense of aerodynamic design of conventional formula machines.

The airflow at the top of the side pod will head towards the end, at the beginning the flow rate will decrease and the pressure will increase.
However, at the coke bottle line the pressure is low, so the air current that passes through the side pod top is sucked into here.
It may mix with the air current of the coke bottle and flow to the rear end while increasing the flow velocity.
With this new technical regulation, the diffuser got bigger and the rear wing became wide and low.
If we can supply a strong air current to the rear end, the aerodynamic effect obtained will be great.

In the past, the lower part of the side pod was concentrating on the shield of the air flow sucked from the side of the under side of the underbody side.
This year the under panel became wide, and the importance of the shield may be decreasing.
If we can supply a strong energy airflow to the rear end, we will draw more airflow on the lower side of the diffuser, and the downforce will increase.

The air intake of the side pod of RB 13 was small, it was slightly long in length and brought to the inside.
Since the front wheels rotate in the formula machine, the intake of the side pods is closer to the inside and the longer the longitudinal direction, the higher the filling efficiency of the air flow becomes.
This year the front tire also became wide, so it may have become this shape under the influence of the turbulence generated by the front wheels.
There seems to be a reason for the special pod wing system to be installed after tomorrow.

The pod wing at the present time is clearly a dummy for the presentation. This year 's practical use can not be as simple as this.
And the survival cell side should also be wearing a dummy plate for the presentation.
Because of aerodynamic reasons, there is no translation of the vertical plane to this area down to the bottom!
So the secret is hidden around the monocoque separator as well.

Another characteristic of RB 13 is that the nose tip is an air intake.
This is a size that exceeds the cooling requirement and should be used for a new aerodynamic system.
This system does not know until you see the photo from which the nose cone is removed.

The rear view mirror is in a low position.
The side protector is the same type as last year. It merges the left and right air currents.

The main (upper) air intake of the induction pod approached the triangle.
Instead, the air intake on the lower side got smaller.

The pull rod of the rear suspension is an angle familiar in recent years Red Bull. It is extended to the front and connected to the vehicle body side.
One rear wing stay is a swan neck shape.
I am looking forward to the pictures of RB 13 test running after tomorrow!

Drivers will continue to work with Daniel Ricardo and Max Ferstappen.

(Updated on May 3)

I will explain the contents written at the top of this page visually this time.
The area of the red ring area at the top of the side pod indicates "high pressure / low speed air flow".
The light blue ring area on the side pod side shows "low pressure / high speed air flow".

The aerodynamic package of the side pod of RB 13 is an image that if it can be said with a wing, "a high pressure flow on the upper surface of the wing is injected to the lower surface of the wing with a gap flap to accelerate the flow".
In RB 13, we encounter actively the air flow of the undercut on the side pod side that passes at high speed and the air flow gauge on the top side pod that spills outward by increasing the pressure with the stroke shoulder.
It is thought that it intends to accelerate by kicking off the air current in the yellow ring area.

If the kinetic energy of the air flow in the yellow ring area is high, the flow velocity on the upper surface of the diffuser increases, and the rear end produces the effect of pulling out more air current on the lower surface of the diffuser.
The reason for doing so is that the air has a viscosity and the vigorous air current accelerates the air flow that touched it.

The dominant factor determining the superiority or inferiority of the aerodynamic performance is whether or not the diffuser can draw more air flow from the bottom of the car.
This is very important for L / D representing aerodynamic efficiency.
Unlike a wing that works alone, the downforce (ground effect) generated at the bottom of the car body that is close to the road surface increases the efficiency of aerodynamics very much.

However, this action of RB 13 is of course not available at no cost.
When the high pressure flow on the side pod upper surface is joined to the low pressure area on the side pod side surface, the air flow of the coke bottle line becomes high pressure accordingly.
In this case, the coke bottle line reduces the effect of sucking the front undercut and the air of the monocoque lower separator into the rear end.
Then, the flow velocity on the side pod side surface decreases, which means a reduction in airflow sealability that the bottom surface of the vehicle body sucks from the outside.
But this year's technical regulation, the maximum width of the underpanel has been widened, so this sealability will not be a problem than last year.
Therefore, it can be said that the concept of the side pod in which the top and the side of RB 13 merge can be realized by allowing a wide under panel.

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