[ Force India VJM09 ] text by tw (Original text : February 29, 2016) [ Japanese language ]

(English translation May 18, 2016)

The Force India "VJM09" has started running in the test, but from around February 24, 2016.
Photos, please look at the F1 Tsushin.
The following is my opinion.


This machine looks like a minor up-grade. That's my first impression.
Compared with the VJM08 B spec, not see the big advanced point.

What if there is if different point...,
(This is a slight difference, but do not know certainly whether.)
rake angle possibly is, it might have become stronger.
The rake of the racing machine, but the body of the anteversion angle.
That's flat bottom regulation, rake is the critical element in the aerodynamics of the underbody.
By developing the aerodynamic strongly the rake, car body underside of downforce can be increased.

And rake is also related to the front wing.
If the rake is strong, front wing and the road surface becomes close, down force is increased.
Front wing, but because of the use of the ground effect.


Force India is a feature hole of the nose.
High pressure of the nose top surface, by moving to the nose underside,
increase body the lower part of the airflow.
However, since the holes of the nose is narrow, interference resistance occurs.
But of underbody aerodynamics for high efficiency, it is a good idea to increase the under-airflow.

Then, the air in the nose lower, S duct moves upward.
This is the kinetic energy of air under the nose is activated.

Modern aerodynamic, can be calculated in a precise window tunnels and high-performance CFD.
From that it can consider whether the idea of comparison is advantageous or disadvantageous.
However, wind tunnel nor CFD, rather than tell the correct way tool, human wisdom and sense is not meaningless.


Top speed of the car, it is the point where the running resistance and the output of the power unit are balanced.
It includes air resistance to the kind of running resistance, but it increases with the square of the speed.
Therefore, in the high-speed zone, it is advantageous to give priority to low-drag than horsepower.
In the amount of cooling of the side pod, to adjust the balance of horsepower and air resistance.
(This is the story of the design phase of the machine.)
To outsiders, able to understand it in the air intake of the size of the side pod.
They want to low-drag, air intake and the radiator is small.
If they focus on horsepower, it is big.
Side pod air intake of the VJM09 is small.

Intake of shape, has been changed to the square. 2015 season was a triangle.
If square, side pod the lower part of the air flow is increased.
At that it can reduce the air the vehicle body underside would inhale from the side.


Induction pod next to the side of the camera, has been installed at an oblique angle.
This may correspond to 20mm the raised side protector.

The engine cowl and has a volume at an oblique angle, similar to Toro Rosso.

When viewed from the side, induction pod has been lowered from the previous point.
Therefore, the purpose triangular fins to meet the regulation of the area was needed.

At the end of the coke bottle, wearing the cowling of the gap.
This is the idea that they have learned from Mercedes.

There is a main exhaust pipe on the upper side.
The exhaust pipe of the two wastegate small on the lower side.

Monkey sheet is large, there is an effect that suck out the exhaust gas.

It has marked the fast time in the test.
However, what to test for the purpose, so do not know the external person, evaluation of simple machine is impossible.
But fast time is not a negative factor. Thus, it is not the atmosphere to spend a season of disappointment.

Driver's duo of Sergio Perez and Nico Hulkenberg.

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