©
HPC
3. Controls
Introduction
The smooth use of all controls is a fundamental attribute of the HPC driver.
Any change in the driving process, such as in speed or direction, should
be executed with smoothness and minimal physical inputs. A vehicle driven
smoothly is inherently more stable and the resultant ride more comfortable
for driver and passenger alike and is the hallmark of an HPC
drive.
Competencies
- Ability to handle all vehicle controls smoothly and sympathetically
regardless of speed or driving environment.
- Ability to display an unhurried, measured and planned use of all inputs
- smoothness always linked with the driving plan, giving sufficient time
for all actions to be carried out without rushing.
Demonstration
- The HPC driver will
aim to minimise the incidence and intensity of a given input. The initial
and final phase of any given input should be gradual and progressive,
allowing the vehicle to prepare for whatever change of state is being
asked, be it braking, acceleration or steering.
- Irrespective of external speed a driver's actions will appear to be
measured and unhurried, and the driver will consider the comfort of any
passengers. Safety, however, is always the first priority, and the HPC
driver will always be ready to sacrifice smoothness for safety when necessary.
- All use of the controls will be blended seamlessly together and in
plenty of time before reaching the hazard.
Accelerator
Introduction
The use of the accelerator and associated acceleration sense is one of
the defining characters of the HPC
driver. Roadcraft defines acceleration sense as "the ability to vary vehicle
speed in response to changing road and traffic conditions by accurate use
of the accelerator".
Competencies
- Ability to utilise the power of the vehicle smoothly, accurately and
progressively.
- Ability to plan the phases of acceleration to match the prevailing vision.
- Ability to use acceleration in combination with other controls to maintain
optimum stability.
Demonstration
- From the start of a journey the HPC
driver will blend the application of accelerator with clutch to ensure
a seamless and smooth pickup, with no firm application of accelerator
until the clutch is fully engaged.
- The use of the accelerator will be tapered and progressive; both the
initial and final stages will be gradual with firmer application progressively
applied as appropriate. In preparation for a gear change the accelerator
will be smoothly blended to ensure a seamless transition.
- In corners and bends the driver will use the accelerator to optimise
vehicle stability.
- The driver will appreciate the effect on the stability and handling
of a car as a result of operation of the accelerator.
- The driver will demonstrate the ability to assess the cut-off point
and transition from acceleration/constant speed to reduced speed for the
hazard, using deceleration skills alone or a combination of deceleration
and braking on the approach.
Clutch and Gears
Introduction
The efficient use of the clutch and gears on a manual car are interdependent.
The HPC driver should be
aware of the point of clutch engagement (the biting point) and avoid the
full application of power until the clutch is fully engaged. The use of
the clutch should be progressive and smooth for avoidance of premature wear.
The selection of the correct gear for the speed to negotiate the hazard
should be carried out as part of a systematic driving plan and well before
the hazard is negotiated. To achieve a smooth change the driver should be
able to match the engine revs with the speed of the car with consideration
of the role of the synchromesh and flywheel characteristics of the vehicle.
Competencies
- Ability to use the gear lever sympathetically and positively to make
smooth gear changes.
- Understanding of the flexibility and power delivery characteristics
of the gear ratios.
- Ability to accurately and seamlessly match road speed with engine revs.
- Understanding of the technique of Heel and Toe (optional).
- The ability to use an automatic gearbox, or derivative, with an understanding
of the characteristics and optimum use of that system.
Demonstration
- Drivers will familiarise themselves with the power characteristics of
each gear and, in the early part of a drive in an unfamiliar car, will
take time to explore the full range of the gearbox at the earliest opportunity.
- Gear selection is always appropriate to the speed and conditions.
- The driver will display consistent and precise gear changes and the
gear lever will be handled positively. Changes will be executed smoothly
and seamlessly.
- The driver will use the technique of double declutching, together with
boost or sustained revs, to assist the gear changing process when circumstances
require it, and will understand the technique of 'Heel and Toe' and when
it may be appropriate. (At Entry Level standard a driver should be able
to explain the theory of Heel and Toe without necessarily giving a practical
demonstration).
- Optional - Automatic and electronically assisted gear selection systems.
The driver should be familiar with, and able to explain, the characteristics
of the automated/ semi-automated transmissions systems of the vehicle.
The driver will show an understanding of the effects of downchanges induced
by 'kickdown', and the characteristics and appropriate use of any manual
overrides or alternative settings such as 'Sport' mode.
- The driver should be able to use the accelerator to assist with smooth
changes where necessary, and be aware of the effects of the gearbox automatically
changing down during prolonged braking.
Braking
Introduction
Excellent braking control is a fundamental attribute for the HPC
driver. As part of the vehicle familiarisation phase the HPC driver would
be expected to explore the capabilities of the braking system; firstly a
static brake check, then a moving brake check. Some braking systems employ
electronic assistance that sense unusual or emergency braking and a driver
would be expected to be fully aware of the braking capability of the vehicle.
Competencies
- All braking to be carried out progressively, smoothly and accurately.
- Understanding of electronically assisted braking and stability systems,
and the characteristics of cadence braking techniques
- Understanding of the effect of braking on the stability of the vehicle.
- Ability to stop the vehicle in an emergency situation under full control.
Demonstration
- The normal braking action is expected to be tapered, progressive and
smooth, ensuring maximum stability and comfort for any passengers - initially
hinting to the braking system with a brief period of soft braking, then
firm braking applied in the middle phase, then tapering off during the
final phase avoiding any 'jerk'.
- The driver will aim to carry out all braking in a straight line to maintain
optimum stability, and will judge the braking phase to arrive at the hazard
at the desired speed.
- The planned braking phase and braking effort will be adjusted in response
to variations in road surface and grip, to avoid braking in unsuitable
places such as standing water or loose surfaces.
- The driver will understand the effect of weight transition as the load
shifts under braking.
- Ability to describe the effect of ABS and cadence braking. Emergency
Braking.
- Smoothness is not a priority in an emergency situation. Drivers will
be able to stop the vehicle in the shortest possible distance in an emergency,
without an uncontrolled skid. The driver would be expected to depress
the clutch to avoid stalling and stranding the car in a dangerous position.
- If the vehicle is fitted with
ABS or electronically assisted braking, the driver should be
aware of its effect.
Steering
Introduction
The choice of steering technique is a matter of personal preference; however
the HPC driver should be able to appreciate the advantages and disadvantages
of different methods, and be willing to show adaptability and flexibility
in the application of steering techniques. Regardless of the method used,
steering inputs should always be smoothly progressive and provide optimum
control of the car in all circumstances, with reserve to cater for unexpected
circumstances.
Competencies
- Understand the use of different steering techniques and how they may
be applied in appropriate circumstances
- Steering inputs are smooth and precise
Demonstration
- The driver shows adaptability in using the steering technique that is
most appropriate for the driving environment, the speed and individual
characteristics of the car; for example the ratio of the steering rack.
- There should be no sudden change of direction that may unsettle the
stability of the car or cause undue discomfort for passengers.
- The driver's inputs will be phased, the initial phase tapered, hinting
at the intended course, before progressively steering to the required
direction thus allowing the vehicle to prepare for the change in direction
and maintain optimum balance.