Australian Technology Pty Ltd A.C.N. 008 126 350...Author: W.D.R. Potts CPEng Engineering Supplement...
Transcript of Australian Technology Pty Ltd A.C.N. 008 126 350...Author: W.D.R. Potts CPEng Engineering Supplement...
Australian Technology Pty Ltd A.C.N. 008 126 350
Consulting Engineers Telephone: (08) 8271 4573
1 Bendall Avenue Reference: S\36\04151A
Wayville Design for pedestrian impact
South Australia 5034 © Date: 20/01/2016
Author: W.D.R. Potts CPEng
Engineering Supplement 50
Review of the political, quasi political and quasi legislative environment of vehicle modification.
There are many approaches that can be taken to the issue of road safety. The one that is being adopted currently in
South Australia is a "system of systems" approach. Alternative approaches such as risk management or all of life
risk balance are available as models but the system of systems approach is the one being adopted at the level of
legislative and executive government in South Australia in 2015.
This approach has its cognitive base in Sweden and the Netherlands and is goes under the slogan "towards zero".
By this is meant a system to bring about zero road accident related deaths per year -- a reduction from say 5 to zero
deaths per 100,000 population per year. The feasiblity, probability of success, and reality of such a program are not
negotiable. The towards zero strategy targets:
1) the design of and access to roads,
2) setting of speed limits and control of speeds,
3) design of vehicles to absorb the energy of crashes and protect occupants
4) training, assessment and cultural milieu of drivers and control of access to licences.
The management of these targets relies upon perfect knowledge existing for road design, speed limit setting,
vehicle design and skill assessment and towards those parameters standards and assessment guides exist in all
facets of the targets.
For the vehicle modification process to continue to have the support of members of parliament and the executive
arm of government, it is necessary to be able to demonstrate that each modification results in improvement in all
aspects of safety. The formal definition of safety has been expanded to include primary safety relating to driver
control and vehicle response, secondary safety of occupant protection in a crash, envirnonmental safety with
respect to noise and emissions and safety from theft.
The architects of "Towards Zero" accept that crashes are inevitable but aim to contain the forces of human body
impact to within survivable limits.
There is a pervasive belief among some that only vehicles with the latest and future electronic control devices and
approaches to design can be compatible with Towards Zero vision and that a revised culture of vehicle ownership
needs to be indoctrinated within the community.
This author disputes implications that older vehicles cannot be made compatible with the Towards Zero ambition.
At the same time the author considers Towards Zero to be a fiction but recogises it as a political imposition. This
annexure records the process of the arrival at recommendations.
Australian Technology Pty Ltd A.C.N. 008 126 350
Consulting Engineers Telephone: (08) 8271 4573
1 Bendall Avenue Reference: S\36\04151A
Wayville
South Australia 5034 © Date: 20/01/2016
Author: W.D.R. Potts CPEng
Annexure 2
2011
2012
2013
2014
2015
Please note: Every design engineer seeks to reduce risk. The
issue is "how?" In 2012, Dr Robert Anderson of the South
Australian Centre for Automotive Safety Research wrote,
"the general lack of under-representation of specific safety
features in the crashed vehicle sample is intriguing, as the
results do tend to suggest that many vehicle safety systems
have not been associated with wholesale changes to the rate
of serious injury crashes (broadly defined)."
Post 2010 added by WDRP
Australian Technology Pty Ltd A.C.N. 008 126 350
Consulting Engineers Telephone: (08) 8271 4573
1 Bendall Avenue Reference: S\36\04151A
Wayville
South Australia 5034 © Date: 20/01/2016
Author: W.D.R. Potts CPEng
Annexure 3
Please note: The fatality rate has risen since 2012. (WDRP)
Australian Technology Pty Ltd A.C.N. 008 126 350
Consulting Engineers Telephone: (08) 8271 4573
1 Bendall Avenue Reference: S\36\04151A
Wayville
South Australia 5034 © Date: 20/01/2016
Author: W.D.R. Potts CPEng
Annexure 4
Australian Technology Pty Ltd A.C.N. 008 126 350
Consulting Engineers Telephone: (08) 8271 4573
1 Bendall Avenue Reference: S\36\04151A
Wayville
South Australia 5034 © Date: 20/01/2016
Author: W.D.R. Potts CPEng
Abreviated injury scale AIS 3: 8-10% risk of death
Annexure 5
Please note: 50% of
pedestrians striking a
bonnetted vehicle at 40 km/h
are likely to die.
Australian Technology Pty Ltd A.C.N. 008 126 350
Consulting Engineers Telephone: (08) 8271 4573
1 Bendall Avenue Reference: S\36\04151A
Wayville
South Australia 5034 © Date: 20/01/2016
Author: W.D.R. Potts CPEng
Annexure 6
Australian Technology Pty Ltd A.C.N. 008 126 350
Consulting Engineers Telephone: (08) 8271 4573
1 Bendall Avenue Reference: S\36\04151A
Wayville
South Australia 5034 © Date: 20/01/2016
Author: W.D.R. Potts CPEng
Annexure 7
Australian Technology Pty Ltd A.C.N. 008 126 350
Consulting Engineers Telephone: (08) 8271 4573
1 Bendall Avenue Reference: S\36\04151A
Wayville
South Australia 5034 © Date: 20/01/2016
Author: W.D.R. Potts CPEng
Annexure 8
Australian Technology Pty Ltd A.C.N. 008 126 350
Consulting Engineers Telephone: (08) 8271 4573
1 Bendall Avenue Reference: S\36\04151A
Wayville
South Australia 5034 © Date: 20/01/2016
Author: W.D.R. Potts CPEng
Annexure 9
Wrap around distance 2105 mm Conclusion: Without the external
gauges, the vehicle is
unambigously safer in every
respect than it was in 1974 at first
manufacture. Although the risk of
the hobby vehicle producing actual
pedestrian harm is extremely low,
it is the author's recommendation
that the principles of Towards Zero
be adopted and the gauges
removed. By so doing, the
modified vehicle can be
championed as being consistent
with Towards Zero.
Conclusion: Without the gauges, the bonnet and cowl panel offer no protrusion. The wrap around distance is
measured from the ground to the POINT of head impact. Although the instrument are ahead of the wrap around
distance, they still cause head impact and in relative motion between head and impact point would magnify injury.
Australian Technology Pty Ltd A.C.N. 008 126 350
Consulting Engineers Telephone: (08) 8271 4573
1 Bendall Avenue Reference: S\36\04151A
Wayville
South Australia 5034 © Date: 20/01/2016
Author: W.D.R. Potts CPEng
Annexure 10
Australian Technology Pty Ltd A.C.N. 008 126 350
Consulting Engineers Telephone: (08) 8271 4573
1 Bendall Avenue Reference: S\36\04151A
Wayville
South Australia 5034 A remedy the preserves the head up © Date: 20/01/2016
view of the gauges Author: W.D.R. Potts CPEng
Annexure 11
The concept of "heads up" instrument placing is valid and enables drivers to less often divert attention from the
road ahead. The zone in front of the steering wheel is not considered as being within the head impact area.. In the
author's opinion the gauges should be moved inboard of the windscreen.
Conclusion: The steering wheel protects the gauges that are in the heads up region when they are relocated to
the inside of the cabin.
Australian Technology Pty Ltd A.C.N. 008 126 350
Consulting Engineers Telephone: (08) 8271 4573
1 Bendall Avenue Reference: S\36\04151A
Wayville
South Australia 5034 © Date: 20/01/2016
Author: W.D.R. Potts CPEng
Annexure 12
In order to retain the exterior
gauge nascelles, it is possible to
fit a reverse bonnet scoop that
protects a pedestrian from head
contact with irregular shaped
protrusions. In this arrangement
the aggregated deformation of the
scoop, the nascelle, the bonnet
and the cowl panel give the
pedestrian greater than original
protection.