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Chickens, roosters and helicopters: Emissions, noise, flying cars and a fair transition

  • Callister & Associates


There has been some debate about the use of helicopters in Tāmaki Makaurau, with residents of Herne Bay and other areas of the region opposing landings and take-offs from private properties. But the issues are much wider than noise and invasion of privacy. Helicopters are an amazing piece of technology. They can rush people from remote rural locations directly to hospital, pluck injured trampers off hillsides, or lift distressed sailors from a churning sea. But, when powered by fossil fuels, they are a very high emission form of travel. Where do they fit in when considering emission reduction plans? Yet, there is now a promise of Advanced Air Mobility, with ‘zero emission’ flying cars and planes set to transform urban and regional mobility. Is this a future we really want? Is it a green growth scenario that will create a whole set of new problems?
Chickens, roosters and helicopters:
Emissions, noise, flying cars and a fair transition
Paul Callister & Sandra Callister
October, 2022
A research note
Chickens, roosters and helicopters
Paul Callister and Sandra Callister
I became interested in the debate about the use of helicopters in Tāmaki
Makaurau when reading about the residents of Herne Bay and other areas of
the region opposing landings and take-offs from private properties. There was
talk “of decks shaking, crying babies and flying deck chairs with early morning
noise breaking the peace for neighbouring properties” and the disturbance to
nesting birds. There were also some safety worries. There were concerns
expressed on offshore islands in the Hauraki Gulf as well. Now a new concern
has been raised in the media.
Auckland Council has been accused of holding different standards on
cutting climate emissions, asking people to reduce car use but not
helicopter use.
Council's Transport Emissions Reduction Plan (TERP) calls for
Aucklanders to cut car use in half, but does not address private aircraft.
But while a few noisy internal combustion engine helicopters coming and going
from a few private properties in Tāmaki Makaurau have attracted attention,
there are some futurists, some might say fantasists, who see the potential for
thousands of electric powered flying vehicles creating a new level of ‘low
emission’ mobility within Aotearoa New Zealand’s cities and regionally. This
would herald a new era of personal mobility, or as the enthusiasts describe
it,“advanced air mobility” (AAM)”. No longer would we need light rail to the
airport in Wellington or Auckland. Flying taxis would be used. And in fact, with
vertical take-off inter-regional planes as part of this green growth future, the
airport for regional flights might be in the centre of town. The currently
uneconomic Kāpiti airport would again be thriving. And autonomous flying
machines would be dropping off our pizza orders. For those old enough, this is
how the Jetsons lived.
There are clearly some new policy issues emerging as we try and dramatically
reduce emissions, while at the same time trying to make our cities better
places for all people to live in.
I thought it would be good first get a ground up perspective of my sister. Sandy
Callister is Tāmaki Makaurau based and more to the point, has a home on
Medlands Beach, Aotea Great Barrier Island, impacted by the current
helicopter debate.
An Auckland resident’s perspective: Sandra Callister
What do chickens, roosters and helicopters have in common when it comes to
the current Hauraki Gulf helicopter debate? One could say that loosely, they all
fall into the category of birds of the hovering type. And they all make noises
that are not always acceptable to neighbours. Weirdly, there are more
restrictions around chickens and roosters disturbing the neighbourhood peace,
than there are around helicopters disrupting the peace.
I have chickens in urban Auckland. We have a family home on Medlands beach.
Perhaps I’m not the only one that finds it a very upside-down world that I have
to comply with best practice chicken keeping. Urban properties of up to 2000
square metres can keep up to six chickens -but roosters aren’t allowed due to
noise concerns around crowing. Councillor Wayne Walker, at the time
Auckland’s Council’s Regulatory Committee Deputy Chair says “before you get
chickens, it’s a good idea to talk to your neighbours about it. If they have
concerns about noise, for example, you’ll have the chance to address them -
and it won’t hurt to offset their concerns by promising them occasional free
We follow the rules. We have five chickens and we do share eggs. But my
neighbours on Medlands do not have to be mindful of noise when it comes to
landing and taking off of helicopters. Nor are they encouraged to consult with
neighbours about what they think of the noise of helicopters. My family have
had a home on Aotea Great Barrier Island for some thirty years. We love the
island. I am a trustee on the AoteaOra Trust social enterprise board that seeks
to make our island community both more sustainable and resilient. I run the
artist-in-residence programme as this is a wonderful environment for creative
people to have the luxury of time and space. What a shock then to read in the
NZ Herald that a number of resource consent applications for helicopters had
been notified for the island. Four of the five are along Greensides Road, across
and up the hill from the creek at the eastern end of our beach. This is when
there is a perfectly good airport, 10 minutes driving time, in the next-door bay.
This is where the fixed wing commercial planes and the Westpac Rescue
helicopter come and go. Immediately I wrote to the chair of our local board,
Issy Fordham, and to the then Councillor Pippa Coom, Waitematā and Gulf
ward Auckland council expressing my wish to see this issue opened up for
wider community consultation. More private helicopters coming and going,
and more noise are at odds with our off-the-grid ethos, and the desire of so
many of us to live more sustainably. Both people responded sympathetically,
gave me an overview of the rules as they currently stand, and what has to
happen if the regulatory framework and controls for helicopters which sits
with the government/CAA are to be reformed.
Helicopters should be treated like roosters in neighbourhood settings. In my
view they are worse than roosters. If they have an equivalence, they are more
like the Targaryen dragons in the House of the Dragon.
A sustainable transport researcher’s perspective: Paul Callister
Our current helicopters are, of course, an amazing piece of technology. They
can rush people from remote rural locations directly to hospital, pluck injured
trampers off hillsides, or lift distressed sailors from a churning sea.
Increasingly, helicopters are likely to be used to rescue people affected by
climate induced flooding or fighting fires that are becoming more common in a
warming climate. They are also vital in conservation work in Aotearoa.
Recognising their value in these roles, I am a supporter of the Life Flight Trust.
But we know that helicopters are a very high emission way to travel. And we
are all being asked to reduce emissions by driving less, flying less, and walking,
cycling, and taking trains and buses more. There is also much concern about a
fair transition to a low emission transport sector.
An article entitled Natural Wonders to Appreciate Before They're Gone ,
without any trace of irony, stated:
Here today, possibly gone tomorrow. New Zealand’s marine glaciers
are noticeably changing their mass year to year and have been on the
decline for the past two decades. According to an article by The
Guardian, the Franz Josef glacier “has been retreating rapidly and lost a
massive 1.56km in length, at the fastest rate ever recorded.” Fox
Glacier is facing the same fate, and since 2019, its access road was
closed due to repeated flooding and a massive landslide and is now
only accessible by helicopter.
Helicopter based tourism, including heliskiing in the South Island, wine tours to
Waiheke Island, and Forest & Bird advertised trips that include helicopter
transfers, is one of the many reasons why New Zealand has lots of helicopters.
According to Civil Aviation Authority of New Zealand data, there were 889
registered civilian helicopters in New Zealand in 2019, up from 761 in 2010.
According to international data, the civilian fleet in the United States of
America in 2019 was 9,348. On a per capita basis, this means we have roughly
six times as many helicopters.
Helicopters use lots of fuel and as a result are heavy emitters of CO2 and other
greenhouse gases. Helicopters use much more fuel than fixed-wing airplanes
because their rotors are responsible for creating all the lift. A fixed-wing
aircraft uses the engine to propel the plane forward, with the wings generating
most of the lift. In addition, the rotating rotor blades of a helicopter will cause
a lot of drag when the helicopter cruises at hight speed.
In Aotearoa New Zealand, there are a variety of helicopters operated from the
small Robinsons to the larger turbine powered Bell or Hughes helicopters.
These turbine powered helicopters are safer but use more fuel. They are the
ones most likely to be used flying to private properties.
It is possible to get a rough estimate of emissions from Aotearoa’s total
helicopter fleet. It is estimated a Bell Jet Ranger will consume about 114 litres
of aviation fuel per hour. Robinsons less and some bigger turbine helicopters
much more. One litre of aviation fuel burnt produces about 2.3 kg of CO2. So a
helicopter, on average, might be producing about 260 kg of C02 per hour. New
Zealand Civil Aviation data shows civilian helicopters flew about 200,000 hours
in 2019 (pg24)
This suggests emissions were about 52 kilo tonnes. Total domestic aviation
CO2 emissions in 2019 were 1,016 kilo tonnes making helicopters responsible
for about 5% of total domestic aviation emissions.
Is this too small to worry about? The problem is so many activities are small.
But they all add up. We need to consider ways of reducing emissions from all
transport options
As already discussed, some of this is essential flying. But another part is for
personal travel and tourism. On a per person, per kilometre, basis, this is an
extremely high emission activity. In a fair transition, we cannot continue to
sanction such flying while asking the rest of the population to reduce their
emissions. In a Stuff article an example of helicopter use relative to car use was
A trip in an Airbus H130 helicopter to the Tara Iti golf course near
Mangawhai, for example, would take 20 minutes and expel around
113kgs of CO2. Driving there would take an hour and a half and produce
There would be some ways of discouraging such flying. For example, banning
tourist helicopters in national parks and in other conservation areas. And in
cities, having landing and take off zones being restricted to a few defined
heliports rather than private properties. Or having no fly zones for other than
essential services. Those wanting wine tours to Waiheke would instead travel
by low emission, hopefully soon to be electric, ferries to the island.
Helicopter manufacturers are aware of the need to decarbonise and offer up
the same set of solutions as for fixed wing aircraft, promoted as moving to
‘zero emissions’. But as we know for fixed wing planes, none of these solutions
are without major challenges. For example, it is possible that the biofuel used
to run them might be made primarily with food crops or palm oil and
contribute to our environmental problems rather than solve them.
Advanced air mobility
There are start ups all over the world promoting flying cars in various forms
and small electric planes for regional travel. In an interview in late 2021, the
CEO of Volocity set out his vision for AAM.
Volocopter is working on three types of eVTOL vehicles: the VoloCity, a
two-seater urban air taxi; the VoloConnect, for traveling between cities
and suburbs; and the VoloDrone, for transporting cargo. VoloIQ, the
company’s digital platform, is designed to connect all of these services
and allow consumers to book flights easily. Volocopter is one of several
eVTOL companies that have recently gotten considerable traction in the
investor community; the company has raised more than $350 million in
equity and has formed partnerships to bring its services to a number of
cities, including Los Angeles and Paris.
If one thinks this is only the vision of fantasists, look at the just released
Victoria state government AAM strategy document. In a ministerial forward it
is stated:
Globally, the Advanced Air Mobility (AAM) sector is moving fast, with
several companies seeking to enter the market from 2024-25. This fast-
approaching horizon further emphasises the necessity for governments
to develop the foundational structures, systems and market frameworks
required for AAM.
The use of AAM in Victoria has the potential to revolutionise logistics,
service delivery, emergency services, regional connectivity and
passenger transport providing opportunities for improvements in
safety, time, cost and noise. As a zero-emission transport mode, AAM
will also support the decarbonisation of our society.
In its Innovation for a Green Transition 2022 Environmental Report , the United
Nation’s International Civil Aviation Organization (ICAO) has a chapter on flying
Archer Aviation, based in Palo Alto, California, USA, is working to build
an electric vertical takeoff and landing (eVTOL) aircraft and aerial
ridesharing service, that will move people throughout congested cities in
a quick, safe, sustainable, and cost-effective manner. Through their work
both on their eVTOL aircraft, and with partner cities such as Los Angeles
and Miami, they are laying the groundwork to curb the growth of urban
congestion, and the resulting historic levels of emissions in populous
Closer to home, Tātaki Auckland Unlimited is working with Wisk Aero, creator of
autonomous air taxis, to help bring them to Auckland one day.
There are also regular media stories about larger electric planes, including
those that can take off vertically.
Such visions gloss over many challenges. Many of these electric flying machines
turn out to be harder to produce than initially advertised, with often major
range issues.
Another is the huge amount of renewable electricity required to keep these
machines in the air. The laws of physics still apply to these descendants of
helicopters. It will not be ‘zero emissions’. Scarce renewable electricity would
be better used to heat houses, power our buses and electrify our whole rail
There are also serious concerns as to whether there are enough minerals and
other materials available for these vehicles along with all the other batteries
required for decarbonisation of our economies.
But even more importantly, even if possible, is this a future we really want?
While probably quieter than helicopters, having our skies increasingly filled
with flying machines would create other problems, including safety. And would
this be only an option for the well off, while most of us wait in a queue for the
Keeping chickens in many cities and towns is highly regulated. We now need to
carefully consider how we manage, helicopters, and the flying machines that
may eventually replace them. The ground rules and the rules about what
happens in the airspace above are vastly different leading to hugely different
outcomes for neighbourhoods, for emissions and for a just transition to a low
emission society.
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ResearchGate has not been able to resolve any references for this publication.