Category: Travel

H2 Aircraft Design

Cards on the table. I’m a believer. Despite the immense technical challenges, Hydrogen is a viable fuel for future large civil aircraft. That said, operational service of such revolutionary aircraft isn’t going to happen in a hurry.

Reading the history, Concorde was an incredible test of the boundaries of what was possible and that was met, but it didn’t come easy. Breaking new ground is never easy. [A common saying that’s maybe open to challenge]. In aviation making step-changes happens every decade. What’s nearly always required is exceptional determination, almost beyond reason, large sums of money and special people.

Control systems – no big deal. Mechanical components – evolution possible. Turning a gaseous fuel into high-levels of propulsive thrust – can be done. Building a one-off technology proving research vehicle. It’s happening. At least for the light and commuter class of aircraft.

None of this is enough. Because the gap between an aircraft that can fly and an aircraft that can be produced in the thousands and go on to make an operational living and build an impressive safety and reliability reputation, that’s still a million miles off.

Today, there’s artist impressions of all sorts of different H2 aircraft configurations. It’s like people painted pictures of Mars with imaginary canals, long before anyone knew what the planet looked like in reality. Innovation starts with ideas and not all of them are sound.

As I expressed in my last article, crashworthiness must be given much consideration when speculating about future designs. It’s not always explicit in aircraft certification, cabin safety being the exception, but studying the history of accidents and incidents is essential. One of the successes of the authorities and industry working together is to take lessons learned seriously.

I remember looking at the pictures of the wreckage of Air France Flight 358, which crashed on landing in Toronto, Canada[1]. The fact that there were no fatalities from that accident is a testament to good operations and good design practices. The Airbus aircraft burned out but there was enough time for passengers and crew to get away.

My thought is what kind of H2 aircraft configurations would permit the same opportunity?

Considering this large aircraft accident, and others like it, then there’s a message as to where fuel tanks might best be placed. There’re some aircraft configurations that would have little hope of providing the opportunity for rapid evacuation of hundreds of people.

So, in my mind, don’t attached large pressurised cryogenic fuel tanks to the underbody structure of an aircraft fuselage. However robust the design and build of such fuel tanks they would be unlikely to survive as well as the cabin passenger seats, namely 9g[2]. That would not provide a good outcome post-accident.

Maybe, like aircraft engines sitting on pylons off the wings, that too is a good place for fuel tanks.

[1] https://asn.flightsafety.org/asndb/322361

[2] https://www.easa.europa.eu/sites/default/files/dfu/NPA%202013-20.pdf

Challenges of Hydrogen Fuel in Civil Aviation

This week has been a Hydrogen week. It’s great to learn more of the projects that are out there and the ambitions of those developing systems. Hydrogen is a live subject. Looking at the possible pathways for civil aviation to take there’s a myriad of choices. However, when it comes to the fuel for propulsion there are not so many potentials.

It’s surely the case that at some time in the future the use of fossil fuels to propel us across the skies will no longer be acceptable. Even if I’m talking to climate change sceptics the point must be made that fossil fuels are a limited resource. Not only that but the air quality around airports is a matter of concern.

It’s there in our basic education. Water is H2O. It’s that combination of Hydrogen and Oxygen that is essential to life on Earth. So, if we have a process that provides aircraft propulsion by using Hydrogen it should be a whole lot better for the environment than using Jet A1.

The problem is, and there’s always a problem, to carry enough Hydrogen it will need to be pressurised and in liquid form. That means extremely low temperatures, robust storage containers and extensive leak free plumbing.

Today, we have cars on the road that run on liquefied petroleum gas (LPG). It’s a novelty. It’s less harmful to the environment and can cost less. However, LPG systems need regular servicing. The point of mentioning this pressured gas in a transport system is that it has been integrated into regular everyday usage. That’s knowing that escape of even small quantities of the liquefied gas can give rise to large volumes of gas / air mixture and thus a considerable hazard[1].

Any analogy between the car and the aircraft can be forgotten. That said, one or two of the issues are similar. Yes, what happens when an escaped volume of gas / air mixture is ignited?

What scenarios would bring about conditions whereby a destructive explosion is possible?

Let’s start with the situations where aircraft accidents most often occur. Take-off and landing are those phases of flight. A surprising number of accident scenarios are survivable. The important part being to get an aircraft in trouble on the ground in such a way that an evacuation is possible. That can mean hitting the ground with a great deal of force[2].

Here’s the matter of concern. An aircraft with large cryogenic tanks and associated complex plumbing hits the ground at a force of many “g”. What then happens? Certainly, pressurised liquefied gas would escape. Being a very light gas, the uncontained Hydrogen would rise rapidly. However, trapped amounts of gas / air mixture would remain a hazard. Would that be ignited?

There are a lot of unknowns in my questions. Although there are unknowns, any post impact situation is likely to be very different from a situation with a conventionally fuelled aircraft.

Today’s, burn through requirements ensure that an external fuel fire is held back. Thereby ensuring enough time to evacuate. For a hydrogen aircraft ventilation may be essential to stop build-up of a gas / air mixture inside a fuselage. That means a whole different approach.

[1] https://youtu.be/AG4JwbK3-q0

[2] https://skybrary.aero/accidents-and-incidents/b772-london-heathrow-uk-2008

New Form of Monarchy in 2024?

An observation. There’s something strange going on across the Atlantic. You see, I have found inspiration in the story of America’s revolutionary struggle. The writings of Thomas Paine stirring up a radical movement. The strong desire to be independent of the rule of Kings and Queens. There’s a lot to be said for freeing a nation from imperial tyranny.

The Declaration of Independence in 1776 is a bold statement. Rejecting the royal authority of George III to set a new nation on an independent path. It proved to be a dynamic and prosperous democratic path. One that people across the world looked on with admiration.

It’s true that the United States has had its own dynasties. Powerful families and influential individuals that have shaped its history. However, since its independence, none of them have ruled as a monarch. None have wheeled massive power without checks and balances.

Yet here we are in 2024, and a form of pseudo monarch stands ready to take the reigns of power. Sure, democracy has played its part in putting one man in control. That, in of itself, is not unknown in the history books. The question to ask is when does a Republic tip over and become something quite different from what it has been?

I hope my observations are an exaggeration. It’s all to easy to see the News that commentators want us to see. I’ve often found that it’s most difficult to see things as they actual are as opposed to how they are shaped by personal beliefs and fleeting desires. Objectivity isn’t so easy.

This much can be said, the next four years are going to be turbulent ones. There’s a certainty in that conclusion. Even with the Atlantic in the way, just as the Jetstream brings us changeable weather, so unsettling waves of transformation will hit our shores.

The latest commentary coming from supporters of the new Trump regium in the US is one of polarisation. It’s the traditional stick-up. Choose between us and them. Our populous island off the shore of continental Europe must be squeezed into a choice between the US and the EU.

This monosyllabic way of framing a debate gets swallowed by the media. Overall, it’s nonsense. There’s no way that both will not be important for as far over the horizon as anyone can see. Both are going through periods of disruption. For once, domestically, the UK seems relatively stable. That’s putting aside the past damage done by Brexit and a Conservative government that fell into total disrepair. Yes, the UK can plot its path knowing that some internal consistency can be expected.

Everything I’ve written here is overshadowed by issues of global concern. Overshadowed being the sad reality. Climate change will not wait for the dust to settle from ardent disruptors. The planet’s atmosphere knows nothing of the exploits of prominent personalities. We desperately need to rediscover common interests and act on common concerns.

Exploring the Kennet & Avon Canal

It’s the road to the west. The A4 out of London heads towards the west. It’s younger but bigger brother the M4 motorway goes the same way. Going the same way too is the Great Western railway and before that a major waterway, a canal. I guess the ancient roads predate the lot of them given that east-west traffic is an important part of English history. Certainly, the Romans went that way.

I now live at what is roughly the halfway point between London and the west. It’s where what is largely a level route from London starts to rise at a slow pace. That climb made linking rivers, most particularly the London Thames and the river Avon in the west, a challenge. The incentives were evident. So, much potential for trade. Moving heavy commodities around. Canals are truly visionary engineering infrastructure and now an inheritance that’s much treasured.

For people who like to walk, like me, canal towpaths[1] provide flat route between towns. A direct waterside route that wanders through lush countryside. Yesterday, I did the 15km between Newbury and Hungerford. Along that stretch, the Kennet & Avon Canal raises about 150 feet but it’s almost unnoticeable. The main signs are the difference between the fast-flowing waters of the river Kennet and the sober slow canal. A littering of canal locks and small brick-built bridges are a feature too.

The Kennet & Avon Canal was constructed between 1795 and 1810. It was eventually killed-off as a commercial enterprise by the construction of the Great Western railway. Being cheaper and faster along the iron road, transport of goods by water couldn’t compete. It’s in this modern time that the canal was restored. It’s been working again for the last 30 years. Now, it’s a centre of leisure pursuits, small businesses and alternative lifestyles.

The canal’s path follows the River Kennet and its narrowing flood plain. I found looking at how the waterflow is controlled by sluice gates and weirs a fascinating part of the walk. Ambling along the canal’s towpath is a great way to venture into the Berkshire countryside. There are a couple of points where the path changes sides and it’s a bit soggy in one or two places but overall, it’s relatively easy walking.

I did see an Otter on the opposite bank. It was a fleeting glimpse. He, or she, slinked away almost before I realised what I was looking at. Quite different from noisy ducks this Otter made virtually no sound or ripples on the water. 

Dotted along the canal near bridges, decaying concrete World War II-era pillboxes are a reminder that this would have been a defensive line if Britain had ever been invaded.

The walk took me under 4 hours. I was exceedingly fortunate with the weather on the day. A cool breeze and intermittent sunshine. Not bad for November.

[1] https://canalrivertrust.org.uk/things-to-do/walking

Travelling Post-Brexit

Ever since Brexit, I’ve had to have my passport stamped in and out of European countries. It’s like a reversion to the days when I got my first British passport. That was back in the late 70s.  It has a frighteningly youthful picture. Occupation – student.

I’m not so phased by the coming changes to European Union (EU) border controls. Naturally, it’s worth asking if Britian has become a more dangerous nation since the time before Brexit when we enjoyed freedom of movement. It’s a pity we didn’t value that freedom a lot more. It was thrown away far too easily.

Today, the electronic border controls expect us to stare at a camera. A securely held, I hope, database is used to check a list of biometric numbers against my image. I guess that’s a sure-fire way of saying that Mr Blogs is indeed someone who looks very much like Mr Blogs. Facial recognition technology has come a long way.

The next steps in tightening-up controls will be fingerprinting[1]. Not in the manner of Sherlock Holmes, with an ink pad. No, in the digital age an ominous machine will scan our fingers and check its records to see that not only does Mr Blogs look as he should but that he’s got the essential characteristics of Mr Blogs.

Certainly, in this new regime British citizens will not be able to overstay in European countries. Ones travel records will be a lot more quantifiable and precise than stamping a piece of paper. That is assuming such digital border control machines will be relatively error free.

One of the benefits of Brexit is that it will be easier to track the movements of British criminals in and out of the EU. The reciprocal will not be true. It will not be easier for British authorities to track continental European criminals in an out of the UK.

Ah the luxury of being a Third Country. Longer ques. More uncertainty. Less privileges.

What’s more is the introduction of the new EU border control systems will be “phased[2]”. This change will not be one big bang. So, different ports and airports will be doing different things at different times. Now, it doesn’t take a genius to see that confusion is most likely.

Travelling in 2025 is going to be more than the usual adventure.

[1] https://commonslibrary.parliament.uk/the-eu-entry-exit-system-and-eu-travel-authorisation-system/

[2] https://www.independent.co.uk/travel/news-and-advice/eu-biometric-border-fingerprint-entry-delay-b2627645.html

Navigating Heights

If I were to explain, the reasoning would go like this. It’s good to have a vivid imagination. As an engineer, it’s essential to be able to create a mental picture of what’s happening. But there’s a downside. Looking at a situation and seeing more than is there, opens the door to imagining all sorts of scenarios that are unlikely.

I’m talking about that experience of peering over a cliff edge to see what’s there. Curiosity being a strong urge. Then pulling back in fright of falling. Often when the ground is solid and safe. Often when nothing more than a spark in the imagination creates an unreasonable fear of falling. The fleeting image I have in mind is looking down at Beachy Head Lighthouse[1].

I have a curious relationship with hights. No, I’m not terrified of heights. It’s just that now and then that fear of falling does kick in. This feeling could be embedded or learnt from an early age. My mother tells a story of me as a toddler being halfway up a ladder. Sacring her. Me being oblivious to any danger and coming to no harm. Growing up on a family farm there was innumerable hazards around every corner.

One of the riskier things was to climb up the haybarn roof. This was an open steel framed structure spanning several bays. Corrugated sheets made up its roof. In the UK, we call these buildings a Dutch barn. This mostly refers to the curved shape of the roof. From the top of the barn, it was possible to see the whole farmyard.

Last week, I hiked around the Caldera de Taburiente on La Palma. I learnt that the term caldera has Spanish origins. So, I was in the right place to assess any fear of hights that might linger in my psyche. The Caldera de Taburiente is more than 2000 m deep.

Even the roughly hewn paths, some restored from local landslides, didn’t phase me. It’s as if, because I was one of thousands who have passed the same way, the dangers where contained. In fact, there were not. Some of the well-worn slippery stones underfoot had to be approached with a great deal of caution. Loose rocks and sheer drops had to be navigated with care.

The Caldera de Taburiente National Park is a magical place. It has a Jurassic Park feel about the place. Given that it’s not much more than a few million years old the place is far to youthful for dinosaurs. It has its own special natural beauty.

My aging but persisting vivid imagination had plenty to occupy itself as we climbed and descended in and out of the park. The whole hike was about 16 km. This was the second time I’d taken this circular route. What surprised me was the hard parts of the climb and decent following a riverbed on the way out. That part I’d conveniently forgotten.

No, I’m not terrified of heights when there’s solid ground underfoot. They do however have the capacity to scare or at least summon up a lot of extra care. I hope that inbuild sense of self-preservation never fails me.

[1] https://www.beachyheadlighthouse.co.uk/

I’m Mandy

It’s something to ague about. My view is that pop songs don’t have to have “official” meanings. If you listen to a song and it means something to you then there’s no point in arguing with someone else about what it means. Well, not much point other than the pure fun of it.

That doesn’t stop an argument. It’s like answers to quiz questions. There’s that strong desire to be the one with the right answer. With a song it’s not so easy to be literally right or wrong. There may be clues left by the song writers or a generally excepted interpretation. It’s not a subject to place major bets on. There’s likely to be no definitive answer.

This week, I popped into a small shop that is full of retro bric-a-brac. In one corner there’s a display of second-hand vinyl records. 45s and LPs nicely arranged in alphabetic order. I find it fascinating what’s fashionable, and thus pricy, and what’s not. This trendy little shop aims at a student market. What caught my eye is an album from the band 10cc[1] from 1976. It has a colourful fold-out album cover which is a story in of itself. It’s a real photographic artwork. And strangely profound in the age of the mobile phone. Lots of people holding telephone handsets.

“How Dare You![2]” is an immensely creative but almost incoherent jumble of wandering songs. It’s a kind of progressive rock music exposé but much more popular, in the sense of pop. And in its time, it did well for the band, giving them two charting singles from the album. It’s a 70s vinyl masterpiece that will not be entirely lost and forgotten.

10cc is part of my student history. From what I could see from the price, it’s not so fashionable with today’s students. In good condition, for £5, I was more than happy to spend my hard-earned cash. At the till, the young lad who was minding the shop took one look at the album cover and asked: do you mind if I take a photo of that? We both agreed that streaming music is fine but there’s something more satisfying about handing physical artwork like this album cover. It’s tangible. It’s real. It’s an artifact.

The most notable song on the album is “I’m Mandy, fly me”. What is known about 10cc and their song “I’m Mandy, fly me” is that it was kicked off by a National Airlines poster. Like so many American airlines, National got swallowed-up and those who swallowed them up suffered the same fate. But in the 70s they were going strong. What they will be remembered for is that one of their publicity stunts caused controversy. It’s the sort of situation that kicked-off protests and rightly so.

In the early 70s, to sell their long-haul seats National’s posters ran a slogan saying: “I’m (flight attendant’s name). Fly me.”. The sexist nature of the advertising slogan got heavily criticised. These airline posters must have been up in Manchester, UK. Enough for seeing them to inspire 10cc to write the song “I’m Mandy, fly me”[3].

What’s it about? I think it’s pure imagination. Wandering a street, seeing the poster and going off on a fanciful muse. In my view it’s not literal. There is no plane crash. The fantasy is that the flight attendant in the poster rescues the singer from the dullness of everyday Manchester. After a few moments he snaps out of it, realises that he’s been daydreaming, and life carries on.

[1] https://www.10cc.world/

[2] https://en.wikipedia.org/wiki/How_Dare_You!_(album)

[3] https://genius.com/10cc-im-mandy-fly-me-lyrics

Illusion of Sovereignty

Desperate for something to say because their arguments have been shot down in flames, those who continue to support Brexit raise the subject of sovereignty. It’s as big a red herring as you are likely to find. That said, the notion of complete autonomy does have a resonance with one part of the political class.

One example of reality being different from political rhetoric is one I regularly see. I’m driving more than I have done in a while. Mostly, on the M4, M3 and M25 motorways. In this country some freight goes by rail, but the overwhelming amount of freight goes by road.

A sign of our times has been the construction of massive warehouses close to motorway junctions. Strategic non-motorway routes too. I do mean massive steel sheds. Counting the number of football fields covered by these structures doesn’t help. I’ll bet some of them can been seen from space.

Back to the British roads. 6-wheelers, 8-wheelers, 12-wheelers, big heavy trucks often showing the wear and tear from journeying great distances depend on the motorway system. A constant flow of heavy goods moves day and night.

Looking at the trucks, some have UK registration plates, some have UK registration plates thrown over their original plates. Most drive under the registration plates of a country of origin or wherever their commercial operations are based. Each plate tells a story. LT is Lithuania. PL is Poland. H is Hungary. NL is Netherlands. D is Germany.

So, every day we have tens of thousands of trucks maintained and operated to standards set by the European Union (EU) on our roads. They are left-hand-drive. Their speedometers are in kilometres per hour.

It occurs to me – what does “sovereignty” mean when everyday looks like a day driving?

For sure, no British inspector checks the condition of each one of these trucks on a regular basis. For sure, truck driver’s hours are only occasionally checked. For sure, maintenance records are locked away in a filing cabinet.

In the world of absolute sovereignty none of this should be allowed. In fact, much of the above-described transport operations are continuing as they did before Brexit but with extra paperwork attached. Extra costs.

It’s an observation. It’s easily made when stuck between a couple of heavy goods vehicles on the motorway. Pragmatism may have led to a blind eye being turned to reality. We shouldn’t delude ourselves that Brexit has delivered anything useful in this respect.

Why the UK Should Rejoin

Fine, I’m happy to admit that my march, with thousands of others, through the streets of London on Saturday was not everyone’s cup of tea. There are a lot of people who support the idea of a return to European Union (EU) membership but are reluctant to raise the issue just now.

Often cited is the wave of right-wing politicians who are gaining ground in Europe’s larger countries. It’s as if they are going through their own Brexit like political moment but without anyone of any consequence advocating throwing away their EU membership.

Maybe the UK is ahead in this respect. We’ve been through the confusion and turbulence of the political right-wing eccentrics moment in the sun. They were never mainstream. However, they did hold the reins of power for some disastrous years. Thank God they are now behind us.

I have marched year-after-year because it’s the right thing to do. Tens of thousands from all over the UK have done the same as me. Millions if the numbers added-up from 2016 onward. Our future can be based on cooperation and mutual interests. Ideologically driven conflict and disruption have brought nothing but a lose – lose outcome.

So, what are the arguments for the rejoin movement? It’s all very well to shout at the thing we don’t like. Now, is the time to make the sound solid arguments for the thing we favour.

Let’s take trade for a start. The last UK Government wallowed in gushes of self-praise every time they signed an agreement with any country that was not European. Conservative Members of Parliament wanted to tower over the world like imperial overseers. It was an illusion.

Most of the so called “new” deals that were signed were simply a rollover that meant no change. In fact, more was given away than was gained. All in a desperate attempt to show progress. British farming was effectively shafted by Ministers.

One of the most touted possible “streets paved with gold[1]” was the prospect of a super new trade deal with the United States (US). Under President Trump, the prospect of an advantageous UK-US trade deal was an illusion.

Ironically, a claimed success was the joining of a regional trade block. I know it’s crazy that leaving a gigantic trade block on the UK’s doorstep was followed by joining one covering the Pacific. Yes, the other side of the world. Not only that but the projected gains are minuscule.

EU membership offers, as it did before, access to enormous trade benefits by comparison with what has been achieved since 2016. The numbers speak for themselves.

If the new Labour Government continues with a form of the fibs told during the “Get Brexit Done” phase, then trouble lies ahead. Next door, the UK has the world’s largest trading block. The value to the British economy of Single Market membership exceeds a mishmash of remote and small deals. There’s a positive way forward and it’s staring us in the face.

POST: It’s worth noting that the 1960 European Free Trade Association (EFTA ) was created, to promote free trade and economic integration included: Austria, Denmark, Norway, Portugal, Sweden, Switzerland and the United Kingdom.

[1] https://dictionary.cambridge.org/dictionary/english/streets-are-paved-with-gold

National Rejoin March: Unity for a European Future

The European Movement[1] has been around for 75-years. Yesterday, I was surrounded by a good number of their membership. That, and many Liberal Democrats. People, young and old, from communities up and down Britain. There were lots of people from the creative industries, so badly hit by Brexit. In fact, there were people of every political background marching through the streets of central London.

Everybody had gathered in central London with the aim of reversing the tragedy that is Brexit. I say “is” and not “was” because the disaster continues to have marked repercussions on everyday life. Reclaiming the freedoms that we once had has brought people together in large numbers.

On Saturday, pro-European campaigners made their way from Park Lane to Parliament Square for the third annual National Rejoin March (NRM)[2]. The weather smiled on the gathering. It couldn’t have been better in the light of torrential rain and the endless storms of past days. The sunshine and blue skies warmed my sprit.

The occasional chant of “Boll*cks to Brexit” has been replaced by Reset, Repair, Rejoin. As is the tradition of these events, posters ranged from the more obvious slogans, like #BinBrexit to the imaginative and sometimes bizarre. The group dressed in eye catching elephant costumes had a point to make. The elephant in the room being the protesters theme.

Standing next to me, one young lad asked his mate why he had decided to be on this rejoin march. I thought his response most was appt: “Because I want to be on the right side of history”. To me that just about sums it up. Brexit is an aberration. Eventually, after a great deal of to-and-fro the strong likelihood is that the UK will rejoin the European Union (EU), or its successor. Everything we know points in that direction. It may take a decade. It may take more.

The Labour Party won the 4th July UK General Election, and while it pledged not to reopen the main parts of Britain’s deal to leave the EU, does claim to want a significant reset. So far, the indications are that this policy line is typical political rhetoric, and little more. But it must be said that this is the early days of a new British government. If their claim to want growth in the economy to fuel spending on public services is honest, they would be mighty foolish to discount rejoining the European Single Market.

Thousands gathered in London. This will go on year after year. The diminishing number of objectors, who chant from the sidelines, remind me of the “Dead Parrot Sketch”[3]. For all intents and purposes all the arguments for Brexit have perished, much like the poor parrot. Even when that’s an obvious fact there are still those few people who will defend it to the hilt. As we walked down St James’s Street a well dressed bloke in a side street seemed most agitated. Shouted abuses and ran off. I looked around. We all shrugged our shoulders. I certainly thought – what a sad man.

I’m sure Britain can reclaim its place in Europe. It will take resolve and continuous effort but, as has been pointed out, this campaign is on the right side of history.

[1] www.europeanmovement.co.uk

[2] https://uk.news.yahoo.com/protesters-call-uk-rejoin-european-154046221.html?

[3] https://youtu.be/vZw35VUBdzo