Category: Systems

From Daedalus to Artemis

Being in good company is always nice. That spirit of experimentation doesn’t suite everyone. Now, I find myself in company of a NASA astronaut and an 12th Century English Monk. All in one week.

I stumbled across the NASA App[1] last evening. I hadn’t reckoned at that being available on my smart Sony TV. There it was. So, it only seemed right to download it and check up on what’s going on with the current Artemis mission. Other News told of delays and troubles with the launch vehicle that’s to send astronauts to circle the Moon. Setbacks are common in space flight so that’s not an issue to be alarmed about.

[Whatever would we do without the Ancient Greeks. Artemis, Apollo, Mercury, Gemini[2]].

This is a fundamentally important space mission given that it’s the first-time humans will have ventured so far since the days of the Apollo missions. Sending four astronauts around Earth’s satellite is a hard task to undertake. It’s aimed at establishing a means to get to the Moon on a regular basis.

Apollo spacecraft did this journey when computers were relatively primitive machines. Artemis has the advantage of a technical capability that is many fold greater. The problem is that sheer complexity and society’s tolerance for safety risk has moved on since the 1960s.

Anyway, the tale told, in interview of one of the Artemis astronauts is one of jumping off a barn roof as a young lad. Constructing a homemade parachute and trying it out. Having that freedom of a life growing-up on a farm and that appetite for experimentation. I was thinking, been there, done that and lived to tell the tale. In my previous scribblings I’ve mentioned the large red Dutch hay barn that was part of my youth.

Back to the Greeks. It’s myth but there may have been an element of truth in it. A map of modern Greece makes it clear that the islands of Ikaria and Crete are separated by a great distance. So, suggesting that a father and son in ancient time flew from one to the other can’t be true. However, that doesn’t dismiss the possibility that the Greeks experimented with the possibility of human flight.

So, the myth goes, Daedalus was the design authority for a method of flying which does not come recommended. Strapping on wings made of wax and feathers is a 100% risky venture. Daedalus was, if a real person, an imaginative ancient inventor. An inspiration to others. In this century it’s best to interpret the famous myth of flight as one of experimentation in a way that is fully respectful of the risks involved.

Coincidentally, this week, more by accident than intention. It’s a long story. I visited the town of Malmsbury. Inspired by the story of Daedalus, Monk Eilmer of Malmesbury[3] has solid claim to be the first European to fly. It wasn’t an entirely successful flight, but it was a flight. In the 12th Century he leapt from a church tower with wings of his own invention and survived.

Monk Eilmer of Malmesbury did end up with broken legs and a place in history. It would be unwise to repeat his early experiment as an example of human flight. That is unless a crude glider was replaced by four rotors, electric motors, some electronics and a powerful battery.

I share the hazards of a technical ability. Luckily my youthful attempts at flying with a parachute made of black polythene sheeting from a red barn roof didn’t result in any broken bones. Good luck to all who fly. Especially those who travel the furthest.

[1] https://www.nasa.gov/nasa-app/

[2] https://www.greeknewsagenda.gr/from-olympus-to-the-universe-where-greek-mythology-meets-nasa-missions/

[3] https://en.wikipedia.org/wiki/Eilmer_of_Malmesbury

Transport of Flight Delights

Air Taxies are becoming a reality. It’s not Science Fiction anymore.

The history of the “hackney carriage” is along and illustrious one. They remain firmly attached to the road. They do move with the times. From horses to combustion engines to electrified cabs[1], I wonder if London back cabs will adopt Hydrogen fuel next?

Providing safe and reliable public transport for about 8-passengers, in reasonable comfort, with a limited amount of luggage, they are a vital part of the city landscape. Ferrying people from place to place and even going south of the river (a popular saying from the people who live north of the River Thames).

In New York, “Yellow schools of taxi fishes” in a song by Joni Mitchell. Schools or sholes of taxies swimming in a sea of traffic. Frantic and colourful as they are shown in a lot of 1970s movies. A chaotic scene where the protagonist runs out into the middle of dense, barely moving traffic.

What happens when these modern convinces take to the air? If they were still with us, I’m sure Flanders and Swann[2] would have written a song about this new marvel. The distain of London buses towards black cabs is there in the lyrics. So, as air taxies take-off, as it were, will the cab drivers of the city protest or join the ranks of new flyers?

Please don’t answer that question. I’ve in mind more serious issues. The whole history of aviation safety data analysis shows us an immutable fact. Take-offs and landings are riskier than flying in at altitude. It really matters not if flying horizontally or vertically.

How does this come to be? A simple answer would be to say that the results of aviation accidents eventually end-up on the ground. Gravity does its work. Put that aside for a moment. Take-offs are optional but landings are mandatory. That’s a traditional saying that amuses non-flyers but is all too real to pilots and alike.

The act of taking a flying machine from the freedom of movement in 4-dimensions to a preselected stationary point on the ground. Those policies and plans that are published refer to Vertiports being established much as Heliports have been in the past. Some may double up. The theory is good. A pre-defined clear space that can accommodate a typical eVTOL aircraft used as an Air Taxi, with all the necessary operational and safety provisions. Surrounding areas protected from the down wash of the Air Taxi. Care to remove any foreign objects from the vertiport surface. A mini terminal to add to the cityscape.

One of the biggest variables in this brave new world of public transport is as old as the hills. It’s the local weather. Dubai can roast an aircraft with clear skies and 50C while Aberdeen can soak them in rain and impenetrable mist. Dust and wind can blow through Marseilles while deep snow and ice covers Montreal. Whilst in Lahore the air itself can be hazardous.

Terrestrial vehicles do cope. Often this means that there are different rules and regulation that take account of the local conditions and priorities. The impatience that some advocates have for a rapidly formulated globally set of harmonised rules and regulations might be misplaced. In fact, it may even impede the introduction to service of Air Taxi services.

Since I’m discussing the busy urban environment, I can presume that any accidents and incidents will be the focus of a great deal of public attention. Ultimate safety is a nice aspiration, but then reality takes hold. There will be occurrences. When they happen, city councillors are going to have their say.

Post 1: Air taxis are an exciting development in air mobility, but to get off the ground. SESAR Joint Undertaking | EUREKA- European Key solutions for vertiports and UAM

Post 2: Infrastructure Developer Highlights Timeline Convergence as eVTOL Certification and Vertiport Development Both Require Nine Months, Creating Binary Decision Point for Property Owners | citybiz

POST 3: The Air Taxi topic has become newsworthy this last week. US lawmakers push FAA certification reforms for eVTOLs:

https://aviationweek.com/aerospace/advanced-air-mobility/lawmakers-push-faa-certification-reforms-evtols

https://www.flyingmag.com/congress-faa-electric-air-taxi-certification/

Click to access Aviation-Innovation-and-Global-Competitiveness-Act-Final-Bill-Text.pdf

[1] https://www.levc.com/

[2] https://youtu.be/7yHrpPRYgYM

FLANDERS & SWANN – ‘A Transport of Delight’ – 1957.

Determinism in Aviation Safety

The arrow of time. We fly from past, to live in the present and anticipate the future. Sir Isaac Newton would be proud of us. By unravelling laws, that where always there, the means to anticipate the future was illuminated.

In civil aviation, we have devised and grown a whole regulatory system that depends on learning from the past, doing calculations today and flying with a belief that we know what’s going to happen next. Flying is predicated on a reasonable degree of predictability. There’s clear logic in this way of thinking. Just imagine powering up a couple of massive jet engines and starting a take-off roll without being extremely confident that at a certain speed the laws of physics will do their part and the ground is left behind.

We don’t establish a reasonable degree of predictability by looking at a crystal ball or taking up alchemy. Yes, we do still depend on reasoned expert opinion in addition to doing calculations. The minute those expert opinions start to shift away from grounded reasoning and careful deliberation then danger is afoot. This is one of the arguments for treading carefully when political opinions start to come to the fore. The laws of physics are not established by a public opinion poll. Nevertheless, it’s equally polarising to say that there’s no political dimension in the aviation regulatory system.

Anyway, that’s not the subject that was on my mind. Conversations about Artificial Intelligence (AI) are more prolific than those about self-help books. Even the shelves of popular high street bookstores are starting to fill up. The non-fiction titles with AI, either as the main subject or as an adjunct are numerous. It’s the fashion to write something literate or purely speculative.

I’ve mentioned the word “determinism” before. It can be interpreted philosophically or in a more scientific and technical manner. Determinism is a belief in the inevitability of causation. That chain of cause and effect that is so familiar to anyone reading an aviation accident report.

Understanding what causes something to happen in a moment in time goes back to my initial subject of a reasonable degree of predictability. In aircraft certification, no matter how complex the system, when presented with a system safety assessment we expect a comprehensive and reasoned set of statement. Predictions about the “what ifs”. What if an aircraft part fails and what happens next? What happens in combination with other failures?

This is where AI is potentially problematic. All the reasoned arguments in the world go out of the window if a system, subject to the same conditions, behaves one way on a Monday and differently on a Friday. Not to mention the weekend. I could say, AI is remarkably human in that respect.

The subject that was on my mind is not the inner working of complex aircraft systems. Certification experts are on that one. It’s possible to put boundaries around the behaviour of some aircraft systems. What’s more fascinating is the evolution of AI interactions with us mere mortals.

Let’s say I have the responsibility for return to service of a transport aircraft that has been subject to maintenance. A pile of documentation will provide the evidence that the work conducted has been correctly completed. It conforms. Amongst that paperwork might be an output from an AI driven diagnostic system that flashes a green light to say everything is fine.

Now, playing with the “what ifs”. What if it’s not fine given that the conditions experienced were way outside the AI systems training and it does a creative hallucination. The person signing the release to service documentation would have no idea or facility to question the green light. But it’s their signature that matters in the process of return to service.

There is a point of concern.

POST: There’s a lot going on out there Enhancing aviation safety with artificial intelligence: A systematic literature review on recent advances, challenges and future perspectives – ScienceDirect

The Future of Driving

What next? There’s a growing number of Electric Vehicles (EV) on the market. In fact, the diversity of choice doesn’t make choice easy. Such a variety of different sizes and configurations. Cars big and small. Hybrids too. Every new generation offering more range and more bells and whistles (technology).

My car is getting near to its 11th birthday. It runs exceptionally well. Trouble is age, ware and tear, can’t be escaped. Bills start to ramp up as millage takes its toll even if it hasn’t done – yet. German engineering isn’t always what its cracked up to be except my car does fit the stereotype. Temptation is to buy another one.

My first trip to the US was back in the early 1980s. Four of us drove up and down the west coast. Seeing spectacular sights and meeting amazingly friendly people. American cars of that time were of the Cagney & Lacey generation. Meaty metal boxes that handled like a crate of jelly. Gas guzzling but, who cares, gas was cheep in comparison with European prices.

Wide empty roads, outside the cities, where the landscape filled every vista with new wonders. City driving wasn’t so pleasant. Freeways where the occasional Blues Brothers like police car buzzed past at speed. Air quality dropped a million percent (exaggeration). Jams in more lanes than we’d ever imagined possible.

So, are Electric Vehicles (EV) the spawn of the devil? I take the point that not everything is as rosy as the marketing departments of the manufacturers would have us believe. Some prestige models are bulky and heavy. These are not well suited to the narrow pothole heaven of England’s poorly maintained roads.

That said, the change is upon us, and it would seem foolish to go backwards. Once over the initial purchase price, which does seem to be coming down, EVs don’t cost much to run. There’s a simplicity of electric motors which a high-performance reciprocating engine can’t match. Not only that but high-performance reciprocating engines have probably reached the limits of what can be squeezed out of them. Decades of development in reducing tail pipe emissions.

It’s clear Electric Vehicles (EV) have a long way to run. Battery technology will continue to improve. That’s one to bet the house on. It’s because there are so many applications for high power density batteries. If you are aiming at a Nobel Prize in Chemistry, that’s the way to go.

Driving a car with no tail pipe emissions does have a holier than thou feel about it. If we want cities to be healthy places to live, then something must be done. I wouldn’t want to live near the world-famous Hanger Lane Gyratory[1]. Or anything like it. In England we built massive road systems on top of streets designed for the horse and carriage.

Looking at new cars, like the Mercedes-Benz CLA[2], I must admit I’m tempted. Putting that up against the lumbering thundering rust buckets of the 1980s and there’s no comparison whatsoever. Whether it’s sheer performance or climate change that motivate a purchase decision, the days of conventional petrol and diesel cars are numbered.

[1] https://uk-air.defra.gov.uk/networks/site-info?uka_id=EA6&provider=london

[2] https://www.mercedes-benz.co.uk/passengercars/models/saloon/cla-electric/overview.html

The most important invention in your lifetime is…

A standout invention is one that is enduring. It’s celebrated. It shapes what comes next. It addresses an issue that’s been there for a long time. That just it – time.

I’m stretching the intent of the question a bit. Invitation doesn’t always have a single moment of realisation. Theory and experimentation come together to show promise. It’s latter that practical applications start to flow from that innovation. For me, the key invention is the beginnings of atomic time. The ability to measure time with precision.

Now, we know that past, present and future are the way we experience time. Not time itself. Having create clocks that gain or lose less no more than a second in billion years is an astonishing feat.

Today, a great deal of the infrastructure that surrounds us, and we hold in our hands, depends on precise time. Communication systems exploit it. We navigate using this asset. Society has been and will continue to be transformed.

Yet timekeeping systems have not reached their limit.

The Digital Dilemma: On Youth

Every modern technology challenges us all. Technologies’ relentless path is unstoppable. Technology inevitable is a two-edged sword (good and bad). Not everyone will accept these statements. This is my observation of the last 50-years in the UK.

1976 was an incredible year. It’s being celebrated as the year of Punk Rock. That’s just one snip out of the scrapbook. In fact, the music scene was over briming with diversity in that year. Low-cost microprocessors were coming on to the market. Forward thinking innovators, like Sir Clive Sinclair[1] were thinking about how to put these into the hands of everyday people. Trade Unions were signalling concern that this technological revolution would mean the loss of millions of white-collar jobs. Politicians ran around in fear of a severe threat to the established social order.

Let’s just say, there was no less a public clamour about how to react to the transformations that were coming down the road as there is here in 2026. What is a 16-year-old to make of all this at any time? I was 16 in 1976. Now, what’s it like to be 16 faced with current relentless and often troublesome pressure of social media?

That’s one phenomenon that I didn’t have to deal with as an energetic engineering apprentice with the thrust for speed and motorcycles. That said, all the stuff we hate about social media, bulling, harassment, intimidation, hurt, and suffering were still ever present in society.

My starting point is that banning things is to be avoided if there’s a better way. It’s profoundly illiberal to reach for the law to ban as the only approach to problem solving. My caveat. If there’s evidence of systematic harms being caused to a vulnerable population then a ban may be inevitable. In this I can cite the restrictions that are placed on young drivers and motorcyclists. Without legislation restricting activities our society cannot accept the resulting death toll.

Age limits are part of a civilised society. So, a dilemma exists. What level of harm triggers a ban? That is assuming that an enforceable ban is the most effective way of achieving reduced harm. In reality, a ban by law does not aways work. Either people find a way around it or it turns out to be unenforceable. It can also become smothered in processes and procedures to be rendered useless. Exceptions and qualifications.

How about banning mobile phones or social media for young people? That’s two quite different moves.

Mobile phones are part of the digital landscape. No one should go through future education without a necessary exposure and grounding in the digital world. It’s their world. It’s not going away. Social media is different, but it’s a nebulous product. It’s not so easy to sit down and write a useful and workable definition of what’s included in social media. Even if a law is written about social media, within a brief time it will turn into something different. It’s a combination of communications technologies.

What we do need is regulation to minimise harm done. That needs to be agile but comprehensive. A most perplexing task. Up until now, regulation is the digital realm has been ad-hoc and focused separately on application areas. Much more work is needed.

[1] https://www.theguardian.com/technology/2021/sep/16/home-computing-pioneer-sir-clive-sinclair-dies-aged-81

Visual Cues and Decision Making

Back to visual perception. Initially, it may not seem right to focus on one human sense and not discuss the others. We are multifaceted humans. The brain takes advantage of all its senses, when they are available. We’ve evolved with amazing capabilities.

The interesting notion that certain wines taste better when accompanies by certain music is a wonderful example of how interactive our systems can be. That’s without us having any conscious control over their immediate intimate workings. Parts maybe hardwired and others soft wired and adaptable.

Vision plays a dominant part in enabling us to move around. We haven’t yet evolved echo sounding, like bats and dolphins. This is not to say that those who loose vision can’t compensate to some extent, but they don’t fly aircraft or drive fast cars or become astronauts.

My thoughts arise from exposure to several aspects of our dependency on seeing the world around us. To begin, at the early part of my career, it was indeed the process of taking sound imaging and making it usable for recognising objects. Converting the information that come back from sending sound pluses through water into an image must deal with a dynamic environment. Interpretation of such electronic images can be the difference between hitting an object at sea and avoiding it.

Later, my design work concentrated on information presented to a pilot and what happens next. That whole arena of the aircraft cockpit is one big interface. The link between the senses and the decision maker. I’m not straying into the interminable debates about human factors.

Let’s stay with the trend that’s in front of us in every walk of life. That’s the dependence on recognising and acting on information that is presented to us on a nearby screen. In so far as I know, humans didn’t evolve with this need to relate acutely to closely presented information as much as reacting to distant stimulus. Afterall if a hostile animal or dangerously armed person was heading towards me at speed, I wouldn’t sit around debating the subject.

Aeronautics has experience in this shift of attention. At the start of my career aircraft cockpits where mostly knobs and dials. Mechanical indicators and filament bulbs. Sometime unreliable. Still the idea of flying by the “seat of the paints” prevailed. That centred around situation awareness, predominantly guided by looking out of the window. At the outside world. Distant vison equally, if not more, important as looking two feet ahead at a panel. Over the last five decades the above has changed radically. Instruments are large flat screens dotted with an array of colourful symbols offering every aspect of “situation awareness”.

Now, this is happening to cars. Most new cars have electronic screens. The expectation is that we humble humans have transitioned from simple mechanical dials to a fascinating world of colourful animated markers and whizzy logos. Despite the glorious technology the basic function remains the same. That is the link between the senses and the decision maker.

Adequate levels of visual perception being the number one attribute a pilot or driver is expected to maintain. This continues to be true as automation does more and more. What maybe a long-term trend in human evolution is that shift between the importance of what’s a couple of feet away and what’s in our surroundings. Will we become less sensitive to a personal experience of what’s more that two feet away? I wonder.

Evolution of

Looking at the weird and wonderful picture of an unlikely lump of materials with wires hanging off, it’s easy to dismiss. A laboratory experiment that drew together theory and practice to produce a brand-new electrical device. Not something that occurred in nature. Even though its behaviour is of that of materials in nature.

Certainly, the implications of this experiment could not have been fully understood at the time. That said, progress to industrialise this new device was rapid. By the time of 1956, the “inventors” were awarded a Nobel Prize in Physics. In 1947, the transistor, was a fruitful combination of science and practical thinking in a laboratory where that was encouraged.

Bell Laboratories, given its history was a logical place for arguably the most important modern invention to be first put together. Arguing over “most important” there are several matters to consider. For one, how universal, how ubiquitous would this humble device become? Would it have a dramatic impact of everyday life for decades after its invention? Would it change every aspect of human organisation? Would its design, development and production become essential to the world? The simple answer – yes.

My first encounter with the germanium transistor was as a boy in the 1970s. Stripping them out of junked radios and record player amplifiers. Building simple circuits. PNP germanium junction transistors were tiny tin cans with three colour coded leads. With a soldering iron and a primitive breadboard there were plenty of designs in popular magazines to copy. Now, this is considered as vintage technology since germanium has long given way to silicon.

The clock, the radio, the bathroom scales, my shaver, my toothbrush, even in my bathroom every appliance contains circuits that are transistor based. It would be possible to live without some of these items, or at least substitute them with the mechanical versions, but that’s only for eccentrics, museums and heritage houses.

In 1947, the prototype transistor was on a bench being studied. It came along too late to play a part in the huge leap forward technology made during World War II. What became apparent is that the technology that had been developed using thermionic valves was convertible into a transistor-based versions. Size shrank and performance improved dramatically.

What’s my message? It’s another way of looking at so called artificial intelligence. Technology doesn’t come out of the blue. It doesn’t plot new pathways in the first years of its invention. It often takes things we already do and speeds them up or makes them cheaper or makes them more lethal.

We create another stepping stone upon which further developments can take place. So, maybe there is a South Sea Bubble about to burst. Much of the frantic investment that has taken place assumes that artificial intelligence is of itself a wonder. Let’s say it isn’t. The wonder is what it will allow us to do. Much of that side of the coin is a massive unknown. Much as the three who invented the solid-state transistor could not have envisaged tens of millions of them stuffed inside every computer chip on the planet.

Vintage germanium components are sough after by specialists. Apparently, audio amplifiers sound better to those who are sensitive to certain musical tones. Artificial intelligence has a proliferation of applications. A lot are gimmicks. Some are extremely serious.

POST: It’s often the boring stuff that can best be improved rapidly, note: One real reason AI isn’t delivering: Meatbags in manglement • The Register

Dynamics of Change

This theory of mine may have been voiced before. It’s a way of looking at the momentum behind progressiveness but with a reminder of the realities of the difficulties of change. Any progressive movement implies change. That change may not always be comfortable.

Ever looked at the teeth of a wood saw. There are a variety of geometries[1]. The overall purpose is the same regardless of the shape and size. Different materials too. A typical saw is unidirectional. Push in one direction to make a cut and withdraw to prepare for the next one.

Then look at our world of ever-increasing data. Piles of accumulated numbers. For the most part, as simple creatures, we plot “x” against “y” to get an image of how one parameter is related to another. In the real world, there’s a lot more axis and dimensions. More than a head full.

On one axis I could put that nebulous parameter “progress”. The horizontal axis, as it often is, that unidirectional human experience of time. So, “x” equals time, as the years clock by, and “y” equals a measure of human “progress”.

What do I plot on blank graph paper? Take the shadow of the saw tooth at an incline and arrange it so that it rises with time. Remember to get it the way round that suggest that the saw is being used. Depending upon the rate of the incline and the rake of the saw tooth, we go forward with time and then stop or reverse a small amount. However, the overall direction is always to climb. This is better drawn than written. 

How does this illustrate the mythical quality of human progress? Being a fan of both disproportionate relationships and pareto[2], I accept that things move at different rates subject to different stimulus. Sometimes fast with only a tiny push. Sometimes slow even with a massive amount of force applied.

Take, for example, the technical progress that was made, driven by the necessities of war, in the 1940s. Aeroplanes went from relatively crude flying machines and esoteric racers to incredibly capable craft that came to dominate the skies.

Now, take social progress at improving housing conditions in our country, over the last couple of decades, and the speed of improvement has been remarkably disappointing, to say the least. Pathetic would be a better description.

Progress, or lack of it, has a vast number of different characteristics. However, the main one that either delights us or troubles us is speed. The speed by which things change for the better. Swiftness of advance, or setback after setback and even moments of reversal. Just like a saw tooth. Great strides are made. Then difficult periods and reversals occur. It’s predicable what I’m going to write next. The western world is in one of those moments of ambition but backsliding and sluggish progress. Negativity abounds.

Is perspicacity the right word to use for my theory.? It’s crude. On the upside there’s an underlying positivity described in my simple model. Don’t look to the setbacks and stupidities of the day, look to the longer run “progress” that is in prospect. And help make it happen.

[1] https://www.blackburntools.com/articles/saw-tooth-geometry/index.html

[2] https://betterexplained.com/articles/understanding-the-pareto-principle-the-8020-rule/

Age Restrictions

Inevitably whenever there’s a decision as to what is age-appropriate one’s own experience comes to the fore. The experiment that is going on in Australia is one to watch. That country has taken a step towards the regulation of social media that provides defined limits. From zero to age 16 there’s to be a ban, or a restriction as the more diplomatic commentators say. One discussion could be about the whole necessity, and possible effectiveness of a ban on social media and another about the age limit that has been set.

This is one of those debates where there are good cases to be made on both sides. I could start by citing examples of harm caused, in particular cases, of social media use by children. That would reinforce a compelling argument for restrictions by law.

Alternatively, looking at the subject in the round, I could wonder at the position of young people first encountering an avalanche of social media on the day of their 16th birthday. Or the creativeness of young people in finding ways to evade a punitive law.

For me, my 16th birthday was a day of great liberation. Growing up in the countryside has lots of advantages. The downside is the effort needed to get anywhere beyond walking distance. No buses. No trains. Just a pushbike. Miles of country lanes, green fields and distant villages.

No demanding, distracting all-encompassing digital paraphernalia. Maybe a radio, cassette recorder and a pile of vinyl records. For me a couple of beaten-up cars and motorcycles too. As per the famous four Yorkshiremen sketch: try telling that to the kids of today.

Yes, my 16th birthday was a day of great liberation. That because of the law. I wasn’t alone. It was there for every schoolboy who could afford one. Shiny in the showrooms. Names like: Fantic, Gilera, Garelli, Yamaha, Suzuki and Puch, were all on our list of wants.

In December 1971, the British Government create legislation that restricted 16-year-olds to 50cc mopeds (motorcycles with pedal assistance). This was a worthy effort to improve road safety and reduce the carnage of motorcycle accidents. What was unexpected was the frenzy of innovation that this well-meaning law triggered. Motorcycle manufacturers set to their drawing boards and radically transformed the moped. I do mean radically.

I came in at the end of this era. By early 1976 manufactures had squeezed every drop of performance that was possible out of a mere 50cc engine. Designs had gone from uncomfortable, sluggish commuter bikes that would feel embarrassed to own, to sporty fast racing machines that were extremely desirable.

Ah, the unintended consequences of worthy legislation. For me this was wonderful. It opened a whole new vista and introduced me to one or two roadside hedges. Waiting for me on my 16th birthday was one of the best. A Puch Grand Prix Special. In black and gold, this really was a fast and refined two-stroke machine. Even with cast alloy wheels and a front disk brake, which was whizzy for the time. Racing along the main A30 the bikes gearing was such that I went fastest downhill, while my mates Garelli overtook me going up the hills.

What can I say? When it comes to age-appropriate the results may not be what is intended.

Note: Reference: Funky Mopeds! The 1970s sports moped phenomenon. Richard Skelton. Veloce Publishing. ISBN 13 978-1-84584-078-5  www.veloce.co.uk