Stories

This is https://jim-quinn.blogspot.com/ News Stories

For SMR at GBN - see Ability at https://jim-quinn4.blogspot.com/

See also https://jim-quinn0.blogspot.com/ Qualifications Definition

and https://jim-quinn3.blogspot.com/ Cash, Ideas for Govt

and https://jim-quinn4.blogspot.com/ JQ extended CV

and https://jim-quinn51.blogspot.com/ The Great Depression

and https://jim-quinn6.blogspot.com/ Funding business

Sorry about the font size changes - this Google blog software is lousey - no matter I correct to Medium size, I find a little later some of it has changed to enormous!!

Website Contact Forms are useless - we are ignored, for they never return to you what you send (so no accountability for they NEVER received it, did they!!), and I have to put my own date and time in it, for even that is NOT recognised! Rarely is an attachment allowed.

With an email address I can send to a few addresses, to whom they would all know it had been sent - and attach a drawing or map or presentation ppt.

A Wealth Tax should be adopted on 26march2025 please:

https://taxjustice.uk/blog/how-to-avoid-welfare-cuts-at-the-spring-statement/?

And Sir Tony Radakin, Chief of The UK Defence Staff ?

Mr Putin says that a temporary ceasefire will allow the "West" to regroup..... while he wants it sorted in ONE GO, for a permanent therefter. I prefer Mr Putin's thinking, from both points of view.

Jim 15march2025

15march 2025:

Musicians crying about AI music and lyrics competing with them, and wanting it stopped - clearly today's software is able to challenge the human musicians Ability. Suggests the humans are not so clever after all, for the software being used is not complex, but relates meanings of words and rhyming sounds to produce poetry (lyrics), and plenty of examples of music in Databases.

Meanings of words have been in Dictionary Databases for many years, and it was a small step to relate them together to look like normal English Grammar as in ChatGPT (Verbs and adverbs together, nouns and adjectives, from meanings not just spellings).... and thus poetry in another step.

I will say about ChatGPT that it produces a paragraph or two of Draft which my Professional Content Strategist daughter uses to give her a start, but she modifies it a lot, to fit her idea of Enthusing People with interesting Factual Text - for a few Travel Companies.

Poetry and Music illustrated by Morecambe and Wise:

Make me happy, through the years,

Never bring me, any tears,

Let your arms be as warm as the Sun from above,

Bring me fun, bring me sunshine, bring me love.

and thus I love many different human's musical poetry, no matter its software equivalence......

The software is not very complex, and nothing at all like the discipline, complex calculations and manufacture that engineers have to TEST, to prove they work..... and like musicians, to sell. Oh, Government does not sell disciplined (Depth first) solutions to the educated, but to the ordinary average intelligence person in the street.... No wonder Engineers Object, for their ideas are often quite shallow!

REAL AI, wil not be available for decades if not centuries, for that will "ask why, will try to conclude reasons, will try to produce solutions, like THINKING humans", that western politicians unfortunately cannot do in depth, relying mostly on guess and popularity.......

My Depth first, Breadth first Chart explains - Engineers Depth first, thinking deeply and cost effectively to provide a good solution or two at top level, while Politicians Breadth first, the latter only requiring good memory.

The weaving dotted line below shows the Engineers FIRST attempt at finding a cost-effective solution, later in time, they will ALSO try the right hand route and tributaries beyond that...... and my chart shows only a couple of possibilities - in my world there are more than that! Solutions require comparison before concluding which is preferred.... and the Politician will only at best know of G,H and J with virtually NO knowledge of how the Engineers got there. Unfortunately, they bought American F35B, instead of believing in us here, at home...... And they also forget that funding can mean new engineering thinking.

The Americans led the extra development of the Harrier aircraft (the AV8B), because they funded it in America - not at all because Britain's Engineers were incapable of doing it, but the UK Govt certainly allowed the USA to do it, by not funding us - and so the USA gained OUR IPR, at a relatively low cost to them. Over time, the USA has gained loads of IPR from us..... starting with the radar magnetron in WW2 from Tizard and Bowen.

Cost Effectivity means in factory planning and numbers employed, as well as complex calculations (in my personal case, thermodynamics and creative software, simulating real very high airspeed aircraft alternative engine designs, offered for evaluation (at all altitudes and airspeeds) to Aircaft Companies and Governments.

Given that simulation software, other disciplines in the Engine Company are able to deeply investigate their own solutions - Stress Office determines structural Strengths and Materials needed, by looking all over the flight envelope, not just at take off as measured on a test bed....... The Tornado was the First Aircraft Ever to Have: A Fully Simulated Engine at all altitudes and airspeeds (including accels and decels later), after previously offering 4 different Fully Simulated Engine Designs at Vee Stage 2 (below), BEFORE the RB199 Launched into Stage 3.

Pegasus and Olympus (in Harrier and Concorde, both Designed before 1965) not at all lucky to have Our First Big Capability Computer in 1965 Design Engineering - the English Electric KDF9 ....... And Design from 1967, to 1974 First Flight and subsequent Tornado Evaluation, benefitted enormously from it.

Thus, I have illustrated THINKING not GUESS-TIMATING.....

Jim 15march2025

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15march2025:

I note that SkyNews TV has NO news today about the Continuing Killing and appalling Humanitarian Situation in Gaza, Forced on them BY Israel (100 Gaza Arabs dead in the last month, Very few tents, nowhere near enough food and water allowed into Gaza.... ALL ISRAELI RESTRICTIONS EVERY DAY), but Sky only informs about the death of one man in Britain.

Al Jazeera reports this developing NEWS, every day - the British People are being TOTALLY misled by their British media.....

Thankyou Al Jazeera, for being the best.......for all over the world's news, not just little local, like British and USA National media.

Also

On Sky News this morning: "PM: Putin must not play games with ceasefire" about Ukraine's future - that is an ATTACK on Mr Putin, rather than a NEGOTIATION with him, and I consider this DESPICABLE behaviour by Mr Starmer....... leading to more conflict, for Mr Starmer has not listened at all to Mr Putin, and THOUGHT CONSTRUCTIVELY about it!

Mr Putin went into Ukraine because "The West" refused to listen to him - he gave fair warning to Mr Macron in his lengthy visit, but Mr Macron did not listen, gave nothing in that "negotiation" and Mr Putin invaded, just as he said he would do to Mr Macron, unless NATO pulled back from his border.

Yup, NATO's aggressive fault (I am right, I am right, I am right they say, and You are wrong, you are wrong, you are wrong they say), compounded since 2003 with Estonia and Latvia suddenly joining NATO for NO reason, other than USA hypochondria...... scared of rabbits!

President JFK in 1962 objected to CCCP missiles in Cuba, over 300 sea km away from the USA (Miami), and Kruschev withdrew them without conflict, but from 2003 onwards, NATO were millimetres from Russia - NATO's absolutely STUPID people, far far too aggresive, and Double Standards (AS USUAL for the WEST), .....

even Riga is only 200 tank km from Russia, and that is a WHOLE of Latvia away..... with Customs Officers on both sides at The Border seeing "the white's of each others eyes" - millimetres, as I said!

Mr Putin said many times, "Oi pull back", but NOBODY listened and NOW.... the result, in which Mr Putin's military seem to be slowly gaining ground..... to which the LITTLE people object and scream "stop playing games with the ceasefire"........

Mr Starmer and Mr Macron ARE currently playing Vee stage 4, having ignored Stage 2 for Years..... where Mr Putin was!!

Jim 15march2025

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14march2025:

email Dear Mr Antonio Guterres,

Imagine what I mean please.

Look at your face in the mirror from a distance of say 15 cm, then glare a little.

This is Mr Macron and Mr Starmer eyeing Mr Putin - any little trigger ignored do you think,.......or Blown UP?

You think any peacekeping is required if Mr Putin agrees a stop? I do not - I see Mr Putin quite calmly before invading Ukraine advising his needs of aggressive NATO. He welcomed Mr Macron for lengthy discussions, but Mr Macron Gave Nothing of Mr Putin's wants - hence the invasion, because NATO really are TOO aggressive.

I think Mr USA panic triggered Estonia and Latvia to join NATO in about 2003, for the USA are scared of every little rabbit that pops up - they are knee-jerky gun-slingers after all, with about 750 military locations around the world (China have none for example), and Still no different from Billy The Kid or any other trigger happy immigrant forcing themselves into the USA's Indigenous People territory.

I think you will find Mr Putin is a stable individual, and once he agrees how much Sovereignty is necessary, he will abide by it, but NATO/Europe will have to calm down first...... If he does not, recruit your UN peacekeepers from places like Vietnam, Kenya.....? who have had nothing to do with the conflict so far. Certainly not wanted is Europe's Glare!

Jim 14march2025

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13march2025:

https://www.imeche.org/news/news-article/high-speed-rail-group-calls-for-new-affordable-and-realistic-hs2-plan

My comment:

I will start by saying that the original Gordon Brown concept for HS2

was to launch an idea, and good for him for that, but never

thoughtfully challenged - they are doing EXACTLY what he said

for heaven's sake - WHY?

1) the 2017 HS2 Act identified a route, but which included 33 miles

of tunnel betwen London and Birmingham - has anybody asked

whether passengers want to be in the dark no-vis tunnel for one third

of the journey? I like rail because I can look at the landscape as I go,

which I cannot enjoy driving my car. Even at night, the street lights

are fun.... Sorry, I will travel to OLD Birmingham New Street, never

HS2's Curzon Street.

2) the 225 mph tech is expensive and saves a bit of time on the

journey - but the journey takes nearer three hours than one, for

I have to travel from my home via bus or underground to Euston,

and repeat at the other end. So saving 20 minutes on the HS2

part only reduces my time to two and half hours - for HOW MANY

BILLIONS? What a BIG waste of money..... when the Engineering

Industry wants capacity, not so much speed to get people out

of their cars - Oh, back to (1) above......

3) 150mph would be quite good enough, and the tech readily

available for that - so much lower traction engine cost AND you

do NOT NEED such a "Straight Line" route because very high speed

cannot go round corners so easily - 150 mph trains could go

AROUND those hills (like Brunel designed for the GWR to Bristol)

that HS2 is tunneling under....... Aaah, NOBODY in Government

or HS2 Ltd even began to think of Cost Effectivity did they!! And

they have had since 2009 to THINK, but never ever have.......

4) the current average speed (every hour) betwen Euston and BNS,

or vice versa, is 90mph - between Liverpool and Leeds, about

50 mph - where best to get cars off the road - and who needs

investment to grow the economy most - the Midlands not the

wholly ridiculous expensive London - why is the Capital still

in London and not the Midlands somewhere - where people can

afford to live, not have to commute from Swindon just to have

a job and earn enough to live......on trains for at least an hour

each way every day - you cannot buy a house in London for less

than one million, so you have to commute from far away - why

London for a job? The crazy way politicians DON'T think about

OUR expenses.... just their refurb of the crumbling Palace of

WestmOnster - MOVE IT PLEASE to a new building north of Brum,

AND save huge amounts of Money, by doing what Munchen did

after the war - rebuild with modern materials and tech, making

it look the same as Heritage was....... far far lower cost and good

long life to it too.

5) The article that triggers this Anger from me, is just the same

as I have been saying to Govt for a long time now - investment

NORTH of Brum please, not south....and not 225mph either! JimQ in Stroud, on the GWR no tunnel route from London...... where I will

never go by car.

........................................................................

MPOX Spreading worldwide -

https://www.who.int/news-room/fact-sheets/detail/mpox

and danger to others too:

...... just received 11mar2025 Jim

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6march2025:

Asking a child how it feels is one thing, but to expect them to KNOW what they NEED TO KNOW is ridiculous. They are not "young adults", but incompetent idiots until they learn from us big chaps what matters!

You will see in the article, that some kids do not know the meaning of NO (just as I have been saying in my previous several Smack presentations), for they slowly evolve from a Chimpanzee like brain content, and take at least 16 years to BEGIN to learn what adults know.

Come on, stop treating them like YOUNG ADULTS who know about LIVING from the age of six - they are GROSSLY UNeducated, and have to go through a Rich Hormonal and Emotional Puberty, before they even begin to learn what an adult knows!!

They are like laptop computers with VERY POOR software to start with....... and ONLY Disciplined Careful Training through "brain software updates"

(where you are TOLD what to do, sometimes with helpful explanations, and NOT AT ALL by Negotiation, which Implicitly Assumes they are Adults already, and which the i newspaper so suggests is happening)

to Improve Themselves will result in a good contributing adult, we ALL hope.

JimQ

PS: Rubbish spoken by Keir Starmer in Washington DC with President Trump a week or so ago, claiming freedom of speech exists in UK - is a LIE, for WE are ALL Ignored by UK Govt in its absolute autocracy, through NEVER listening!!! UGH....

When did You Receive a reply of any consequence? Never!

Contact Forms are also useless - we are ignored again, for they never return to you what you send (so no accountability for they NEVER received it, did they!!), and I have to put my own date and time in it, for even that is NOT recognised!

With an email address I can send to a few addresses, to whom they would all know it had been sent - and attach a drawing or map or presentation ppt.

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events@flightglobal.com :

Future of aviation: Runway safety
Date & Time	Mar 6, 2025 03:00 PM London
Webinar ID	832 9380 3024 A series of runway incursion and excursion incidents in the past 12 months has highlighted the importance of the industry continuing its laser focus on runway safety. Our expert panel will discuss what the data tells us and the role onboard and on-ground technology, as well as training, can play in eradicating the risk. ................................................................................................... 19feb2025: Mr Putin complained before the Ukraine Invasion in 2022, that The West ignored the Russian Effort in the East, to destroy Hitler's military when it came to the Normandy and VE Day celebrations, which were Much Eased in The West of Europe, as a result of the Deployment to the East of so very many Deutsch Military, leaving the West to many 1944 fewer. Jim to 80th VE Day, in Minsk Boeing 737 fuselage diameter = 3.76m = 148 inches

Further to the South Korea, Muan, Boeing destruction on 29dec2024, I have submitted today to EASA as follows:

https://www.reuters.com/world/asia-pacific/south-korea-jeju-air-jet-blackboxes-stopped-recording-4-minutes-before-crash-2025-01-11/ see the 01:10 video - the Boeing slides along the runway not on the grass, but Very Close (!!) to the End of the Runway was the Big Box destroyer (on the runway C/L too!). I expect the Investigators will have asked local camera people if they had any video of the aircraft before first contact with the runway.....

EASA ID #205461, 25feb2025 1944GMT : This is a follow up to the sequence of my EASA inputs, the last being ID: #205304, all of which were concerning the Muan South Korea Boeing crash on 29dec2024, which was destroyed by a Big Box Very Close to the end of the runway (it seems it was on the runway centre line too, surprisingly dangerous).

During the Muan Airfield design phase, it would have been reasonably easy to calculate how big an impact into that destructive Big Box was likely - was this done? For, given the actual result of the Boeing destroyed and so many lives lost, it seems to me that the aircraft should have been allowed to Cross the Public Road just outside the perimeter fence. The road may have been empty or it may have carried passenger cars, and deaths might result from that impact, but Far Fewer than the 179 who did die in that Boeing on 29dec2024. Was any of that Thinking, Analysis and Calculation explored before 28dec2024? The evidence is..... No, and That is a failure of the Muan Airfield Designers.

How far off the runway centre line would a Big Box be sufficiently safe? You must consider cross winds, nose steering falures, rudder actuator failures too - how far off the runway centre line is most probable? The aircraft designers must be asked - did You Ask? when formulating Aerodrome Design Regulations? EASA, FAA, and others are responsible for that of course.....

I have been doing some calculations of the impact of an aircraft hitting many saplings and trees up to 4m tall. It was easy to calculate the radius of gyration, k, of such a tree of mass 240kg - taking the tree as a triangle H high, so k = H / sqrt 6 = H / 2.449. And then with H = 4m, k = 1.63m. If the tree root was not lifted out of the ground it would be pushed flat by rotation about the root, with a big impact at say 2m high, and I assumed an impact speed of 130kts (67m/s) and thus omega = about 33 radians/s. Force then = M.ksquared.omega = about 21kN which slows the 78 tonne aircraft. Clearly the deeper the penetration into more trees the slower the aircraft becomes, so overall penetration distance calculation becomes difficult.

So, I need to verify my calculations in some way, and I thought to search the internet for aircraft crashes into trees (woods or forests), but there is nothing publicly available, but which you in EASA (and contacts in the FAA, and elsewhere) would have detailed records. Please therefore investigate your tree impact data, and observe how far aircraft do penetrate into trees relative to impact speed and tree mass, and let me know please. Thus my consideration of how to stop a similar to Muan South Korea high speed sliding crash.

A reminder https://jim-quinn.blogspot.com/ contains thoughts of the Muan Boeing loss of life on 29dec2024. Thankyou for your attention, but you should have responded to me by now ..... what are you doing? Please tell.

Jim

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17feb2025: Toronto Pearson Airport, Delta Airlines aircraft upside down - on landing you are strapped in to your seat belt obviously - if you release that belt while upside down, you drop a "long way" onto your head. Was that drop the cause of the serious injuries (to one child, one woman and one man, of 76 passengers and 4 crew on board)?

BBC said: https://www.bbc.co.uk/news/articles/c20g02djlv7o "Delta confirmed that a CRJ900 aircraft was involved in the incident at about 14:15 ET (19:15 GMT) on Monday afternoon." https://en.wikipedia.org/wiki/Bombardier_CRJ700_series

Internal headroom just under 2m in aisle, but 1.5m under shelf?

Self protection - one hand "above" your head, the other to undo the buckle.....

Jim

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Interesting RAIB Investigation Report: Elizabeth Line, London

https://www.gov.uk/government/publications/safety-digest-012025-manor-park/overspeeding-near-manor-park-24-september-2024

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18feb2025: https://pilotworkshop.com/tips/forced-landing-trees/

28jan2025 1325 GMT: Muan crash 29dec2024

I left it for you to think about - glide slope. An aircraft "will not drop" without engine power it will glide, but a pilot might force it down steeper.

A sailplane will achieve over 60:1 glide slope, often about 70:1 - that is it travels forwards a very long way (70) with only a small drop in height (1).

My old hang glider achieved about 5:1 - roughly the same as the USA Space Shuttle subsonic.

The Muan Boeing 737 may achieve about 15:1 glide slope, but not with 181 passengers? Boeing and the USA NTSB will know - if there is a video, did it show steeper?, and thus deliberate Pilot guided attempt to avoid a Water ditching...... and (normally) best thing! We all so wish A

Jim 28jan2025

27jan2025 1300 GMT:

The preliminary Muan, South Korea accident report released by South Korea's Aviation and Railway Accident Investigation Board on Monday said that feathers and bird blood stains were found in both engines. The report also said the plane's two black boxes — the flight data recorder and cockpit voice recorder — stopped recording about 4 minutes before the crash. Muan airport will remain closed until April 18.

This Muan report today, says both engines showed Duck (big birds!) ingestion and they released this photo below which shows the result on the starboard engine - the puff is the surge (catastrophic thrust loss) due to its bird strike. They made no comment about the undercarriage, but it seems clear to me that the Pilot had selected retraction for airfield go around in hope to avoid Ducks after being warned about them by the Tower, but the sudden thrust loss ...... dropped them? onto the runway (dropped or Pilot guided?, because runway "running out" into ROADS and WATER - map below - needs a video of just before the landing). The media said nothing about the Tower voice records transcript, which must surely be available! See my 02jan2025 thoughts below.

Jim

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The UK Govt Economist Rachel Reeves desires a 3rd runway at Heathrow with an extra 260,000 flight a year apparently - this to turn the already over loaded M4 London to Swindon road ..... into a car park? ....... and then flights have no passengers, being stranded in the very long car park !!

There must be other better airports to expand than continually shovel us all into London. Moving the Capital would be a better bet - to the Midands somewhere?

JimQ 23jan2025

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EASA Contact Form: 22jan2025

Muan Boeing Jeju 7C2216 crash 9am 29dec2024

This ID #205282 is a follow up to my submission in ID #205246

You will probably have got there already, but the common electrical failures in flight for both the 2008 Boeing 777 Heathrow crash and the 29dec2024 Boeing 737 Muan, South Korea crash, suggests that the aircraft fuel tanks were depowered......! ? - but why just before end of flight I do not know. Needs electrical diagram experts of course.

JimQ 22jan2025

See my AAIB Heathrow report disgust at

https://jim-quinn7.blogspot.com/2024/09/the-boeing-rr-heathrow-crash-in-2008.html

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Rallye Monte Carlo 23 to 26jan2025

https://acm.mc/en/official-entry-list-2025/

Sky TV channel ITV4 8 to 9pm Tuesday 28jan2025

JimQ

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I hope my daughter is OK amongst all this traffic this morning, 18jan2025 - and the British NATS don't fail again!

Jim 18jan2025

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New info 12jan2025 - Muan 9am 29dec2024 Jeju 7C2216 Boeing crash recorders stop minutes before the impact.

EASA ID's submitted: #205246 today, 205425, 205207, 205205, 205203, and the fkirst was ID#205201 on 2jan2025.

EASA ID #205246 said

It seems best to continue through your "Aerodrome" contact even tho this is about the aircraft.... It is a continuation of ID #205245, and its referenced previous contacts. My Muan crash analysis is in my blog at https://jim-quinn.blogspot.com/

The Heathrow crash in 2008 reported in AAIB 1-2010 also suffered electrical problems - the pilot even selected APU start during the descent finals! But no diagram nor discussion of that or the elecrical system in that very poor AAIB report, which is another reason I am suspicious of Boeing's Designs in this Muan crash too.

Please see my Heathrow crash review in
https://jim-quinn7.blogspot.com/2024/09/the-boeing-rr-heathrow-crash-in-2008.html
for analytical help to you -
my background is in Tornado Flight Development at Warton, England from mid 1974 where we had good and extensive recordings of course, not expected on a production aircraft of any sort, but encouraging very detailed analytical work...... as in this short blog - I hope you will agree.

EASA ID #205245:

This follows the sequence which started with ID #205201 and ended previously with ID #205207, but which follows further here:

https://www.reuters.com/world/asia-pacific/south-korea-jeju-air-jet-blackboxes-stopped-recording-4-minutes-before-crash-2025-01-11/
declares that the On Aircraft Recorders stopped a few minutes before the crash at Muan Airport, South Korea at about 9am on 29dec2024.

This type of incident occurred on the Boeing 777 crash at Heathrow Airport in 2008 (QAR stopped 45 seconds before crash - the disgusting AAIB non Report 1-2010 mentioned it, but did not explore it at all). The very poor AAIB 1-2010 was a cover up for something not mentioned odd?

JimQ

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29dec2024 0900am

The Muan airport, South Korea Aircraft crash, 15 year old Boeing

Boeing HL8088 7C2216 at near 9am 29dec1942 Muan, South Korea:

Skip to 31dec2024 2020GMT entry below to see thoughts on the crash itself

.............................................................

- the following looks at improving aerodromes themselves:

3jan2025 0530GMT: What if we plant many saplings/hedges on the grass runway extension (as in the Heathrow crash photos below)? That grass is never used by an aircraft except in a crash, so is dead space to the perimeter fence, and as long as the saplings do not grow into huge oak trees..... so choose the right structural sort of sapling, and a skidding aircraft will thus be brought to a stop, as we know they do in other "crash in jungle" accidents. Those saplings would have worked for the 2008 Heathrow crash too, and merely need replacing afterwards. The diameter of a Boeing 737 is 3.8m and of a 777: 6.2m, and of an Airbus A320: 4.0m, so we need saplings which grow to about 2.5m (about 6 ft) maximum, I think - that height is easier for pruning too, but I would rather not, for that is maintenance and costly over the years. I am happy to evolve that height in thinking..... primarily, I need a graph of height and pitch vs aircraft decel rate..... 3G nominal design? for almost all passengers survival. From 130kts say, 3G deceleration would be a stop distance of 76m (250 ft). Or 100kts = 45m (148 ft), 70kts = 22m (73 ft). Will the passenger seat mounts take that deceleration rate?

1) The field maple tree (Acer campestre) can grow up to 2.5 meters tall. I have found a pack of 12 on the internet at 60-80cm for $25, but I really need to know their height limit, and how long that takes. Buying at an already 2m tall is much more expensive.

2) Cherry laurel (Prunus laurocerasus) is a hedge that can grow to be about 2.5 meters tall. It has large, glossy green leaves and produces white flowers in the spring and black or red cherry-like fruits in the fall. I do not like this one, because of the fruits that will Attract Birds, and become Mushy on the ground when they drop.

The Field Maple Tree may be cost effective - needs a bit more horticultural advice/thought yet....

3jan2025 1205GMT: I thought I would explore a bit for starters ........ Google search provided several texts: Birds generally tend to avoid trees with strong, pungent smells, overly reflective surfaces, or a lack of suitable nesting sites, which can include certain varieties of conifers like Cypress and Pine, as they often lack the dense foliage most birds prefer for nesting; however, most birds will still utilize them for perching or quick shelter if necessary. Conifers with sparse foliage: While some smaller birds might use them for cover, larger birds may find it difficult to build nests in open conifer trees like Cypress or certain types of pine. Trees with strong scents: Certain trees like those with strong garlic or citrus smells can deter birds due to their overpowering odor. Trees with excessive reflective surfaces: Shiny leaves or reflective objects placed around trees can scare birds away due to their perceived threat. Birds also dislike the smells of peppermint, vinegar, citronella, chili pepper and chili powder.

The leaves of Box (Boxus sempervirens) have an acid smell.... does that deter birds generally or just one species or not at all? Common box: Can grow to be 2 meters tall, but can also be used for dwarf hedges. If left untrimmed, it can reach 3 meters in height. Buxus macrophylla 'Faulkner': Grows to a maximum of 1.5 meters and barely needs pruning.

We therefore have some tree selection options ..... and airfields will have different types of birds depending on locality.... so no one solution for everywhere? And a further thought - grasses do not smell, so the smelly sapling idea might actually be relatively beneficial at reducing birds around an airfield.....!! ? Not just at the ends of the runway either....

2jan2025 2105GMT: I have concluded there is no other cost effective slowing mechanism to prevent such as the long runway slide to impact of the Muan crash Boeing on 29dec2024. The following illustrates the sort of argument that Design Engineers go through when contemplating a problem. It is not a waste of time for I have not seen this argument anywhere before, and it all goes towards my CPD, for this sort of thing had to be done at some time, years ago, when dimensions for safe airports were (re-)established.

There remains the question of the location of the structure at Muan Airport, that the Boeing hit so violently on 29dec2024...... The investigation will answer that one -

Oh, Politicians (in South Korea too) stay out of Your crash investigation costly panics please, leave the Experts (Pilots, Engineers, Researchers) to it!! And, the crash recorder can be read within minutes once properly connected for a few significant traces, so stop the media telling everyone it takes months - this is the report preparation time, not the read it time to an initial understanding.

You can skip to 02jan2025 1650GMT

for the crash event description/thinking..... just after the Heathrow photos below. Or continue with my "what-construction" thoughts..... which do not produce any other low cost solution!

2jan2025 1950GMT Cost effectiveness matters - how many runway sliders have there been like at Muan, in how many years, and how many deaths and costly injuries (and aircraft repair costs or writeoffs too) - new airport crash prevention construction costs money - what Should we Afford?

A Boeing 737 only costs about $100 million, but those 179 dead passengers and two surviving but damaged crew at Muan, insurance payouts will be much larger. There are over 1200 International Airports in the World...... $1million on each adds up to $1.2 billion, so we really do need low cost, low annual maintenance, ideas....

(2040GMT:) Maintenance cost may be a big Problem - a net could be made from a long life plastic, but it needs to behave a bit like elastic, and thus I think of the chains that hold a ship back from a rapid big wave creating launch into the water. The maintenance part is rewinding the necessarily heavy chain (for it needs big enough inertia) back to its waiting position, making sure it is free to move on the next impact if any, making sure it is thus kept weed/corrosion free.......

but it needs to move very rapidly at first because of the high speed of the aircraft, and slow it down at, say, about 3G (?). From 130kts say, this would be a stop distance of 76m (250 ft). Or 100kts = 45m (148 ft), 70kts = 22m (73 ft). This is not going to be possible at 3G, and Navy Pilots have to accept Far More than a 3G decel..... The USA Navy use long hydraulic cylinders to slow the arrestor wire, but they are expensive and only worth it if you might go to war. Do the RAF actually provision it for their combat aircraft on land? - or just a mislead story....

I have changed two words in my 1240GMT text immediately below - Clearly becomes "if", and should becomes "could" in the 1st line.

2jan2025 1240GMT If every airport could have an aircraft restraint at the end of the runway to allow for "no braking" (as in Muan airport crash) like some RAF stations have a/c carrier landing restraints/nets - but an airliner will be bigger and heavier, so cost effective design needed - and on-aircraft hook to catch the wire as on Tornado? (added at 1430GMT) - low mass big tube passenger aircraft structure, limited strength AND in any case, way too expensive. How much deceleration needed - are aircraft nose designs able to take a strong deceleration by a net (1500GMT)? Formula 1 uses deepish sand, so is more of an option..... but a smooth belly would take a lengthy deceleration distance!

However, Grass was good enough for the Boeing 777 crash at Heathrow on 17jan2008 - the crash initial impact point was about 340m from runway (AAIB report 1-2010, fig 14 below), so grass was enough to slow the Boeing 777 because it stopped at the runway end, but it did have wheels down and they dug in, leaving big track marks in the grass (AAIB report 1-2010, fig1 below) - nobody died, and the deceleration rate was about 0.7G.

Without wheels down, as in Muan, the slide would have been longer (and, in the reverse landing direction .....) that Boeing 737 could have breached the Heathrow perimeter fence (runway tarmac friction additive at Muan, but ... quantify). What lengths of Safety to the perimeter are Formally Required at Airports? (Added at 1650GMT) :

02jan2025 1650GMT: Aircraft will not always slide precisely along the runway, but some angle off it, like Tornado P03 did once, and thus any structure location must allow for this too.

Note also - The Muan airport crash on 29dec2924 may have been due to double engine bird strike - thus there would be no reverse thrust possible either, so it would have been the longest ever belly slide too.

EASA notified at 1242GMT 2jan2025 - their ID #205201 and at 1701GMT 2jan2025, their ID #205203

I have not heard what type of bird Muan Airport warned the Pilot of HL8088 7C2216 about on 29dec2024.

31dec2024 2020GMT, extra help to explain:

I think there was no undercarriage problem, for on approach to Muan airport, the Pilot would have selected U/C DOWN in preparation for landing, and if he had a problem he would have told the tower at the Muan airport immediately, to arrange fire and ambulance crew.

But then he was warned about many birds, so decided to go around hoping to avoid them, and thus lifted the U/C, to stow it inside the aircraft and reduce drag for the go-around.

However, the sudden drop to the ground seems unexpected and so the Pilot did not have time to lower the U/C.... and so the aircraft skidded a long way with NO braking available.

I am very sorry for you ALL......

31dec2024 1750 GMT - not much thinking going on. ITV News at 1740 GMT, just reported that undercarriage was the fault.

Nonsense - if so, then some minutes before landing Pilot would have flagged the problem to the airport, so clearly the u/c was working. Then Pilot decided to go around, so selected u/c up, and had no chance to lower it when the aircraft suddenly dropped - because both engines were heavily birdstruck? and lost loads of thrust..... Hudson Bay crash years ago in USA was due to Geese - strikes on both engines - big birds those!

30dec2024 1200 GMT as typed then: Could be a bird strike just as Pilot was going to abort landing and go around for another attempt, but aircraft dropped and yawed unexpectedly ?, so could be Pilot did not select undercarriage down while coping with control of aircraft. Note that the Pilot had probably just selected undercarriage UP, for the go around. The many Deaths were caused by aircraft hitting solid wall at end of runway.

Clearly we need crash recorder readout to know what Pilot was doing.....

A similar aircraft the next day (30dec2024) had to flight abort from Gimpo airport, so landed back at Gimpo, because of a "normally rare" undercarriage problem (it did not stow inside the aircraft after takeoff as expected?) - likely unrelated, but checks/maintenance for That Aircraft would naturally follow.

Nevertheless, a Politician ordered the whole fleet be checked for undercarriage problems - waste of time and money for Muan crash may be "a no blame of pilot in circumstances" not undercarriage failure, and the last flights of all these other aircraft were clearly quite normal anyway and their maintenance would have been done at the declared and agreed periodicity for this older type of aircraft, so Priority was Muan crash recorder readout quickly......

and any inspection for an undercarriage failure possibility, really needs to know what they should be looking for, from the Muan crash failure - if any.

What maintenance record does the crash aircraft have for its undercarriage?

Jim 30 dec2024

31dec2024 0700GMT: I was at Warton when P08, below, crashed into the Irish Sea and we lost Russ Pengelly and John Gray, Pilot and Nav. I went to Russ's Service on 5july1979. The TurboUnion RB199 engine team at Warton had to collect all of their records together to give to the Government REO for review - this included the installation ground runs data from both engines of course.

So will Jeju Airlines Records for the 29dec2024 Muan crash Boeing of course.

Jim Quinn BSc CEng FIMechE CPD

Tornado Concept and Engine Design Engineer 1967 to 1988

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