This is https://jim-quinn.blogspot.com/ News Stories
Latest Force at https://jim-quinn2.blogspot.com/ 18may2025
For RR SMR exports - see https://jim-quinn3.blogspot.com/ 14april2025
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
and https://jim-quinn51.blogspot.com/ The Great Depression
and https://jim-quinn6.blogspot.com/ Funding Poor Nations
and https://jim-quinn41.blogspot.com/ Charity Volunteer
Sorry about the font size changes - this Google blog software is lousy - no matter I correct to Medium size, I find a little later some of it has changed to enormous!!
28july2025
JimQ comment below
Quote from https://en.mercopress.com/2025/07/28
The Argentine government shipyard Company Tandanor has finished the flat cement foundation on which the Joint Antarctic Command for the Ushuaia integrated naval base in Tierra del Fuego province is to be built, points out Buenos Aires media.
According to Argentine president Javier Milei statements back in April, and following visits from several top United States defense and naval officers, the project is part of a joint collaboration between Argentina and United States, which attempts to contain Chinese influence in the extreme South Atlantic and Antarctica.
The joint project allegedly also means the end of a similar operation, but financed by China, following on agreements with Beijing, to which former president Cristina Fernandez and her puppet successor Alberto Fernandez had secretly reached.
What has also surprised is the speed with which the foundations were built, given that in Tierra del Fuego province, during July, there is a ‘winter ban’ of all construction activities particularly when water and other liquid elements are involved in setting cement, given extreme cold temperatures.
Some nationalist groups are complaining that reaching an Antarctica agreement with the United States, details of which have not been made public, means Argentina is dropping its “Antarctica sovereignty ambition”. They are also accusing the US of intent in using the integrated naval base as a calling point for US nuclear submarine.
Allegedly the head of the US Southern Command Admiral Alvin Holsey visited the construction site and underlined how significant it was for the US to expand its geo-strategic influence in the Antarctic continent, ”disputing the presence of other powers, which have ambitions in the area”.END Quote
JimQ comment:
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15july2025 update
Air India Crash 12june2025, report from
"Government of India Ministry of Civil Aviation Aircraft Accident Investigation Bureau
Preliminary Report Accident involving Air India’s B787-8 aircraft bearing registration VT-ANB at Ahmedabad on 12 June 2025"
One important note - this is the first hull loss of the B787-8 aircraft, but there might be other switch incidents on this or other Boeing's......?
Always look for component risk and repeatability, before accepting pilot error! Keep chasing the design please chaps!
17july2025 addition:
16july2025 addition:
10pm addition - is there any SOC related satellite signal here for the Home Base Maintenance Team?, to plan for touchdown or later. Does it confirm EAFR recording times? I presume the actual SOC position is recorded as well as the fuel control switch demand - any cockpit display?
Back to Air India VT-ANB: Extra thoughts/questions - chasing the Hardware still, rather than the Pilots actions.
All 787-8 Pilots will surely see a wiring diagram of the aircraft to study and understand, but they will probably not have seen the actual wiring harness diagram itself as it runs within the aircraft, and that is what I now question. See my TBT 19-pin amp photo above - there is a permanently wire separated "harness" in the brown plastic, but there are loose wires too (thin for this low current device!).
14/15july2025 Sidestep!
1) Microsoft Windows 10 software is poor, for while my fingers fly over the keyboard, suddenly the file being created aborts, without cause as I see it!! Probably, geeks like keyboards, and replace mouse operation with ...... some keys!
2) My Samsung mobile phone comes up with different displays depending upon what my finger seem unknowingly to trigger when trying to receive a phone call!
3) Google Blogspot keeps changing the font size at any time it pleases!
4) The Chinook HC2 software too, as in the Isle of Mull crash that killed 29 people in 1994, which had technical problems with the specific airframe involved in the weeks leading up to the crash. Pre crash, British Auditors with Software Analysing Software, said that Britain's MoD should not have bought that Textron software.
5) All of these were like "Random" Risky Results thro' time/use - slightly different triggers giving rise to obvious or not, faults - "Dirty" Software in all of these cases !
Similarly,
we must Audit the technical risk probabilities within the Design of those 787-8 Fuel Control Switches .......
In 2018 the US FAA issued Special Airworthiness Information Bulletin (SAIB), NM-18-33, on potential problems with Fuel Control Switch locking mechanisms on Boeing aircraft, first discovered on Boeing 737's.
This was not even a MANDATORY check from the FAA it appears, for such a significant Safety issue (as I describe above). It should now be MADE Mandatory of course.....
AND, if that/those Fuel Control Switch/es had been a problem on other flights, it would have not resulted in a crash if it occurred at altitude (just a little higher, and then the engines would recover, to OK......).
Poor or only-slightly risky designs can give rise to apparently only occasional, but fundamental problems, so we must Audit the technical risk probabilities within the Design of those Fuel Control Switches
(how much resistance to movement of the latch, how is the latch locked, what are the machining tolerances of the latch and thus their effect on repeatability and predictability on every aircraft, what vibration and reliability testing has been done, and then repeat for the switch itself including with the electrical wiring underneath, does the harness there pull on the switch).
So,
how many Pilot or Ground Crew problems with the same switch have
there been (perhaps, not always?) noted on All Boeing Aircraft, over
the last five years say?
With such a small amount of rocking motion, what sort of electrical connections lie hidden underneath the panel? Are they duplicated? Two positive and two negative connecting wires? Plus instrumentation for the EAFR? And Earth bonding? - getting a bit crowded under there with such very small movement!....and small switch.
On Tornado, the latch has to be pushed, and then the throttle pulled back to HPSOC from Idle. There is also an LP cock for reheat servo fuel - a red cover has to be lifted and then the LPSOC selected shut.
Both are Two step actions, not as Boeing 787-8? Not clear from the VT-ANB Report.
Jim 15july2025
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12 June 2025 at 21:42 From Jim Quinn
To: moked@mail.gov.il .il is Israel
Dear Danny Danon, and B Netanyahu, and President Isaac Herzog,
I saw Danny's address at the UNGA just now on TRT World HD (from Turkey on Sky channel 513) - Danny goes back to October 2023 and No Recognition of Israeli havoc since then, which I describe below:
0) on 7october2023 Hamas killed 1250 Israeli and captures 100 hostages. Israel over exaggerates the problem, and kills and injures Palestinians in abundance, without thinking how to recover the hostages. See graph attached.
1) By 1st January 2024, 20,000 Palestinians had died. Israel wants hostages back, but says killing will release them .....
2) By 1st March 2025, 30,000 Palestinians had died.
Israel wants hostages back, and I told the Worlds Media that if a ceasefire had been agreed then, that the hostages would have been released within a month or so, for Hamas would see that Israel was prepared to passively talk with Hamas on how to release the Hostages.
Israel wants hostages back, but says killing will release them.....
3) By 1st August 2024, 40,000 Palestinians had died.
Israel wants hostages back, but says killing will release them.....
4) By 12june2025, 54,500 Palestinians had died.
Israel wants hostages back, but says killing will release them.....
Suggestion:
Dear President Isaac Herzog,
You surely can see a pattern here - you keep killing and injuring so many, that Hamas becomes ever more upset that you are so very aggressively attacking adults and children..... so you do not recover the hostages.
The more Israel kills and injures Palestinians, the less likely the hostages will be released.....
Can you see that now that I have painted a longer term picture of events since 2023. Your very killing of Palestinians is leading to no compliance from Hamas....., but still you kill.
The Vietcong said many times, the village you Americans attack, will cause ten more to rise up against you. And the Vietcong beat the USA, as you will know.
Read it which ever way you like - your 43.6 times dead (54,500 divided by1,250) is a huge over reaction, and on the other side, Hamas is digging its heels in too, for You Will Not STOP.
I merely ask that YOU reconsider this history - and change tack, learn to observe.... TRUST
(it would not have taken long to see if it worked would it!! just a month or two..... if it worked and shorter if it did not!)
by stopping your killing and injuring of Palestinians.
That way, given my above dates as triggers to stop, you would possibly have had your Israeli hostages back in about March, or October, or .....how about July or August if you stop TODAY?
Sorry, but it is you that do not think nor question your attacks - is this working? you should have been asking.
From about March 2024!!
Such a simple question over a year ago, so that I now consider you.... Stupid, for being unable to take such an overview, and so easily probably RECOVER your People held as hostage within a month or two of peaceful negotiation.
Even one month extra to my two, makes your actions..... mentally retarded from about April 2024.
Yours sincerely
JimQ The World Carer
Jim Quinn BSc(1965) CEng(1985) FIMechE(1994) CPD Human Failures(2024)
https://jim-quinn0.blogspot.com/ Ability
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Updated 1650 BST 18may2025:
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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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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
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:
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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
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.
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.
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/
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
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- 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.
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.
