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Member postings for Cornish Jack

Here is a list of all the postings Cornish Jack has made in our forums. Click on a thread name to jump to the thread.

Thread: Aircraft General Discussion
08/03/2019 11:28:46

Just come across this - https://www.abc.net.au/news/2019-03-08/nasa-captures-incredible-images-of-supersonic-shockwaves-intera/10882590

Don't understand the technical significance but VERY impressive images!

rgds

Bill

Thread: Plastic Balls in Bearings?
26/02/2019 12:32:08

If you feel that you really have to pay that sort of silly money for a vacuum cleaner, go for real quality with a Sebo ... no, I don't have shares but I DO have two such and with HEPA filters they will certainly sort out the hairy dog problem - we have cats ... same sort of problem!

rgds

Bill

Thread: Rack operated tailstock
23/02/2019 18:03:14

Meunier is quite correct - I do have one (Cowells) fitted to my ML7. Excellent as compared to the handwheel and bought it to replace a basic 'home-brew', made because I was fed-up with the original.

rgds

Bill

Thread: New coffee maker - disgusting taste!
13/02/2019 23:26:34

Two possibilities which should work- Bodum glass tea pot , or, jf you want it to be a coffee -maker, use a Cona old-style percolator. I speak from personal experience with both. Both have the advantage that the tea leaves are completely separated from the liquid and the strength can be gauged from the colour. Slurp, slurp!!

rgds

Bill

Thread: "Vintage" CNC
10/02/2019 12:24:28

S O D Dave - your what-might-be-called "life's consequences" makes interesting reading - as, probably, would many of us. Coincidence, opportunity and decisions based thereon dictate our passage through life much more strongly than any conscious 'self-design'

rgds

Bill

Thread: Neil's Irrelevant Press Release Thread
08/02/2019 13:56:19

Such points are (IMO) best made by graffiti e,g. a poster in a hospital paediatric ward " The first 3 minutes of life are highly dangerous!!" to which had been added, freehand, " the last 3 are a bit tricky, too!!"

rgds

Bill

Thread: WHERE ARE THE SHAPER USERS ?
06/02/2019 11:22:54

Perfecto 7" powered version in a too-cold-to-work-in workshop!

rgds

Bill

Thread: Is it a drone?
04/02/2019 10:27:43

Brilliant, stunning, amazing plus any other superlatives you may care for!! The really telling part is towards the end of the video when a couple of real birds arrive to check out the 'opposition'. They, quite quickly, accept that it is just another bird and go off about their business. Years ago I used to slope soar model gliders near a rookery in the Andover area. As soon as I launched the rooks would come out to fight and made life as difficult as possible. The other point re. the ornithopter is the tolerances he must have worked to plus the design stress calculations - quite mind boggling and surely an enterprise that should get enthusiastic research support.

rgds

Bill

Thread: US/UK Lexicon
24/01/2019 11:58:46

Lack of precise instructions for aircraft engineers was involved in the reverse fitting of a helicopter tail rotor! The aircraft had been in service for over 10 years before the problem occured and the result was quite exciting!! A similar lack of specifics produced the failure to lubricate the main rotor head on the same type - even more exciting but, through pure luck, non-fatal.surprise Give me over-verbose instructions every time on aircraft, please ... and dedicated people who read and comply!!

rgds

Bill

Thread: Flying experience
20/01/2019 22:43:57

John D 1 - I can well understand the attraction of hang-gliding - described by some as the nearest you can get to flying like the birds. The tragedies you note are the other side of the coin and in the early days the easy access and lack of 'airmanship' was a recurring factor. It would seem that enthusiasm can still outweigh caution and commonsense ...

**LINK**

Might be worth him having a punt on the lottery!!

rgds

Bill

19/01/2019 18:57:32

Re. flying experience ... varied extensive and (most importantly), free! Joined at Cardington in 53, Swanton Morley training as Signaller during 54, then a total of 34 plus years, 6000 hours split 50/50 fixed wing/helo , operated in all crew positions except gunner, 2+ years Special Duties, completed Air Traffic controller course, test flying Boscombe Down, VC10 Sim console Op, then BA tech instructing (Tristar and 747 400) and Virgin 474. Signed off for full motion ops on all the sims plus demos on BAC 111 and 737-200.

That mish-mash plus having held Master Aircrew rank made my user name easy ... as in "of all trades" with acknowledgement of the complete version!!sad Best flying? unarguably 14+ years helo S&R - on line and instructing and the most satisfying piloting being the Whirlwind 10! - much the most difficult but much the most satisfying when you got it right!

15 years since last involvement - where does the time go?

rgds

Bill

19/01/2019 17:46:49

I watched the Andy Gough incident at Brize - tragic, obviously, but quite strange also. He arrived overhead on tow while the previous display was concluding. I was one of very few people to see it and the sequence was OK until the inverted downward portion, when he pushed then relaxed and pushed again. The second push removed the outer wing panels and he disappeared into the bomb dump. I haven't read the BoE report but if Martin's version is correct, it doesn't quite tie in with what I saw - certainly no aileron involvement.

rgds

Bill

Thread: Yet more confusion!
12/01/2019 14:53:03

As if Brexit wasn't enough of a problem ...**LINK**

Good excuse for the next time I get lost!!wink

rgds

Bill

Thread: Gatwick Drone 'Attack'
04/01/2019 13:43:16

S O D - " This wasn't an isolated incident: bribery, sabotage, bigamy, seduction, arms trafficking, destabilising governments, he did it all. "

NO change there, then !

rgds

Bill

Thread: Model engineers - enlisted in war efforts?
02/01/2019 20:50:03

Sfuart Turner it was. They made small combined boiler/engine packs which were small and light enough to be used for Special Forces and similar, to power radios in the field. etc. Pretty sure that ME had an article about them maybe 20/30 years back

rgds

Bill

Thread: Drill sharpener
27/12/2018 13:25:50

Mark P - I have a Drill Doctor. Used once when first purchased some 5 years or so, ago. Drill size , maybe 6 - 8 mm and results seemed OK but innate laziness has taken over since! blush

rgds

Bill

Thread: New Products from ARC
26/12/2018 15:14:13

The DRO price reduction offer on this forum settled my Xmas pressie this year and very impressive too! That left SWMBO to sort out. Happened to mention that I had seen a "Myrtle the Turtle" robot vacuum cleaner in Lidls and the response was immediate! Managed to get one and have just given it a trial run. At 83 it represents the best possible fun to be had with one's clothes on!! The final 'icing on the cake', so to speak, is pressing the remote control 'Home' button and it stops what it's doing and navigates back to and plugs itself into the charging point. Better than telly ... well almost anything is, over Xmas!

PS   the cats think its absolutely fascinating too!

rgds

Bill

Edited By Cornish Jack on 26/12/2018 15:15:22

Thread: Gatwick Drone 'Attack'
22/12/2018 16:58:54

"Surely the authorities are obliged to consider the possibility of malicious intent."

Indeed so, Michael. That possibility, I would suggest, should be based on experience of such things, which, in spite of them being freely available for some years plus the demonstrations of evil intent among the bad guys, has resulted in just how many incidents? Exactly zero - not that that has any guarantees for the future but it does indicate that hiring a van is more 'productive'. Who needs some head-banger, faith-quoting loonies to cause chaos and disruption, when we can self-generate the Gatwick episode?

rgds

Bill

22/12/2018 14:50:11

Ron - the aerodynamic effect is what you would see as the difference between , for example, a 'frisbee' and a pebble. Apart from the distribution of mass, the airflow effect on a 'flying' object is entirely different from that on an object travelling on a trajectory. If you then combine it with the airflow distribution over the AIRBORNE aircraft (not on the ground, static) the situation is entirely different from that depicted in the demo clip. Additionally, the indicated damage, while appearing severe, is, I would suggest, not structurally or life-threatening.

Examples of aerodynamic interference are readily seen in air-to-air refuelling - getting the probe into the drogue requires a VERY large amount of trim change and that is at some considerable separation.

Finally, as I pointed out earlier, the sheer difficulty of intentionally positioning the drone would tax the talents of the very best of remote controllers - for demo, try model aircraft formation flying.

rgds

Bill

22/12/2018 12:25:38

I have to disagree with the suggestions that ... a. a drone strike is likely or

b. that the damage shown in the clip previously has much validity.

The clip shows an object (drone?) being propelled at 200 mph at a static wing. The drone is not IN AERODYNAMIC condition and the wing is STATIC (no aerodynamic effect). That would, possibly, replicate a solid object impact result but totally ignores the airflow effects of BOTH drone and aircraft wing. It does not equate with a bird strike. IF and it is an ENORMOUS IF, any drone operator could manoeuvre the drone into aircraft proximity, the likelihood of a strike is minimal. Birds represent a hazard only because of their numbers and, therefore, the large total area presented. I would suggest that the whole episode response has been totally disproportionate and, unfortunately, typical of what has become the litigious 'snowflake' society!

rgds

Bill

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