john.r.davies
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Posts posted by john.r.davies
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Thank you, Peter. I know you well enough to respect your scientific background. But it is unfortunate that the first lines of your draft quote "catholic clerics, physical mediums, and poltergeists" as evidence for the hypothesis, stripping it of all confidence.
Such charlatans have been discredited by, among many, James Randi who is himself a professional magician. If a few examples escape that condemnation, so do the Standard Models of sub-atomic and universal structure, both of which cannot explain fully what is observed. Quantum Theory is one of the best tested in all science, but it cannot account for gravity, for which no 'graviton', the energy transmitting particle, has never been demomstrated.
In seeking explanation of the structure of the Universe, the Many Worlds theory does suggest that other universes exist alongside our own, "juxtaworlds" if you like. I would suggest that your hypothesis should be directed towards the interpretation of Richard Feynman and his successors.
John
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Of course Blaine uses a 'trick' - he's a magician. If I knew how he did it, I wouldn't explain, becaue that spoils the pleasure of 'magic', but if that trick were as mundane as inserting a video clip, where the crane hoisting him isn't seen, why are his audience amazed and surprised? Or, are they all actors?
They cannot be actors. Magicians perform their magic in front of paying audiences, who would storm the stage is something as crude as you suggest is shown them! Much stage magic is as amazing to the audience as anything that might be described as "paranormal", but if the 'trick' is explained the viewers are always disappointed, because it is clever, but so mundane, which why magicians never do explain! But the 'trick' NEVER involves paranormal powers or extraterrestrials!
John
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David Blaine can levitate.
David Blaine is a magician.
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My race truck, the TRansit, is liveried up with ""Silverback Racing" signs that are magnetic. Easy to apply on a flat surface but maybe not if it were curved or profiled. And they do not fall.off!
John
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Thank you, Ian! I had seen either format, and never understood the difference!
John
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Yes, Bob, I fell for that the first time, and it took a session with Cr*pCleaner to get the worm out!
This time, Norton, MalwareBytes and Cr*pcleaner have found nothing untoward in my desktop. So the data breach must have been online, the gods know where.
Jhn
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NO! Those messages were sent from my account by the scammers, who also arranged for any replies to be sent to them, so that they would have a new crop of valid emails to prey on. They are NOT safe!
In a scamming email, the style described by alfrom is spot on, plus "Please contact me - I need to chat" or similar in a pathetic tone, are standard scamming scripts. DELETE THEM! Do NOT reply!
I'm so sorry that so many friends have been disturbed by this episode. The happy aspect of this whole sorry affair is the number of friends who have contacted me, to ask if I'm OK, even neighbours popping round to knock on my door. In a world where low lives do this sort of thing , it's good know that there are so many caring humans about!Thank you all!
John
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I have no idea Roger! Nothing personal, certainly.
Andy,
I felt like that about BT, I was cursing them up and down, but a computerwise friend tells me that almost certainly the scammers got my details from me! Then they could go to BT and 'be' me to change the records.
John
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All. BE AFRAID, BE VERY AFRAID!
I am the victim of a hacking exploit. The scammers got into my account at BT, changed the email address as Jochem found, and the recorded mobile phone number, so that I couldn't get in to reset my password. Clever. Then they se the account to send out the messages as others have received and to forward all received messages to them. SCary!
The BT Email Team (NOT the webpage support team who know nothing) sorted it, and I'm back online. But it has buggered up Facebook for me (no bad thing) and other message boards, and I still have the task of changing ALL my passwords!
If you do get one of these, from 'John' or anyone else, DO NOT RESPOND! DO NOT CLICK ON ANY LINK! If you want , contact the apparent sender by another route. Jochem and anyone else who did respond, check your PC, run the fiercest cleaner your can, and CHANGE ALL YOUR PASSWORDS!
John
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Peter, I thought that the Zinc was just a convenient atom and ion to balance the phosphate, which was what the oil - and the surfaces it protects - needs?
Shouldn't we discuss phosphate content, rather than zinc?
John
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60 inch primaries? Certainly, Sir!
That's one of Gareth Thomas', but as he never promoted it I suppose it wasn't that succesful.
John
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Thank you! What an excellent review that adds to the conditions that may cause glare, and which a simple eye examination may exclude.
Delighted that despite your family history, glaucoma has been excluded! The same exmination will.reveal early cataract, which I have been nformed of too! But too early for any rational treatment.
John
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The popularity of these 'antiglare' glasses is worrying. As I mentioned earlier in this debate, 'glare' is a symptom of the eye condition 'glaucoma', which is mainly related to age.
In a population whose average age is increasing, more people will suffer from glaucoma. But over and above that factor, the incidence of glaucoma is increasing. (Alan P Rotchford AP, Hughes J, AgarwalPK and Thatham A, Prevalence of treatment with glaucoma medication in Scotland, 2010–2017, British Journal of Opthalmology, 104(3), 381-5, 2020 )
Glaucoma is associated with blindness, is easily and painlessly detected and is readily treated. I urged before and do so again that anyone finding that headlights cause uncomfortable and disorientating glare should consult an optician before buying a set of fancy yellow glasses!
John
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Surely there can be no argument that an extractor manifold MUST have equal length primaries. Thermal variation can only influence their length.
Anyway, "No doubt those designing F1 engines and the like may well have the computer modelling to test their designs but that wasn't available back in the day." They certainly do, and I give you, Cordon D., Dean C., Steciak J., Beyerlein S, "ONE-DIMENSIONAL ENGINE MODELING AND VALIDATION USING RICARDO WAVE"
"Ricardo WAVE" is just as suggested a system to model engines' internal function. Cordon et al derived this chart:
I've no details of the engine modelled (the paper is behind a pay wall) but note the deep trough at 6K, except with 40 inch (!!!) primaries. So clearly SOME effect!
And modern BMWs go the same 6-3-1 extent:
JOhn
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I didn't know that the University Boat Race was as early as 1858:
Visual comment on "The Great Stink" from Punch, 10/7/1858, "The Silent Highwayman "
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The things people want to bath in. Visited the London Museum Docklands just before last Christmas, and right outside in one of the old docks was this, or one like it:
Not my photo, obviously, it was dull and drizzling when I was there but people were out in these heated spa pool floating baths, in cossies, "enjoying" drinks and nibbles.
John
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Thank you, Peter! Another factoid to store away!
John
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TriumphTune described the TT1200 as an "Extractor" manifold, but classified it as "Road" type. It collects the front three and back three cylinder primaries into two tail pipes, so cannot work in the same way as I described above. They also did a long primary "Competition" version, FS1230 (why not a TT designation?) while their TT1240 was a true 6-3-1 extractor.
JOhn
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There seems to be some misunderstanding above about how an "extractor" manifold works!
It relies on the nature of a six cylinder engine, which is two three-cylinder engines joined as mirror images of each other. An Extractor links the cylinders that fire just 360 degrees apart, as said above 6 & 1, 5&2, 4&3. The pulse of exhaust gases from one of the pair reaches the junction and is reflected up the other branch. If the length of the Primary is correct, then this reflected wave will reach the other port just as that opens, in the negative phase of the pulse wave. The negative pressure will promote extraction of exhaust gases, hence the name. This will happen best at a particular engine speed that depends on the primary length. The longer the primary, the lower the resonance speed, but really long primaries are for F1 and the birds.
As you would expect from the above, such interference is impossible with a four cylinder engine (or an V8), so I'm sorry, Andy, you won't see it at all with an MX5, or with TR4s. Yes, it would be good to see a strict comparison on the dyno, but AFAIK it's never been done, or never made public.
John
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You mean a 6-3-1 manifold? The criterion is the length of the primaries, which governs the rev range in which they resonate and act as extractors. Like organ pipes, the shorter the higher. Gareth Thomas, a strange man and an excellent engineer, recommends that they should be 0.43m long and exactly equal to work around top revs:
They need to be longer to work at mid range, but those would need to be bespoke and will take up a lot of space or have ground clearance problems.
John
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Yes, some time ago, after using araldite to mend a leak
I blocked the tube!
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Have you an infrared 'gun'? Not pricey. Scan that across the warmed up radiator ans look for blocked tubes that will be cooler.
John
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I have one that has two cigar outlets, and two USBs. You can have three outlets of each.
Or, one that has FIVE USBs!
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And the results were.....
As shown, there were a LOT of DNFs, including me, I'm sorry to say. A loud knock and loss of power led me to retire after only my second lap. Turns out that a bent push rod had caused another to go walkabout, hitting the rocker cover every other revolution!
Hope you're happy with your result, Roy. Given the conditions, wet, cold track, I was with my practice time. The forecast was right about "cold"!
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That's not window glass, it's hail!
John
Oil cooler
in TR4/4A Forum
Posted
The efficiency of a liquid-to-air cooler is a function of the area exposed to air flow, relative to the the volume of coolant. The surface area of a sump is trivial compared to the 6.25 litres of oil in it, so that covering it with a sump guard will have no effect.
That cars may have a sump guard AND an oil cooler is down to their use. Competition cars, especially rally cars, may need the first because of the ground they traverse, and the second because of the excess work over road use that the engine must do.
John