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About john.r.davies

  • Birthday 04/01/1947

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  • Location
    Lancaster UK
  • Cars Owned:
    Race Vitesse (last in UK), Citroen C5 Tourer, GT40 kit car in construction, Peuegot 208 GTE, Transit Mk6 race truck

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  1. Sad story. Legendary story that Colin Chapman fitted one of his early cars with a cardboard firewall. Challenged that it should be metal, he pointed out that he had used aluminium paint on it, "And as far as I know, aluminium is a metal." John
  2. It's on TODAY, and its being live streamed. courtesy of MotorSport magazine, NOW, at https://www.motorsportmagazine.com/articles/historic-racing/live-stream-2022-monaco-historic-grand-prix-watch-saturday-qualifying?utm_campaign=2212398_ED_F1 - 150522 - Monaco Historique&utm_medium=email&utm_source=emailCampaign&dm_i=4DIP,1BF3I,49SMYJ,62ZQK,1 Enjoy! John
  3. PS Just checked my own and weighed the wrench itself. 2.5lbs, so you can add that to the test weight, or IMHO ignore it.
  4. I didn't understand Ralph's "grip the square in the vice with the handle horizontal so that the weight of the handle does not affect the readings," unless 'horizontal' meant "vertical"! In which case, a spring balance would be necessary to exert a measured torque on the wrench. But IMHO the weight of the handle is trivial. John
  5. The FIA does approve, as at its F1 Commission meeting in London yesterday, the use of helmet cameras had unanimous approval, and all drivers will use them in 2023. John
  6. Ralph, Rather than a spring balance to check the wrench, why not use a actual mass? Sure, you need to measure the mass weight using another fallible machine, but once done, maybe checked on several scales, you know what it weighs, and can use it again. I have an old flywheel, over 20lbs, that I hang on my torque wrench to check it. That mass won't change! John
  7. I concur with Deggers ! Learn something every day (Socrates, or someone)
  8. I may have told before, oh working in an MG dealer at that time. The apprentices ( it was that long ago) and I were rounded up and bussed to Oxford to deal with a whole compound of Bs that had been flooded. In sewage. We stripped out the internal trim, the engines were turned over with the plugs out to expel the water - and they went back to the factory to be retrimmed!!! Anyone ever had a B that smelt of ShOneT in wet weather? John
  9. If you watch F1, you may have seen views from inside the drivers helmet! I presume built into the lining, so the above isn't a problem, although to have a device just there might cause injury if struck on that side. I hope FIA approved!
  10. For motorsport, a shoulder mounted camera is a BAD idea! You want to be able to get out as quickly as possible, or to be rescued, ditto, and that large impediment between neck and shoulder will make removing the safety harness much slower. Many police officers today wear a 'bodycam', but they are much less obtrusive, and mounted by a docking clip (like the radio on the other side) on a close fitting HiViz vest, so that the devices may be pulled off if necessary. And, they are using lap and diagonal seat belts, not full harness. Likewise, suction mounts are NOT permitted for
  11. Tom, That's not an in-service service, that's the initial post-build service. If your head nuts loosen after that something is wrong! As it is if the threads get oiled in use. Apart from the above, there is no need to re-torque head nuts, ever. Suspension bolts are a different fish of kettles.
  12. Where does it say in any car's service schedule that the cylinder head nut torque should be checked? Yes, 200-500 miles after rebuilding, but not for service in use. John
  13. Just seen a video from the USA of someone who had lined the back of their pick up with plastic , driven to the 'gas station' and filled the back up with petrol! No fire, remarkably. (The woman who uses 'dude' all the time is almost as inflammatory!)
  14. Or, the smaller Israeli numbers! (Of people in the studies) The smaller the difference between the control and experimental groups, the more in those groups is required to show a significant result. Or, the greater is the potential error, and the Standard Deviation! John
  15. No study can be perfect. The investigators discussed the seasonal variation, see at 14 minutes in. They removed anyone who took supplements and Lo! the difference disappears! But consider those results. "Secondary Outcome", the numbers that developed a real SARS-Covid infection. (6 minutes in) The calculated "P" for those numbers was 0.5. To apply statistics, it is assumed that the two factors being tested are not connected. If P is 1, then it is certain that they are nothing to do with each other. To be sure that they are connected, then P must be 0.05 or less, ne
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