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About jonesthenuke

  • Birthday 01/31/1957

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    Gardner 3LW
  • Occupation
    Engineer (retired)
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  1. Hmm, so all those modern super quiet, super efficient submarine propellors are built to an 1830s design?🤣 Better tell the navy.
  2. The team are based in Stewponey, my guess is that they were working in Stourbridge, or more likely Kidderminster given the number of trolleys.
  3. The CRT workshop at Bradley had a line of new ones last time I was there, however I understand they very rarely fit new ones so turnover will be low. Worth asking them if they have any scrap ones.
  4. The Vetus thruster is basically a starter motor (made by Bosch IIRC) with a changeover contactor strapped on the side (made by Albright). Any vehicle electrical equipment repair company should be able to repair the motor if you tell them its a Bosch starter motor. The bearings should be replaced, these will be standard items available form many suppliers at low cost. For the contactor it may be better to buy a new one, you can purchase from Albright or they occasionally come up on auction sites. I would advise against Vetus spares as the prices are ridiculous. The battery will need replacing and I would replace the isolator and probably the cables (if they look corroded) as long term they will suffer from the immersion. The Albright contactor (on our thruster) is an Albright International Ltd DC182, there are details on the Albright website, they are too large to upload here. The motor brushes are available on Ebay for a fraction of the Vetus price.
  5. Also if the oil is very thin (diesel in the oil) ?
  6. I would not use that valve it's a spring loaded one with plastic Internals(probably) look for a swing check valve, with a flap. I doubt you will find one with compression connections, they are usually screwed ends. Try BES ltd
  7. I have a vacuum extractor similar to the Selaet one above, but an Ebay version. Its excellent for draining bilges, engine coolant etc etc.
  8. On the Severn below Lincombe lock there are still signs of what looks like petroleum unloading facilities on the bank and an aerial view shows faint circular outlines in the field above indicating buried tanks. I assume this was part of the original system? https://goo.gl/maps/HYY2EbG1UzvFqhqh6
  9. Excellent, never seen that film before. I used to work at Dungeness and the pipeline buildings still exist, though they have long been houses.
  10. I should have added that the resins are regenerated by treating with strong acid for the cation and strong alkali for the anion. At work we used sulphuric acid and sodium hydroxide and had large tanks of each. Quite nasty stuff to deal with as you can imagine.
  11. Agreed but definitely made to last - like the engines.
  12. Reading the posts above, whilst it's reasonable to be sceptical about removing ions from water at low temperature with resin balls (it sounds so simple) it is actually how demineralised water is made. There are two basic sorts of the resin, cation and anion. One removes the cations (think metals like sodium and calcium and exchanges the ions for hydrogen ions (H). The anion resin exchanges anions for Hydroxyl ions (OH), the resultant mix of H and OH ions combines to give pure water H2O in place of the original contaminants In industrial scale plants the process is usually done in three stages with vessels of Cation resin, then Anion resin followed by a "mixed bed" to polish the water to get the best purity. Domestic scale applications are the filter cartridges for boiling water taps (which would scale up and fail quickly - ours did when I omitted to keep up with the maintenance) and larger carriages used to treat the water used to clean windows with long pole mounted brushes (to prevent smears on the glass when the water dries). The are mini mixed beds, often with an added carbon filter to remove organics. For more details look up "ion exchange water demineralisation plant" or similar. Note there are other processes like reverse osmosis (often used for pre treatment of the feed water, but this does not give pure water as a result.
  13. So EllaGlssp can we see photos of the engine and gearbox as you have raised our interest ?????
  14. I think you will find your forward/reverse control was made by Gardner, the logo looks like it is L and G for "L Gardner and Sons Ltd. Norris and Henty Ltd". I am no expert on these units but I believe they operate using oil as a hydraulic fluid. Can you post pictures of the engine and gearbox? It may well be a Gardner 3UC gearbox (quite large and heavy) Update, here is a picture from the Facebook Gardner Oil Engines group.
  15. The water treatment company was Permutit; they were a big supplier of water treatment plant to power stations. Where I worked we had multiple batteries at voltage levels of 50, 110, 240 and 500 V all made of lead acid cells. The 500V batteries could supply several hundred kW for 30 minutes or so. The 2V cells for the 500V battery were about the size of a wheelie bin, only half the height. All these batteries were topped up with deionised water, which if made with care, is purer than distilled water (so pure the main alternator windings were cooled with deionised water passing through the hollow conductors which operated at 23500V). We made our water on site and thus we were in control of the quality. The plant was large, for boiler feed water we treated circa 500kg/2 to a high level of purity. I would have no qualms using deionised or distilled water for lead acid batteries, however, you are subject to the quality of the supplied product, whether it's deionised or distilled.
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