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About Batavia

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    Electrical Engineer
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  • Boat Location
    GU South

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  1. Metric rules

    5.5 mm is the standard size of an M3 nut. I think that when you get down to small metric sizes, steps of 1 mm for nut sizes are proportionally too large. Chris G
  2. MCB thingymajig

    Another point to note is that a 2 pole 100 Amp MCB would almost certainly be 3 modules wide, rather than 2 - I am not aware of any major supplier who makes a 2 pole, 2 module wide MCB rated at more than 63 Amps. Chris G
  3. J2 Stater motor

    These bronze ones are designed to be sacrificial. With the Bosch starter motors on 2 of my Bolinder 1052 engines, I have one with steel and one with bronze - and both types are still avaiable, so presumably a matter of choice - and of how much you value the teeth on the flywheel! Chris G
  4. Managed To Avoid A Nasty Accident Today

    As was the Texas City Refinery. A bit of a theme emerging here... Chris G (ex-BP)
  5. Like this? In Romania, I think. We opened a wooden door in the corner of a building and found this 10kV transformer sitting on the floor, with the switchgear which looked as though it was made from an old bedstead! All live. Chris G
  6. Work of Art!!! On flea bay

    Daedalus No. 2 doesn't have a 1052 - but I do have 4 x 1052s and 5 x gearboxes in various states of (dis)repair. One of these will be replacing the one in Batavia some time soon, fitted with the gearbox that RLWP reconstructed for me. There is one in Sandbach and at least two more in boats whose names I can't remember! Chris G
  7. Windmill Bridge - Hanwell

    Firestone, I think! http://www.bhsproject.co.uk/photo_gwrfirestone_py.shtml Chris G
  8. Mains cabling questions

    Certainly when you get to interesting stuff - 3 core 240 mm2 motors cables, 630 mm2 transformer tails, etc. are more like pipe fitting than electrical work! Chris G
  9. Mains cabling questions

    Julian, I vehemently disagree - SY is infinitely worse than SWA cable! Chris G
  10. Soft start for shore power

    That's one way of doing it, but a better approach is to install an MCB that can handle the transformer's inrush current - typically a Type C or Type D. Chris G
  11. As you have pointed out, it should be simple to walk between the lock and the station, as you can see one from the other - but I don't think that there is any route you can take that avoids having to walk along some part of the B488 (which I assume is the busy road you mentioned). Even if you go off footpaths, you come across drainage ditches and fences that are difficult to cross, with added livestock problems. I haven't had problems with cows in this area, but it is a few years since I have been on the paths to the south of Horton village. The route which includes the least hazardous/shortest section of road involves going along the bridleway that runs to the west of the railway line. You get to it by walking straight on at the southerly right angle road bend in Horton village, where the bridleway goes off under the railway. However, at the Cheddington end you have to walk back to the station from the nearest point of escape, which is between the houses on Cheddington Road. This is certainly not the shortest route. Chris G
  12. "Homework" Help needed

    That's 'cos it is comutative! Chris G
  13. Another strong recommendation for Roger - he has been doing ours since the BSS came into being. Chris G
  14. Engine Rooms..

    And you can inhale the particulate material from the exhaust all day long without having to bend over the stern! Chris G (about to modify Batavia's exhaust system so that it can either come out of the cabin roof or the stern of the boat, due to fed-up-ness with the clods of soot - although the impending engine swap might ease things somewhat)
  15. We had this problem on Batavia (which sits very low in the water), and solved it using a Whale Gulper pump. This works fine, with a few provisos: It is probably best to have the pump below the level of the bottom of the sink - ours is about 300 mm below the sink. Have a length of hose (about 1.2 metres in our case) before the pump, so that if some idiot pours a small amount of boiling water down the sink, it doesn't immediately reach the pump. Having said that, we haven't had any problems with draining pans of vegetables, etc. Ensure that the waste from the sink to the pump has a high level vented connection - e.g. the sink's overflow. A friend had a sink (with no overflow) which used a Gulper pump and all was well until someone ran the pump with the plug in the sink. The pump pulled the plug well and truly home and much dismantling had to be done to remove the plug. In any case, you don't really need a plug, as once the hose to the pump is full of water, the sink won't drain until you run the pump. Chris G