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openspaceman

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Everything posted by openspaceman

  1. They mostly seem rated as 2000W constant with a much higher peak for a few seconds, presumably because it;s the semiconductors dissipating heat that's the limiting factor. If you charge from a modern vehicle with an "intelligent" alternator that is controlled by the vehicle ECU it will need a bit more than hooking it up via a simple split charger, a DC to DC charger may be required. Be aware that, ignoring conversion losses, at 1kW you will be drawing 83A from a 12V battery so the cable and connections will need to be good to avoid heating up, one reason I would go with 48V unless charging from a vehicle was required.
  2. William Clark & Son LTD Richard Gordon [email protected] are cranab dealers but I got 4510 diagrams by contacting cranab direct.
  3. It's interesting how things have progressed since the beginning of this thread; back in the days I was contracting I used to run a 13hp 200A welding genset with it's 4kVA 240V windings. My wife and I could just about lift it into the Land Rover. Last month I had some site welding to do so I took my 200A inverter welder and a 5kW portable power station(30kg) with 3kWh 48V battery(38kg) and welded for about 30 minutes, I still had 70% capacity when I finished. It ran my 2kW compressor at home which the 4kVA generator struggled to start. I had to return the power station under warranty ( after 2 inverters failed to power up) and if I do it again it will be using a more modular approach but I think I will stick with a 48V domestic battery.
  4. but for the TPO I would agree
  5. That looks like old mechanical damage which has been exploited by a bug, possibly exacerbated by a woodpecker after insects. Which country?
  6. They just look desiccated to me,has anything been at the roots?
  7. The lesson these pictures teach me is never trust what you see in a digital photo
  8. You may do it at any time as long as you are not disturbing nesting birds. The chances of a nest in a cherry tree are low but an inspection will ascertain that. Hedges tend to be a bit more of a problem to investigate.
  9. I don't know what EA lidar data is available now but over ten years ago I downloaded some to look at the old workings and three barrows on the local heath. It seemed to be aimed at determining local flood risk. At the time, on my non cutting edge Pentium PC it took ages to render an image. The data had already been processed to show the longest reflection,so tops of trees were filtered out, and only the ground surface was shown.
  10. Galvanising is a sacrificial thin coat of zinc stuck on the iron and it corrodes preferentially, so it gradually gets thinner but because of the electrolytic effect it protects the iron from rusting, once the zinc corrodes away the remaining iron starts rusting. Once it gets to that stage paint is a protection for the sheet.
  11. Sounds like the carburetor float isn't floating
  12. Gluten hold the CO2 bubbles in.
  13. Any amount of rye seems to stop the bread from rising. I still have a few kilos to grind from a bucketful a farmer gave me but the wife doesn't like to use it.
  14. I think @bmp01 took one apart and repaired it.
  15. branches ring barked by grey squrrel? I'm seeing a lot of it this year, damage happens in July but withering becomes conspicuous as the leave go brown now. Interestingly the young 6m tall ash I have grown from seed, as a dieback experiment (I prune out affected branches as soon as I see them), showed some symptoms of ring barked branches. Closer inspection showed it started at crotches, just as with squirrel, but I have seen no squirrel and the gnaw marks were too small. It was a bit of a mystery until I noticed a few hornets visiting yesterday and stripping, presumably for the sap.
  16. I hope they remember what happened to French and German armies that over extended themselves into Russia.
  17. Good story @Billhook However it doesn't look like @Lorraine Higgs has been back so far this month, we do know she has some mature chestnut of coppice origin in Kent.
  18. I had their hydratongs on the back of a Holder A55, still have the Holder but when I last went to look for the tongs they had disappeared.
  19. two separate oaks about half km apart, one 30cm limb each
  20. I hadn't noticed the phenomenon this summer until today walking along a towpath where there was evidence of a couple of large oak limbs having fallen in full leaf, Obviously the leaves add weight, and hence leverage, but I wonder if the lignin becoming more plastic in the heat exacerbates the strain.
  21. We'll be finding out sooner than most and only we could get a surprise, I've been wrong before.
  22. That's right for most lithium nickel manganese cobalt ones used in power tools, these are the ones that catch fire if you abuse them but still have the best energy to weight. With seasonal use tools it's necessary to store them charged and recharge them after 6 months else the cells get low and the charger will not recharge them. I had a hedge cutter come in to the repair cafe that was flat and would not accept a charge from its charger. I managed to charge each of the 10 cells individually to 4.16V and it worked again plus could be recharged, which was lucky as the battery is now obsolete (same make as Titan).
  23. kaowool or cerablanket, it can be fixed on with a proprietary waterglass based glue but Holts gungum exhaust paste is similar. I think I may still have a part roll of it.

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