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openspaceman

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  1. First heed @peatff and @Muddy42 as clamshell designs are a pain to work on. Second it's one thing repairing a saw you like but another with an unknown fault that's on offer but I'm a sucker for that. If you do take it on then establish what is wrong before looking for parts, dlastore.com was my source for meteor pistons but take a few days to arrive from Greece and always check the price of OEM first, L&S will get them even if on back order.
  2. I eat meat but don't like a lot on my plate as I prefer a lot of vegetables. I used to walk along Penclawdd beach in north Gower, it is entirely made up of sea shells and the shell fish catch must have been huge. At the same time a mate was doing his degree in marine biology and sampling shells, in the Tawe estuary, for their heavy metal content. At the time he reckoned the shells were getting within 10% of an ore grade worth refining. He also figured an increase of one part per million of lead in the sea had a dramatic negative affect on shell fish. The sea, like the fluid in our bodies, has to remain faintly alkaline, the more it gets toward neutral the less able crustaceans are to fix carbon to carbonate. The more CO2 dissolved in sea water the more carbonic acid. Surface waters are in equilibrium with the atmosphere with regard to carbon dioxide in the ratio 45:55.
  3. Sad news; I didn't know him well but we used to chat at shows. I had not realised he was that much older than I.
  4. No changes in 40 years years there then apart from the name.
  5. May be Larger eight-toothed European spruce bark beetle (Ips typographus) - Forest Research WWW.FORESTRESEARCH.GOV.UK Information about larger eight-toothed European spruce bark beetle (Ips typographus), a pest of spruce (Picea) trees and...
  6. If they are drawing water from aquifers faster than they recharge it is not sustainable either.
  7. We will definitely have to disagree about that where's @farmer rod? The issue is also about feeding cereals fit for human consumption to cattle
  8. The fallout from this form of intensive farming affects dairy and beef farming here as people erroneously attribute the same carbon and methane emissions to the, largely, grass fed cattle in UK when they try to persuade people to avoid beef and dairy products. Not to mention Rishi wants us to have hormone fed beef.
  9. Yes but as some heat is conducted through the refractory it then passes through the metal wall to heat the room. On the big industrial wood chip boilers that I worked on the initial off gassing stage was quite cool, about 500C, so as not to damage the feed system and grate ( exhaust gas recirculation was also used to keep things cool). The secondary combustion then took place in a highly insulated tube where all the offgas was burned out at high temperature and then this led to the boiler tubes. The exhaust was then sucked out at a few degrees over 100C. This burned chip at about 35% mc but we often received wetter.
  10. Difficult question; if the stove is properly designed and run then the exhaust should only be warm enough to carry the combustion products up the chimney without any vapours condensing out, if combustion is perfect there is only water vapour to condense. The main thing is that the flame should be able to burn out completely without impinging on any cold surfaces or meeting any cold draught, the heat exchange then takes place after this. This is why modern stoves are refractory lined. Perceived wisdom is that all the massflow should reach 800C and have a residence time of 1.5 seconds for clean combustion.
  11. I have not filled a boiler this way but the sand also conducts heat away from the fire and thus protects the metal from burning. You could also put a vermiculite sheet between the flames and the boiler. This would keep the firebox temperature up, good for clean burning. The big problem with back boilers is that because they are relatively cold, always sub 100C, they quench he flame and this is a big cause of particulates.
  12. Perceived wisdom is you fill the boiler with dry sand and don't cap the top exit so it can breathe
  13. I was going to stay out of this but I agree, whilst the Husky 550 and the Stihl 261 would be the professional choice for carrying around all day and felling, snedding and cross cutting pole sized trees the 545 is entirely adequate and cheaper plus being less revvy should last a bit better. It's only when you start cutting rounds for firewood over a foot diameter that it's worth having the grunt of a 60cc saw.
  14. This is why I liked the Heizohack for rough commercial work, the blades wer cheap compared with others and having them shatter often meant more serious damage to the rotor was avoided.
  15. 😁Yes I suppose so but then I have never tried a home owner Husky and if it weren't for the surplus 262s I would have about an equal number of Husky and Stihl work tools. In the day I preferred the bigger stihl saws and bruscutters and the 60cc and under huskies for forestry work and domestics. Back then the huskies had a bad reputation for hot starting on a hot day.

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