Jump to content

Log in or register to remove this advert

openspaceman

Veteran Member
  • Posts

    10,010
  • Joined

  • Last visited

  • Days Won

    5

Everything posted by openspaceman

  1. It shows how there's always someone out there trying to catch out someone in the limelight, who'd want to live in that situation even if he's a pernicious creep.
  2. I wonder where all the line worn off ends up
  3. Drying does not increase the amount of heat from a given log, it has just driven off the moisture and made it lighter but releases about the same energy. If the piece of wood had not been dried some of its energy would be used to volatilise the moisture first, so the heat is not available to the room but goes up the chimney as steam. The more significant effect is than in turning the moisture to steam the fire gets cooler and burns less completely, hence more pollution. The bit about burning too quickly is rather spurious because in burning quickly it gives out heat quicker, if it's giving out more heat than required it's normal to turn down the air control to compensate. @Stere the late Tom Reed, a combustion chemist from america, produced similar results to that graph, I have tried to explain the reasons in the past. Firstly the flame on a wood fire is largely not premixed like petrol:air in a saw or gas:air in a gas burner, it is diffuse, the hot wood gases meet incoming air and diffuse into each other at the flame:air interface. The oxygen in the air reacts differentially to strip hydrogen from the gases and these carbon bearing remains glow yellow in the flame. If the conditions are good the hot carbon meets fresh air and burns out, if not it exits as soot. A premixed fuel to air has the gases and air intimate and the burn is simultaneous so no carbon left to glow and the flame is blue, this is how a gasifier burns a flame. We all know that if you throw petrol on a fire it doesn't burn blue and the carbon cannot burn out because the air is not able to supply enough oxygen, so we get black sooty smoke aka particulates. When air dry wood burns the heat from the fire raises the surface temperature of the new log, firstly to 100C as any surface moisture is driven off and then the wood pyrolyses evolving the woodgas and leaving char on the surface, the woodgas burns higher in the fire and oxygen combines with the char, burning it away and the next layer in repeats the process. You will see the moisture in the wood controls how the wood burns away. The less moisture the quicker the log can pyrolyse and burn because volatilising the moisture takes some energy which has to be supplied from the burning surface area Pyrolysis is slightly exothermic above 330C and below 440C so if there is little or no moisture present to rob heat a chain reaction can occur in the wood, the wood can quickly pyrolyse throughout with no extra energy from outside once the temperature is high enough to initiate pyrolysis. The wood then evolves more woodgas that oxygen can burn and like the petrol analogy soot is given off.
  4. Generally where the utility is to supply more than one other property the utility will require an easement, this gives them more rights than a wayleave and will prevent any building or other works which might impede the utility on the land, it is irrevocable. As the properties are so recently sold there should be details of what rights went with the properties, rights can be quite specific
  5. Math is american, maths still good English
  6. It's interesting how different peer groups have differing takes on subjects. This forum is populated with a majority of entrepreneurial types who are spurred on by success, this leads us to tend to be right of centre, question our masters and be sceptical. I can look back of a number of political events, from vietnam era and onward and with hindsight and occam's razor I note that the most likely reason for things to have happened are simple and most conspiracy theories are propounded by people out to make a buck, or sell a news story.
  7. Well of course the population isn't very locked down and there is enough contact out there such that there are still 2000 new cases being found each day. It points to there being some super carriers out there and certain situations, dense housing, large multi occupancy household etc. meaning that containing the disease in these situations is not possible. Everything also points to increased viral load leading to much more severe effect of the disease, so repeated exposure is likely more damaging.. I'm just grateful I don't live in a high rise, commute using public transport or aeroplanes or have to meet indoors with may people in my normal life, let alone now. The thing is legislation has to be one size fits all so we all suffer.
  8. If you think about it general anaesthetics are avoided for most older people, especially those with cardiovascular problems, my mate died on the operating table at 62 because his heart gave out, so as an induced coma is necessary for a ventilator to be used... I'm confident they have learned a lot about treating this virus from avoiding ventilators to treating "sticky blood" and we don't know how the disease has triggered the most fatality, whether it's blood clots, cytokine storm, induced coma etc. There are plenty of 50 somethings on this forum that think they will not react badly to the disease, and statistically they are likely right but even Boris at 53 was dependant on good ICU care to get through it.
  9. Always a good idea to save them wasting their time If it's an earth burn or ring kiln it's exempt from environmental permitting as less than 1MW thermal input if not dark smoke there is no statutory nuisance, still a polluting way to produce charcoal though.
  10. No but I suspect those figures are from the total population less those who have died after being tested positive, a very disingenuous statistic
  11. EA exemptions deal with waste, EA position statement said virgin timber is not waste. Are you using waste to make charcoal? Clean air act refers to dark smoke, are you emitting dark smoke? Combustion generally requires an environmental permit. There was an exemption for charcoal making prior to 2002 but I'm not sure about that now. Of course traditional charcoal making is polluting and emits greenhouse gases
  12. How can anyone be considered to have survived the disease if they have never contracted it?
  13. probably frost damage, where are you? The warm dry spring has caught a lot of plants out. The yellow leaves may indicate a mineral deficiency, keep it watered and wait and see.
  14. Yes or overcoming the OCD tendency and leave it empty of oil after use if the chain lubricates ok. Actually for just a m3 or so of logs a year an Einhell will do it, the one I acquired of is ok, although the consumer oregon bar leaves a lot to be desired, @Tony-1976 is welcome to try it and have it
  15. I haven't drunk alcohol for nearly three years now, it has saved me over 20 quid a week and I lost a kilo. I did get a bottle of white wine for lending a neighbour an SDS drill last week and cooked some chicken in it, I made the mistake of drinking two glasses, couldn't get to sleep. lockdown hasn't affected me too much, I got stopped from volunteering work which was a couple of days a month and only got to do a couple of tractor repairs as felling/winching work was put on hold but the boss has worked with his son and others through.
  16. I see, so that gives the big two a form of monopoly and that is what the monopolies commission was formed for, it has since morphed in a few steps to the Competition and Markets Authority and a case should be put to them.
  17. Yes but he doesn't believe he is vulnerable even if he is of an age, but then neither did Boris. I actually do not disagree with him about risk taking and I think the treatments have evolved that people hospitalised with it now are likely to stand more chance than at the beginning. Trouble is I think there is worse to come as the disease has hardly started on the population yet.
  18. If I had to do this, and I'm no joiner, I'd clamp a steel disc to the wood and use it to guide a router as deep as I could from both sides and then cut the remainder out and then use a block plane and sander. I am collecting an old oak post for a mate from my old felling partner, he has several in his assorted fencing left from when he retired twenty years ago, I intend to freshen that up with a plane. I can see what he has and post a photo if you like. They were cut out on a Forester 900, near Godalming.
  19. Yes I agree, used is likely to have issues, I only bought one Makita, a DCS5121, from new, and never had any problems with it. I regret having to leave it when I got pushed as I doubt it got used since. How old is a 109? It looks similar to a 114 I have, which I repaired and never have used. fitting an oil hose shouldn't be a big deal but it might open a can of worms.
  20. That makes sense as you've established a name. It never ceases to amaze me how ebay and amazon reached such a dominant position when in a competitive world you would expect cheaper services to challenge them.
  21. A couple maybe, a whole litter grown up don't fall over in front of them.
  22. I only remember larch and london plane as causing irritation but there wasn't much WRC then, although the FC were planting a lot in mix with beech. I had a customer who was an army doctor and then navy gynaecologist who was a serious wood worker, he developed a reaction to sawdust over time such that he could only work using a full ventilated helmet. I guess the body gets used to an irritant and then reaches a stage where it over reacts, like toxic shock, cytokine storm and anaphylactic shock.
  23. This is why I got into forestry but lord knows why I ended up in arb, a service industry to the wealthy. We saw a lot of toolmakers and industrial machine operators come into the forestryas primary industry got sidelined in the 70s. A poor traded for people highly skilled, time served to a job which is semi skilled at best.
  24. The NHS arose following a conflict the conclusion of which changed the mood of the country toward the need to look after each other. I grew up as the welfare state progressed and have always been grateful for it, mind there were problems. The money spent on it probably did affect economic growth compared with more pushy regimes. Recently we have elected governments that wish to grow the economy, to their peer group's advantage, at the expense of care. There is little I can do to influence this government's wish to go down the american route of health care other than stand out there and clap to send them a message. Yes this is actually on top of a raft of leglisation since new labour's control freakery to "manage" the bulk of the population and is very worrying.

About

Arbtalk.co.uk is a hub for the arboriculture industry in the UK.  
If you're just starting out and you need business, equipment, tech or training support you're in the right place.  If you've done it, made it, got a van load of oily t-shirts and have decided to give something back by sharing your knowledge or wisdom,  then you're welcome too.
If you would like to contribute to making this industry more effective and safe then welcome.
Just like a living tree, it'll always be a work in progress.
Please have a look around, sign up, share and contribute the best you have.

See you inside.

The Arbtalk Team

Follow us

×
×
  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.