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cornish wood burner

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Everything posted by cornish wood burner

  1. cornish wood burner
    Of course, thanks treequip. It obviously won't reduce the setup tension/sag but by running smoother it will reduce the potential high stresses caused by jerks and bounces.
  2. cornish wood burner
    Have you enough extra capacity in your wood burner to fit a back boiler. You would need to pipe it to run to your DHW tank by thermal not pumped to allow for power cuts. Second burner and thermal store would not be cheap but you could run radiators off it then. 1st option might be worth it but unless you want extra heat you would struggle to justify the second.
  3. cornish wood burner
    Do you mean a double line? It would double up on the strength but you need to pull evenly on each. Bit fiddly to set up I would think Your basic idea is OK I guess but you need to make sure you have no wear problem and your pulley needs to run smoothly. Any snatch or jam would increase the strain dramatically. Also consider what your tirfor will pull. Presumably you have no means to monitor this so I would suggest sizing your cable or rope SWL so it could take the full full from the winch. My concern with a small cable with a SWL of 500kg is that there are a few other factors that could increase the stress on the cable so if you need 4 or 500kgf of tension to support your load go higher on the SWL to allow a safety margin. When I was young I witnessed a steel cable breaking and believe me you don't want to risk that.
  4. cornish wood burner
    Don't go to John Deere? Guess you already know that though.
  5. cornish wood burner
    Exactly. Stress increases by the square of the speed so a little over speed can result in a bigger increase in stress of the rotating parts. I'm sure manufactures will have built in a considerable safety margin but 800rpm is eating into it.
  6. cornish wood burner
    I think you are getting confused between the weight and the tension in the wire. The wire tension generates an upward vector to lift the 30kg. It also exerts a pull between the two anchors. The combination of these two is the wire tension which is what we should be concerned with. The OP didnt want to anchor 30 ft up a tree so typically we are talking around the 400kg of tension to generate an upward force of 30kg with a reasonable sag. If we add in the extra stresses due to movement etc then your cable is probably between its SWL and MBL. Not a good idea for a new cable let alone a secondhand one.
  7. cornish wood burner
    What is the SWL of your 6mm cable? Its not so much the static load more the angle of the pull from the log. Cable inertia would be fairly insignificant, but the inertia of the log when travelling down the wire will increase the strain as it passes the maximum sag point so some safety margin should be included. Anything other than a smooth travel will also increase stress.
  8. cornish wood burner
    If your machine is designed to run at 750rpm I would keep to that. 800 rpm is only 6% over max rpm but you will be increasing the stress by almost 14%.
  9. cornish wood burner
    Obviously you will need to increase the tension for 100M or put up with more sag. If you need a different weight, tension or length its an easy calc.
  10. cornish wood burner
    400kg tension 30 kg drops less than a metre
  11. cornish wood burner
    How much tension do you want on your rope?
  12. cornish wood burner
    All my wood splits with 8 tonne. Remember if you only have a few pieces it fails on you could run the saw through them. £200 extra buys a lot of cutting. As kev says it depends on your wood.
  13. cornish wood burner
    You've got me there what's a Pune ? Not familiar with the machine but I have changed hundreds of bearings so that was a general hint how to remove the remaining piece of a bearing. Apologies if too basic but are we talking about self aligning bearings. Normal method is to carefully clean the shaft with a piece of fine emery, grease the shaft and tap the inner with a softish piece of metal.
  14. cornish wood burner
    Another Rayburn fan here. Cooked our lunch on it, now its busy heating the house. My wood is also free apart from my time and a little 2 stroke of course. Anyway power stations, I wonder if it has to be subsidised or do they just take it as its there. Our energy cost from wood is around 1p per kWh That should leave them some margin considering what electricity costs.
  15. cornish wood burner
    If its just the inner remaining carefully grind it away in one spot until almost down to the shaft. Wear a face shield and give it a sharp hit with a hammer. Sledge behind as an anvil. The bearing should crack along the thin ground out portion. You could grind the other side to make it weaker. Once cracked it should just slide off
  16. cornish wood burner
    That was before RHI payments. Total payback in under 4 years.
  17. cornish wood burner
    Not totally correct. When we installed our first biomass boiler and converted from oil to wood our fuel cost halved
  18. cornish wood burner
    I'm not a climber or even make my living in the Arb industry but as an engineer can I suggest that it might be the point stress with metal to metal. Sling to a metal D shackle does no damage but D to D and you can see where the point of contact was.
  19. cornish wood burner
    As you say it sounds like an immobiliser or ecu issue. Have you tried hot wiring the fuel pump.
  20. cornish wood burner
    If you use that wood chip you will be very sorry. It will take some shovelling out as it won't go through your system. As said by (Niel I believe )use dry chip or it will rot. Aim for 20%mc Hire a good quality biomass chipper such as heizohack or muzmax. Chipping brash can be difficult with these chippers though as the twigs can go through the screens
  21. cornish wood burner
    You have two opposing forces at work. Basicly you need to make your flue draw better than your house. A warm house with an upstairs window or attic hatch open, the house being taller than the chimney, big cooker extractor fan are a few examples of things that could cause the house to have a good draw. Cold chimney, wind blowing down or blocked with soot will reduce chimney draw. Any of these could tip the balance the wrong way and cause smoking, the trick is to find which is your problem.
  22. cornish wood burner
    Southern wood energy have a couple around that size if you ever need one. One mounted on a ridged and the other on an artic. Smaller intake one has 780hp. Can't remember the power of the bigger artic mounted one, but similar.
  23. cornish wood burner
    Temperature is a more likely cause. When the temperature in the chimney is colder than the room then you could get a reverse flow. Our modern chimney on the cold outside wall of the house is more prone to smoking than the old one nearer the centre.
  24. cornish wood burner
    No problem Mark. I was giving the leisure cutters point of view. It was bound to be at odds with most on here.
  25. cornish wood burner
    I was pointing out that stihl specify 16inch can be used with that saw. I totally agree it would be slow but that's what they say. Perhaps you should get them to change their handbook.

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