openspaceman

I hope none of the neighbours took a photo of me retrieving a plastic bag from the apple tree today with no harness http://www.facelift.co.uk/news/scaffolder-could-face-jail-after-being-photographed-60ft-up-wearing-a-harness-that-wasnt-attached-to-anything?utm_source=HighTimes+Newsletter&utm_campaign=a5594b62f7-HighTimes_February18&utm_medium=email&utm_term=0_0a04bd58ec-a5594b62f7-182706821

That's why many relays have a snubber diode across the coil, if it doesn't maybe worth fitting one they only cost pennies.

That's what I thought but 'phoned the Dutch company and they said it would need to go through some sort of type approval

I think this is the same arrangement as a Dutch firm I looked at for my old job where we had a carlton 7018 to move around. I liked it because the coupling could be covered to make the grafter a flatbed when not towing. At the time the coupling was not homologated for UK. Thanks for that.

I've never fully understood how the superimposed weight was interpreted in relation to the trailer weight but had guessed the 3.5 tonnes limit for a trailer with the post 13 BE meant the weight of the trailer in isolation from the tow vehicle. Just for instnce how would you consider a traditional trailer with 1750kg on each axle and 100kg nose weight? yes but only on a pre 2013 BE ??

I don't think they made them other than in 2004 plus there's a bit of problem that whilst we oldies could drive one anyone post 97 would have to go full C or C1 plus E as the later B+E won't cover the trailer. So a person with post 97 is probably better getting the +E to manage with a GTW of 3.5 plus 3.5 trailer. Next step is C +E as it doen't seem worth going C1+E, I've just lashed out £1800 to get a young lady through this I'll have to see how she gets on

Yes this makes sense but what's the unladen weight of an iveco downplated from 5.5 to the 5.35 necessary to keep the GTW below 8.25? It would need to be 2.35. Of course there is some scope for putting the buckets and ramps on the trailer to reduce the weight of the digger on the truck. In fact we weighed our mk2 safetrak all filled and ready to run at 1.9 tonnes IIRC so it's the ifor tipper trailer that puts the towed weight up to 2.9, We reckoned the safetrak on our 8x4 trailers were just about legal to tow with a transit mk7 at 2.5 tonnes.

Yes but we have been through this before, it's unlikely to find a 3.5 tonne vehicle that can tow 4.75 tonnes and then towing 2.9 tonnes the op asked for means you have no payload on the truck

C1+E without the 107 restriction (which most of us got and restricts us to a gross train weight of 8,25 tonnes) allows GTW of 12tonnes. So to tow 2.9 tonnes I would need a truck with gross weight (Maximum Allowed Mass) of 5.35 tonnes

Chalgravesteve isn't looking at the whole system, now it won't be applicable to most applications but you're getting there. With wood burners you cannot cool the flue below about 110C without creating problems, but if you have a high temperature recirculating kiln then your flue gases have also to be hotter as there has to be a temperature drop from the boiler to the kiln. So there is usable heat after the flue leaves the boiler but it's low grade heat. If the kiln is operating at high temperature and there is no heat recuperation between the kiln exhaust and the fresh air replacing it then there is also a lot of low grade heat in the now saturated exhaust at kiln temperature. Hertswood's scheme is even better because the flare from the charcoal making is around the same temperature as burning wood outright so running a pyrolysis unit in series with a drying kiln and then a use for low grade heat e.g. underfloor heating slab makes good use of all the heat and saves the complication of recycling kiln heat. The challenge is to do it all cheaply enough to justify the fuel saving.

Don't make the mistake I did, I bought an ex tarmac one, not only did the insulated floor add 3" to the loading height but it had extra springs which raised it further. Okay for machine loading or chipping into but pig to throw logs into. We had no trouble with it mechanically but I wasn't keen on the auto box as it was too high in first for pulling away from junctions.

supplies less than 75kVA tend to have whole current meters which measure real power so power factor doesn't come into it unless the run from the meter is long enough for I2R losses to be significant.

Is that the target? Is the cubic metre related to solid wood or loose wood bulk density? What start moisture content and finish?

As RHI was only supposed to cover the difference in cost of a biomass boiler compared with a fossil fuelled onethere must be other ways: 1 second-hand wood fired boiler; they seem to go cheap enough I saw a 500kW one that we installed 4 years before get knocked down for 10% of it's price 2 gas fired system to "polish" off the last few percent moisture content, on a large scale it can be had for under 3p/kWh and when you look at the O&M costs of a wood system the labour saving may be worth having 3 Make use of the downstream heat for heating a building. incidentally I have a couple of bits of kit that didn't sell with my boiler, a 12kW fan coil unit and about 10m of Hep20 pipes for it and a circulating pump, could be ideal for a recirculating kiln. Also a silo unloading auger and three phase motor with reduction gearbox, missing a drive chain, bearing and sprocket; As the boiler wouldn't burn fresh chip and needed it below 25%mc to burn at all cleanly I had intended this to use in a simple chip dryer by blowing heated air along it. In the past we had managed to dry fresh G30 chip down to 30% in less than 20 minutes with 90 degree air. With insulation and a little playing with angle of the auger I think one could dry 25kg of 50% green chip per hour with 12kW, down to 16.5kg of 25%mc chip

It differs from the FC blue book which suggests 530 and 560, the difference could easily be in the tyloses and tannins in the heartwood of the oak. Birch is also stronger than oak in most cases and modes but of course its use is limited by its perishability.

Yes the crushed leaves give off cyanide, it was used in the past to kill butterflies for mounting . Cyanide is so reactive I don't think it would;d persist for long but I wouldn't shovel freshly chipped branches with leaves in an enclose space, like the back of any truck. The wood is as good as any other cherry for burning.

Carrying stuff from a job to a customer would be within the exemption of material necessary for the job according to the VOSA officer I spoke with, it would be interesting to see it tested in court. Picking logs up from the yard and taking them to a customer wouldn't be unless a forestry or agricultural undertaking.

As it should be but we're probably in the minority.

Wimpout! ;-) No I didn't see it but it's on the cards and in terms of the proportion of airborne particulates attributable to source it is claimed to be as bad as diesel engines, yet over time with diesel engines with their DPFs reducing their particulates Addblue their precursors by over 80% what's likely to be next in the firing line? Just consider; if you look at a car exhaust now what do you see after it has warmed up, look at a woodburning chimney after it's been running half hour what there?

Let's just disagree amicably then Stubby

Indubitably, about 0.3% for every degree of coolth. My point being a stove doesn't gain anything by it. I think I have mentioned before a stove and chimney is a very poor heat engine as the only motive power it contributes is circulating the gases up the chimney.

It's not an engine; an engine is limited by the mass of air it can cram into the cylinder, so more dense air=> more fuel to burn and higher pressure to expand it from. the pressure which the air expands through is directly related to power. A stove is not limited by the amount of air it can take in, it tends to be limited by the surface area of fuel and surface area of heat exchanger. Get your stove really going well and then look at the size of the air opening it needs to have good combustion. Typically a 5kW(t) wood burner will run at full power on just over a kilo of dry wood an hour. that needs 6kg of air plus the same again excess air on small stoves. So that equates to about 16m3 of hour passing through the stove. An occupied room typically needs 5 air changes and hour. In this little room that equates to 145m3 of air an hour.

The decision making for salting must be quite difficult and we all have heard how the salting budget gets used for extraneous jobs, like replacing kerb stones in March for fear on having it reduced for the following year if the stockpile doesn't get used. We have a similar problem with organic slush outside my house in mast years, the acorns from the property opposite get ground up but as they end up in the gutter it's less of a safety problem. I sweep them up before they get crushed to stop the mess being carried into the house. others don't but here in January there's no sign of any residue so much must have got into the gullies.

Since there was a bit of discussion about hoth air igniters some while back I bought a £17.50 Einhell (matches the saw I was given) hot air gun. I load the fire and point the gun through the air inlet, never takes more than a minute as long as there is a bit of split pallet wood in the line of fire.

Well not willing to argue with your well qualified wife but if you read what I said I said they would not strip oxygen *quickly* and the amount of wood put on the road would be insignificant compared with the effects of leaf and needle fall and other plant derived debris . Also why should the road drain into a high BOD environment like a foul sewer? I agree if you add it to any nitrogenous waste then it will allow microbes to attack it and they will deplete oxygen Again the whole business of a pulpmill is to separate the components of wood, the undesirable component is lignin which is dissolved by adding alkali and heat and the resultant liquor is high BOD, the long chain cellulosic fibres which are retained for the paper making. Agreed some will escape and they will be of very high surface area so more easily attacked and degraded by aerobic microbes which will need oxygen. The waste from a paper plant I was familiar with had to be massively diluted by water purchased from british rail in order to meet the discharge standards for the estuary. I agree with that bit entirely. There have been problems with fine grit (particularly from building sites) damaging the gills of smoults. Again if you follow the original link the wood chip (I referred to wood in the article not pellets made from densifying and compressing sawdust) is also coated with a chloride (magnesium??) so it may have been intended to better retain the chemical on it's surface and increase the longevity of the product.