openspaceman

Electricity act 1989 shedule 4 9 (2)The licence holder may give notice to the occupier of the land requiring him to fell or lop the tree or cut back its roots so as to prevent it from having the effect mentioned in sub-paragraph (1)(a) or (b) above, subject to the payment to him by the licence holder of the expenses reasonably incurred by him in complying with the notice.

Coppard Hire do an RC 100 with a seppi or foresatl flail but it costs over £500/day. Practicality Brown had a similar one 6 years ago.

I have had one of these drills returned as it was rough running. Had a quick peek in the exhaust and bore and rings OK but it is running very rich even with filter off and HI and LO screws on minimum. I have had something similar before on a Husky when a welch plug leaked but before I take the carb apart any suggestions?

Yes I was getting my terminology wrong, rail=line blockage ua=shutdown, I do both occasionally but never get involved with the safe system of work. In fact when I was in the situation of letting these other ua contractors across my worksite it wasn't that they objected to my doing the work but more that their payment system would not allow me payment and I could see I would have to take them to court to get the money.

It can be worse than a straight line correlation as the higher the moisture content the more primary air you need and this adds massflow which means the fire may never reach a good working temperature. Also the dew point of the flue gases is lower so condensation occurs at a higher temperature which is why it is necessary for the flue gas to be at above 100C as it leaves the stack, given that a condensing gas boiler will vent its flue at 50C with the water as visible droplets and you can see a woodfire will always be wasting more flue heat than a condensing boiler. Having said that a general ruel I use is to take the oven dry weight of logs I have and multiply by 18.6MJ per kg od (for hardwood) then subtract 2.7MJ for every kg of water (neglecting water formed in combustion). So a 2kg log at 15% mc wwb will have 1.7 kg od and .3kg moisture and burned cleanly the most heat you will get out will be 1.7*18.6-.3*2.7=30.81MJ in practice you cannot get this heat into the room because you have to raise the temperature of the combustion air to the flue temperature and dump it up the stack, whilst a gas fire may only need 10% more air than the stoichiometric amount (this is the amount of air needed for there to be the exact amount of oxygen to combine with the fuel) the woodfire will typically need 100% more air and this excess air gets a free ride from the room and up the chimney carrying heat with it.

They tend to be inter related, moisture needs a lot of heat to turn it to steam, 1 litre of water needs 4.186 kJoule for each degree you heat it up so you need 4.186*90=94.186kJ to get it from 10C to boiling but then have to add 2.300kJ to turn it to steam. It's robbing this heat from the fire that quenches the flames and prevents combustion from completing and it's the products of incomplete combustion that then condense out with the steam to foul the chimney.

Easy enough with mapmaker but you'll need the pro version. I'm not very good with databases but have tried to adapt ones (for team skills)and think it best to start from scratch. You need to consider the basic architecture of what you want out of the database. It's easy enough to create a flat table with a record consisting of a unique index co-ordinates, tag ( but who needs a tag if the co-ordinates are accurate and replicable), heigh, girth, crown spread, condition and date. What else are you wanting?

The black cab ones will be 15 years old won't they? How would their productivity compare with the Logset Titan I was watching on Sunday? I've been looking at two 840s, cheap enough at £5k but what expensive repairs might they be hiding, not to mention cost of tyres.

The legislation allows a landowner to do the work and reclaim reasonable costs. Getting the agreements in place for a line blockage would be a problem though.

When we handballed pulpwood onto trailers we reckoned 1 tonne per man per 20 minutes was good going

I've just paid 65.75p for gasoil with similar cv I think that is a bit low, hardwood oven dry is about 18.6MJ/kg and the additional losses from dumping the extra 15% moisture as vapour up the flue is only about 0.5MJ, bigger losses are likely from excess air. Whatever your customers will stand, it is a luxury good and not a fuel

My colleague Danny made a plate with 6mm holes which he had a shallow countersink so the edges were sharp, we prepared 1" disks of dry pine between the whorls and forced them through to make some pellets. It worked in a fashion because the wood could compress but wet wood jammed it completely.

Caveat Emptor

I always thought the Highland bear was an 1164 with cranab 4510 on the roof and either 4,5 or 8 tonne double drum winches and a log rolling blade.

If you cannot justify a hydraulic splitter you probably cannot justify a screw splitter also. Screw splitters can often prise apart ragged sections between knots where a hydraulic one will fail but they produce a poor looking log. If they fail to split a bit they just bore a conical hole but even if the piece splits it will often not fall apart, needing further work with an axe. It's probably best to wedge the ring vertical between two flat ones and rip down with the saw, rotate it through 90 decrees and repeat. This will produce "woodwool" rather than normal chainsaw flakes which you will need to clear frequently, make sure the saw clutch can get rid of these stringy bits without binding.

They are reputedly rebranded CTEK ones that cost over £40 on ebay. They look like this: Once they are connected you cycle through the functions by pressing the left hand button. When it is charging a red led is on and green lights when charged. It is safe to leave it on all the time but you are advised not to charge when the battery is connected to vehicle, in practice I have had no problem doing it in a vehicle.

Lidl or Aldi occasionally sell a Tronic 3.6A intelligent charger for 10 quid which is good for all but the profoundly dead batteries. It is protected against overheating, wrong polarity and over charging. It has settings for gellcells, motorcycle and car batteries as well as a winter setting.

...and this is the rub, as it desiccates it becomes more palatable, so animals eat it, this is why it is dangerous in hay. When green the animals avoid it. So even if the plant is dead animals should not graze the field. Also it's a biennial so the plants you see flower this year were seeded two seasons ago and the ones that are just rosettes this year will flower next.

Lamberhurst engineering (TN3 8DS 01892 890364) still keep some spares but if it is an oil seal it will be available from a bearing dealer and plastic gasket replaces most paper ones.

Are there any field scale tulip fields visible from roadside in UK? My daughter has had to cancel a trip to The Netherlands for a flower festival and I wondered if there was a sight worth seeing in the eastern counties.

It was a requiremnt in some cases to preserve "nightwater" as this once allowed to go stale was used to filter through fresh dry wood ash would react with potasium carbonate to give potassium nitrate, saltpetre. Not only was this the oxidant in gunpowder but also the ingredient to preserve and flavour ham. Oestrogen from urine collected at convents was original ingredient in the contraceptive pill

Dimethyl ether would be a good diesel fuel if injected rather than pre mixed. It also has the advantage of being easily synthesized from carbon given cheap (nuclear) energy. wd40 is a safe alternative to get a diesel to fire if it has a fueling problem.

A diesel engine works with a full cylinder of air which is heated during the comprssion stroke to above 300C. At this temperature the droplets of oil light as soon as they are injected and continue burning smoothly until combustion is complete. To do this succesfully the piston rings have to prevent the air escaping into the crankcase and this is achieved by them having a square edge. The ether in easy start delivered in the air intake becomes premixed with the air and it then detonates throughout the combustion chamber as the compressed mixture heats up. The shock from this knocking is the same as pinking in an si engine running on too low octane fuel and it can erode the edge of the ring and air can get under the rounded edge, hence losing compression pressure.

BTU is just the old imperial measure of heat energy, possibly in use before Joule demonstrated that motive energy and heat energy were the same. It is the amount of heat necessary to raise the temperature of one pound of water through one degree Fahrenheit. All energy units are interchangeable so using madisons handy converter: 1 kWh=3412.142 btu=3600000 Joule=907184.7 kilocalorie 1kg of bone dry wood contains between 18.6 and 20 MJ or 5.166667-5.555556kWh which is 63465.83-68242.83 btu. There is only one imperial power in the world today and they still use imperial units.

The standard way of determining calorific value is by burning the substance in a bomb calorimeter. The whole apparatus is immersed in water and enough oxygen to burn the wood is in the vessel. The rise in temperature of the lot is used to calculate the cv. All plant matter has a similar cv at a given moisture content and after the ash is subtracted, softwoods tend to be a bit higher as they have higher lignin and resins which have a higher cv than cellulose and hemicellulose. The thing I like about alder is it dries easily, keeps well and is easy to light. It grows straight and is easily processed. Oak takes a while to dry, it is used for barrel staves because it resists moisture movement tangentially plus the sapwood is about as perishable as poplar.