openspaceman

Can you still buy them? I'm after some collapsible ones that can fit in a jacket for when walking badly overgrown footpaths and 40mm capacity would be marvellous.

Let me know if they beat £270 delivered

...but I think I made a mistake in logic. The CAT cannot compute depth from the timings on the different aerial levels so my guess is it uses the difference in attenuation of the signal between the two levels to estimate the depth assuming the source is a point and an inverse square law for the signal attenuation.

The ones we use are about £450. The training is about 1/2 day and needs refreshing every 2 years where I work. The theory is simple, the device picks up electromagnetic radiation that escapes from a conductor carrying a current, it listens for the "noise" given off. The Cscope ones I use have 3 different listening modes, the first is for mains "hum" at 50hz and possibly its harmonics, the second is radio frequencies which the cable can pick up from equipment attached to the electricity supply and from the general background as it acts as an aerial. The third is special, it is tuned to the frequency of a signal generator that can be attached to one end of a cable or can be induced into a cable which is at a known point. This latter is especially useful as the aerial in the detector is at two different levels and it can calculate from the difference in time each level receives the signal how deep the cable is. They have to be recalibrated regularly to be certified for use and battery level needs checking before use. From the above you will see if there is no activity on the cable, even if it is live, it will not have any "noise" and will not be detected. similarly no conductor then no signal so an all plastic or fibre optic pipe cannot be detected unless it has a conductor incorporated or laid with it. Main lesson is to use all frequency modes to mark what cables can be found and avoid them but then not assume that if no signal is found there is no cable or service there.

Good point, the only reason to try the screen is to avoid skipping it away. Local skip merchant has a grab lorry @£50/hr which may work out plus I have a long term need to grade woodchip.

I'd have to use the telehandler to load the screen. As I said I only have some soil contaminated gravel to clean and a large ash heap to process but I would like to try it on some woodchip to get the fines out.

I've got some stuff to screen, pebbles contaminated with soil, I'd also like to riddle through some fire ash and try it on some woodchip. Anyone in Surrey hire one that could sort 20 tonne/day?

I thought that was for licences obtained after Jan 2013, the post 1997 ones can have a MAM of 4250kg as long as the trailer is less than 750kg. It isn't clear on the gov.uk as they mostly just mention the MAM of the vehicle and MAM of the trailer not exceeding 750kg apart from Towing trailers or caravans with vehicles up to 3.5 tonnes | nidirect Where it states "Category B: Vehicles up to 3,500kgs MAM and with up to eight passenger seats A category B vehicle may be coupled with a trailer over 750kgs MAM, provided the combination does not exceed 3,500kgs MAM. Or it could be coupled with a trailer up to 750kgs MAM, provided the combination does not exceed 4,250kgs MAM." I stand to be corrected.

Yes my understanding is that you may drive a vehicle with a MAM of 3500kg fully laden and pull a chipper up to 750kg. If trailer has a MAM of more than 750kg and the combined MAMs are less than 3500kg you may also pull the heavier trailer but getting the weights right becomes more complicated. I suggest you'd be well advised to get the +E test.

Not to mention breaking beads for a puncture repair

If you manage to identify it this site is good: Replacement Keys & Plant Keys | Keyking Supplies Our JCB key fits the Jensens so I imagine Entec is common with something else.

Al I did look there first, because I am 10 years out of date on domestic systems (I have reason to know something about this because one of my colleagues imported the first domestic pellet stove/boilers in the early days before they could be fitted under building regs, I still have one of them and a couple of other redundant pellet stoves which I intended to run on woodchip), anyway both the retrofit systems they show have the boiler circuit vented with its own F&E tank.

Cheers I'll be grateful for that

Interesting; back in the 80s I ran a 2.3 petrol Bedford 3.5 tonne truck, it was cheap to buy but the reason I went for it was it's kerb weight was 1500kg so it had a full 2 tonne payload, diesel engines were so much heavier.

I've had a look at one of these, beaten about but sound engine and transmission, but the joystick is playing up. As Danfoss no longer do them I'm thinking it may be cheaper to replace the spoolblock and joystick together but wonder what options I have?

Fair enough but do you know of any non automatically stoked solid fuel boilers that are certified for direct connection into an unvented system? Part G apparently allows it as long as there are two separate safety devices but I would doubt the extra cost is justified just for DHW alone, as a couple of baths and washing up (I prefer the dishwasher which has a cold feed anyway) will only cost 5kWh/day =75p so any investment has to be able to make a return of £130/year on savings over electricity. That's only for the 6 months the stove is running. I'd go for a cheap thermal store with its own F&E tank plumbed in to the combi system or a plate heat exchanger ( which would involve a bit of logic to switch pumps on when the boiler is up to temperature) but would need a radiator to bleed of the few kW of heat the stove would be producing once DHW was up to temperature.

I wouldn't like to say which is worse but petrol actually resists pre-ignition, higher octane more so,whereas diesel ignites at a lower temperature. So for a premixed engine you want high autoignition temperature and low flash point and for a compression ignition engine you want the fuel to start burning as soon as it is injected. I suspect diesel would not harm a petrol pump but neat petrol will not lubricate the diesel pump. Diesel in the petrol engine is likely to detonate if it runs at all and this will soon ruin the engine.

Stirrup leather

It covers land under the openspaces act of 1906. and that was " any land, whether inclosed or not, on which there are no buildings or of which not more than one-twentieth part is covered with buildings, and the whole or the remainder of which is laid out as a garden or is used for purposes of recreation, or lies waste and unoccupied" It was things like epping forest or the big public parks but not necessarily the urban district commons which became public openspaces after the 1925 law of property act.

Heckler & Koch here This launcher base looks remarkably similar to the thing we used for launching empty cocacola cans as shotgun targets.

Now I understand how you can feed 50 tonnes/hour through a chipper!

In a house? My heart sinks when I find I have been signed in to a B&B with a triton shower. Electric showers top out at 10kW, cost about £1.20/hour to run and feel like an incontinent rat pissing on you, switches seem to burn out regularly. A 24kW gas combi running a shower costs about the same and gives a good invigorating wash for 5 minutes. Our water pressure at home isn't good enough for a combi and we have the gas off till winter but the 3kW immersion only needs to be on for 30 minutes and the water is hot enough to run a power shower for 5 minutes.

Should be doable but probably fall foul of the waste regulations. Have you ever seen the form you have to sign when collecting someone's ashes. Human body approximately 70% water, probably 5% ash so 25% dry matter with the fat pushing up the calorific value to say 20MJ/kg. I don't know the regulation but generally incineration requires all products leaving the device to be held at a high temperature for a couple of seconds, I think 850C is the figure. Big problem would be from amalgam fillings. Would the body have to reach this temperature? Because you won't manage that in a retort but might in a kiln. However with just 25% of the mass to use as fuel and the need to reach 850C the char yield would drop to about 3% of the wet mass. Whilst there would be enough energy there to evaporate the water it would be released at the wrong time to do any good. This is why the engineering department at Cardiff worked on 2 chamber crematoria that were preheated in the morning by gas and then bodies added sequentially so one burning body predried the next one. This minimised the used of the gas support fuel and I am a bit surprised about the comment of high gas bills because once the chamber was up to temperature only a small amount of gas would be necesary to guarantee everything exited at 850C

Does the spool that triggers the return have a detent holding it in? I would expect the pressure relief to blow off before stalling the engine. A quick fix might be a relief valve on the return port.

I see I made a mistake, bark looked norway spruce on the one with the pickaroon in it. Whorls on earlier picture more pine looking. Going back to the original post I see Lodgepole is stated. so 0.5m3 stacked billet at 70% stacking=0.35m3 solid. 0.39 basic density gives 137kg od. 197kg of water associated with this in a green bundle looks around 334kg and at 15% mc wwb should weigh 161kg, at least the final figure seems to agree.