openspaceman

That one doesn't have the reinforcement to stop the hand hold from splitting. That type I remember had a steel rivet passing through the hand hold with washers each side.

Well done, I bring a few homers back when I cannot get the job done in the couple of hours our repair cafe runs. Rust steel swing seat in my garden in mid repair today. As has been said tool handles were often cleft, not because it was easier but because the grain is more likely to be continuous where a saw can cut across and leave it "short grained". I know scythe handles were steamed to get the curves but I imagine some were straightened similarly to make rake handles.

I thought their main function was to prevent erosion and entrain silt to form a stable bank. I attempted to make firmer fascines by compressing them with the grapple loader. The EA (IIRC) guys rejected them because they couldn't drive stakes through them.

It was a "united we stand , divided we fall" message . I think it was Mussolini that picked up a stick and broke it and then picked up a bunch and showed the crowd he couldn't break the bundle,

Yes but I think those who got their full licence after 1997 have to ask for BE to be put on the licence, else it should be added at renewal.

Sorry my mistake I should have looked back a bit further and seen it was @JMA46 that was wanting to supply direct air to a 21kW boiler.

@Rob_the_Sparky has explained why it is best not to rob heat from a wood fired boiler and I never saw it done on the commercial chip stoked boilers, or the smaller batch fed gasifying boilers I dealt with. Also they were never room sealed as they sat in dedicated boiler rooms, so the air was drawn in from the highly vented room and the exhaust was drawn out by fans after the heat exchanger had cooled it to around 115°C. I am not saying it couldn't be done but balanced flues run concentric to the air intake in ss pipes and only for a short distance. The OP says he could take air from the loft into the chimney then down to the boiler, all I am saying is it should not take heat from the flue and a fan would be needed to maintain a depression in the boiler (so any leaks could not allow combustion gases out and to eject the exhaust at some speed to get it away from the building as it would have less buoyancy than a normal wood stove exhaust ( as they tend to be hotter than boilers' exhausts. There may be regulation and practical difficulties as well. What I should have explained is that with a gas boiler the aim is to condense water vapour in the exhaust in order to extract latent heat from it. Gas burns more cleanly and only gives off water, CO2, Nitrogen, some O2 and a little SO2, the condensate is mildly acidic and gets drained via a plastic pipe. Wood is more difficult to burn and gives off a whole rake of acidic compounds, if these condense in the flue they will eat through a stainless steel liner.

Perzactly

Can you elucidate, I don't understand the question? Also how do you define efficient? Is it how close to complete combustion of the fuel different heaters get or how much of the heat ends up in the living space?

Very sensible. I don't have much to do with climbing ropes but should have done the same. I had hoped it would be possible to splice a new novoleen 50m onto the unused end of mine, Youtube videos seem to show the possibility but probably beyond my capability. Also there is noticeable wear on the capstan which is probably from muddy rope.

I have not looked at pictures, am busy for once; I do not know what happened to the Arboricultural Advisory & Information Service at Alice Holt but the Forestry research there have the lab facilities.

I generally agree especially about incoming cold air cooling the flue too much and causing condensation of water in the exhaust. Even if the flue continued a few feet above the inlet air the path would be too torturous for the buoyancy of the hot exhaust to drag the cold air all the way in. In principle (apart from the condensation issue) the concept is the same as on a modern gas boiler, with a balanced flue, but that has a fan to drive the process. So I think it could be made to work with an induced draught fan at the top of the flue, driving the exhaust up away from the intake as well as creating a depression in a room sealed stove to suck the air in, whether it would meet building regs is another matter.

Surely it has the label attached that show the rating? Most ratchet lashings have a label marked in daN (dekaNewton ten Newtons) which is near as dammit the same as a weight in kg. Breaking strain will be about double the figure.

Tradition, most of the bits were made in the woods with hand tools and then assembled in a workshop.

Looks like a chair back; add four beech legs with three stretchers, eight beech back spindles and a cleft oak splat, elm seat and you have a windsor chair.