openspaceman

I've experienced this in the past and as @Khriss says it might be from condensation build up. You can get anhydrous methanol for marine fuel tanks, a drop of which in the fuel should dissolve the water to save stripping down, which assumes of course that the diagnosis can be made without taking the carb apart.

This is much as mine, I have no other experience of these modern insulated firebox stoves than my Morso, when I did work with biomass boilers the smallest was 24kW and the biggest 1MW at an Ikea store. The thing is that even if the jets don't appear to do anything other than split the flame they are still functioning as intended. Sometimes you will see a brighter section of flame above and around the jet, showing it is adding needed air as well as turbulence. Also consider how the air paths see to swirl in these stoves, the airwash comes down the glass and hits the burning wood at the floor then runs back across the burning wood and up the back, then forward across the baffle then exits, a near circular motion. Those jets might not find any fuel gas left in the flames but still contribute hot excess air before it ventures up the flue.

This tertiary air, does it come into the firebox preheated and through a horizontal line of small holes at the back? If so this is to prevent the fire being starved of air and avoid smouldering logs being left, it ensures enough air to maintain a flame when the fire is low. I take it this is a multifuel stove? Generally dry wood does not need primary air after it is started and flaming, if at all. It's smokeless fuels that need primary air to gasify the coke to produce carbon monoxide that then burns as a flame in the secondary air. Is there a way to shut the primary air and prevent secondary air getting under any grate? If not let a bed of ash fall through and do the job. That's it, it has to do with mass flow, to burn a kilo of dry wood requires ~5m3, which is about 7kg, of air. The energy in the wood has to be released by oxidising it and that energy has to raise the temperature in the firebox. Adding more air to a cold fire means the firebox is constantly being cooled. Excess air and wood moisture are bad dampeners to a fire. With the fire burning what do the jets of air out of the small holes at the back look like?

yes transit, pulled on the M25 and weighed off and held at leatherhead weigh station

They were sold as weighlode, basically you put a known weight in the tipper and lifted the bed slightly to a known position, you then read the pressure and referred to whatever calibration table you came up with, I don't think they are in business now but they were primarily for grain trailers. When I was concerned about our guys returning overweight, because we had an issue getting the yard passed as an operating centre, I looked at single wheel weighers, basically an aluminium plate with a stress cell which you drove over slowly, they cost about 1500 quid but the boss just didn't want to know. After I was put out to grass one guy was stopped in a transit grossing just over 6 tonne. I thought up to 15% over was a smack on the wrist and a fine, over that it is a construction and use offence, points and a fine.

I thought Georgie had the blue flames

I think this bluish orange is the area to aim for. As you say if you put a dry bit of softwood on it rapidly evolves offgas ( the results of heating the wood is pyrolysis which means splitting the wood components by heat). This offgas then burns in what is known as a diffuse flame, the oxygen enters the fuel rich gas from the outside, the oxygen then further splits away the hydrogen and burns as a flame but leaves the carbon particles glowing yellow in the flame until enough more oxygen diffuses into the flame and oxidises this carbon. This is where a jet of hot air aids turbulence. If enough oxygen cannot pass into the flame before it cools down (mostly by radiatingto a cool surface) the carbon particles reform to a mixture of sooty particles, some of the carbon atoms reform in the heat to tiny plates of graphene, a single layer of graphite, graphite resists oxidation so once formed these sooty particles tend to carry over into the flue. This is why it is important to keep the combustion chamber hot and with enough residence time for the flame to be able to burn out. My take on this by observing the glass window on my little Morso II, is that you really need to see all the flame within the box to cut soot. Even so I have noticed, as the firebox is small, if I put a dry piece of wood on top of hot coals the sudden evolution of offgas overwhelms the ability of the downwash secondary air and the excess air holes half way up the back of the firebox and I can see sooty smoke. This happens with birch and holly for some reason, of course we know birch has an oily bark but holly? The only way to avoid these yellow flames going up the flue and being quenched is to cut the logs smaller, and not to load above the level of the excess air holes, so less offgas is suddenly evolved and there is adequate air to burn it.. That is a bit of a challenge to me. The main thing is to keep the combustion hot enough with adequate air to burn the tars before they get the chance to enter the flue. Wood moisture is the biggest culprit for lowering the temperature in a modern insulated firebox.

MOT type one is a size distribution/assortment. Round here it tends to be mendip limestone and as it is compacted it crushes down to fill the voids nicely, then you put a wear course on top. If you omit the wear course the traffic crushes it further and the rain washes out the fines. Tarmac planings tend to be 10% bitumen, 40% stone (often limestone here) and 50% sand. Once the bitumen degrades the sand tends to wash out. ECO type one seems to have a mixture of crushed concrete, brick and pebbles and seems to hold up better.

It looks like good old fashioned keynsian economics, couple this with the decision to go ahead with HS2, renewable energy etc.and devaluation of the pound post the referendum the government will spend its way out of depression. Just let's hope UK Ltd. can pick up the baton and run with it without dropping it to China Tech or Trumptown.

I thought that was for clay sites? The Plaisance I drove had been used for road crushing before I got to drive it and I was told this included incorporating lime AND/OR OPC

Talk about thread drift. Anyway your post made me search again and quickly came up with this: "The Far East was where the Mosquito suffered its most difficult losses – not due to the enemy, but to the degradation of the early version of their glued wooden joints (using casein glue in an unsuitable climate) leading to structural failure – sometimes in the air. Early production aircraft which were in India and Burma were condemned on inspection, but later examples in which formaldehyde-based glue rather than the milk-protein based casein were used, were passed as fit to fly." The Wooden Wonder – The Mosquito WWW.TRIUMPHWORKS.CO.UK After its first flight on the 25th November, 1940, the de Havilland DH.98 Mosquito was immediately adopted as a... Which is much what my father said, though I had wrongly ascribed the glue failure to bugs or fungi rather than heat and moisture. He fitted radar to them in 44-45, he had not realised that the tide of war had gone in allied favour when he was sent out, he didn't get back till 46.

We were advised to do this, for cutting wildfire charred trees, and soak them in oil first, a special oil used by dirt bikes was suggested. I tried it briefly but the mills didn't want the timber so we put a Cat 977 and powerfork through the lot and burnt it.

My dad implied it was bugs eating the glue that was the problem rather than boring insects so they changed it to a non casein based glue. I never did find reference to this when I searched for details of their use in Burma.

I've a pretty fair idea Oi, I didn't think we had met.

Sez who? Mind mine is probably 40 years old and measures 8" across the top of the pocket and 8" deep in the pocket

Respect mate, I can safely say I have never got my knee down and don't intend to try but I'm still happy riding.

I noticed my Morso had much less draw than the Jotul 602 it replaced and I put it down to the more tortuous path the primary and secondary air take, especially the fact the flow over the glass is a downwash so it is running counter to heat rising and thus doen't really draw well until there is a good hot flow up the chimney.

Wasn't the traditional method to build the base with heather bales?

I have known a house where a newly installed aga or rayburn would not pass the draw test for the chimney, it was not lined and the flue exhausted directly to a 9" brick chimney. The house was centrally heated and there was an open fireplace in the sitting room and that chimney was some metres taller than the aga one in the kitchen extension. I surmised that the heat from the aga was not sufficient to overcome the cold air in the chimney exacerbated by the warm air exiting via the sitting room actually causing a downdraught at the aga. I never did get told the final outcome

is your council so inflexible they couldn't allow you to be seconded to the parks department for a while?

I didn't know whether to laugh, like or just await the incoming onslaught. Yes Harsh and unkind but with a fair amount of truth excepting the old bit.

Sounds like a draught problem as the one downstairs has a longer chimney. Are they both running at the same time? Are both flues lined and insulated?

I've no doubt the breweries get paid for it. Not including the word "grain" would have left "brewers" which would have been meaningless as brewers' grain is the term that was used for them when we fed them to cows, yes they would have contained vestiges of malt but it was the maltose that the brewer fermented to make the beer, so most of it would have been removed.

Brewers grains, it's the spent mash rather than malt which is in the beer, cows loved it. I get my logs for no payment because they cost time and transport off a job. Once they get to the yard I don't get offered them.

It's the same with the Dosko on the team I was helping with, I always ended up as the brash dragger chipper feeder, it does the job with care but it's frustrating when you have used a chipper that you can drop a piece in and just walk away. Also the fumes were becoming a problem with my breathing and the noise is an embarrassment in urban situations BUT it's better than nothing.