openspaceman
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Everything posted by openspaceman
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I don't think flame speed comes into it very much, I think higher RON fuels has a slightly lower calorific value, it's just that the lower compression engine burns at much the same temperature but the power stroke expands from a lower initial pressure, so you get less work out of the heat put in. Conversely if you put a lower RON fuel in an engine that is designed for higher RON then as the piston compresses the fuel:air mix it may become hot enough for the fuel to ignite before the spark or, more likely, as the spark starts the combustion, the pressure and temperature from the expanding flame front detonates unburned fuel.
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Yes @Johnsondsays the the pressure relief valve is on the (spool) block then neither pump is protected if the manually operated valves are make before break. A pressure relief valve between each pump output and tank would solve this but then you may as well put a shuttle valve where the manual valve is and let it do it automatically. The hydraulic high pressure filter is a bit unusual for this sort of use. Normally on simple 12V pumps built into the reservoir ( as on a tipper) a switch on the spool powers up the electric pump, if so this would need disabling while the petrol pump runs to cut wear on the 12V pump constantly blowing off the relief valve .
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World's biggest wood yard?
openspaceman replied to Ontario Firewood Resource's topic in Firewood forum
It keeps out the stain fungus too and strangely makes the milling better. -
600kg of winch on the back and about half a tonne of bomford blade on the front with wheels set out to 8ft helps keep it stable.
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World's biggest wood yard?
openspaceman replied to Ontario Firewood Resource's topic in Firewood forum
Pine logs will deteriorate within one year if left lying but spray water storage meant they were still millable 4 years later after a major windblow. -
World's biggest wood yard?
openspaceman replied to Ontario Firewood Resource's topic in Firewood forum
https://www.forestresearch.gov.uk/documents/6583/FCBU117.pdf -
'cept my 1124 has a 4.5tonne-meter grapple loader and twind 4 tonne winches Makes sense to me
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World's biggest wood yard?
openspaceman replied to Ontario Firewood Resource's topic in Firewood forum
To preserve the wood, traditionally they would have dumped them in a lake but when that's not possible they get sprayed. -
No one has come running to buy any of my Counties and that 1474 that sold only had a few hours on the clock. Mine are a bit battered from forestry use. Rob Morgan, who breaks Counties for spares reckoned a private buyer might pay £10k whereas a professional restorer would only offer £4k. Mind I'm winching with the 1124 today and forwarding with an 1164 and grapple loader.
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Are you sure the cylinder is unserviceable. The aluminium pick up from the piston always looks bad but after that is dissolved off the scratches in the nikasil are often not severe. Most of the wear is taken by the piston ring.
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local wildlife (fur,feathers and beasties)
openspaceman replied to Adam Bourne's topic in Picture Forum
Yup, once the wildlife trusts changed their logos from dragonflies to badgers it was the death-knell for hedgehogs, people deliberately running them over doesn't help either. -
Yes I suspect crank seal and probably clutch side crankcase bearing wear
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Air quality improvement from plants
openspaceman replied to kevinjohnsonmbe's topic in Tree health care
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I see some people are deliberately adding 10% coloured water to the E10 and then syphoning off the 81.8% good fuel off the top, so the fact that it absorbs water which sits at the bottom of the tank until it's agitated only becomes a problem if it corrodes something or a globule fouls up the carb. Only the fuel tanks breathe, the storage container shouldn't so water shouldn't get in until the machine is fuelled and left with it in unused.
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That will still be fine in a B&S mower engine sump
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I have a distant recollection that the self mixing stuff had a bit of petrol in it already so you mixed it at 16:1 instead of 25:1. I thing 2t oil has moved on and got much better with the 50:1 oils so would mix this in with chain oil. What say you @Stubby?
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Yes I still use mine occasionally but have to be a bit careful with it as it has started running a bit weak and I haven't got round to seeing why. The 346 I recently rebuilt is my go to saw now and any one of 3 262s which are over 30 years old now if something needs a bit of grunt. I haven't had the bigger saws out for many years, too heavy and too difficult to pull over.
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A shuttle valve will allow either the 12V or the hydraulic pack to take the strain Shuttle valve - Wikipedia EN.WIKIPEDIA.ORG
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Peter used to leave me the keys to his wagon so I could move it back and for on the forest road to cut down the extraction distance in the days we hand balled 1 metre pulp onto 28 tonnne artics, I used to get in such a mess that it put me off lorry driving completely.
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My only experience was with a system for 8 flats and that was probably deemed a commercial installation, domestic may not have the same requirement. AFAIK a gas boiler heated the lot up for an hour once a day, no sense in that particular scheme at all and the flats would have been much better off with a gas combi each, probably using less gas overall too. I don't understand why heat pumps are so expensive, they are only big fridges and fridges run for years with no problems.
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Tends to be cheap where there's hydropower, renewable too.
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Will this kill your training business stone dead or are you expecting firms still to send people for training?
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In fact most of the Brighton street trees produce viable seed, I know as I propagated some, and english elm, previously Ulmus procera but now Ulmus minor "Atinia" is an infertile clone. So they will be Ulmus minor I think. Ulmus minor 'Atinia' - Wikipedia EN.WIKIPEDIA.ORG I did fell some wych elm there and assisted while the lads took down the last two between the station and football stadium, they were completely healthy and showed the typical black tyloses in the previous annual rings from having contained previous infections.
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Because they pump heat to a lower temperature than a traditional wet system with radiators but still higher than room temperature they need much more heat exchange area, Floors can be big heat exchangers and only need to be heated slightly above room temperature, as the heat rises, The bigger problem is getting up to the 50C+ for domestic hot water and worse still heating the whole wet system up to 60c+ once a day to combat legionnaire disease bacteria.
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Yes but I thought Ulmus minor had some resistance and don't quite understand why they ringbark stand alone trees, I thought it as to prevent transfer via root grafts/contact.
