openspaceman

I've often wondered this because the force used to get the tree over is from a different direction i.e. upwards not sideways and i worry that with alot of force you could pop the hinge off. It's fairly easy to see what's happening with simple applied physics and levers. We only need to consider the cases where the tree is not leaning into the direction of fell and heavy branches are moving the centre of gravity of the tree away from the stump to opposite the direction of felling. To topple the tree you just need to move the line of action of the centre of gravity to past the hinge and over the gob or beyond. Say the line of action of the centre of gravity is 1 metre from the hinge and the jack is 30cms from the hinge. To rotate the tree about the hinge the jack has to counter the weight Mkg times gravity of the tree times its distance, 9.81 M Newton metre but the jack is nearer to the hinge so it has to apply this torque from 1/3 metre so it has to supply 3 times this upward force and this is resisted by the weight of the tree and the tension in the hinge. This upward force on the fibres of the hinge is the opposite from which the fibres are normally stressed and worse as the tree moved the hinge is bent and the fibres at the back of the hinge fail in tension earlier than normal as they are pre stressed. Normally the point at which the strain on the fibres exceed their tensile strength is when the tree has moved around 10 degrees but because of this pre stress they must fail somewhat earlier. With a rope the tension in the rope counters the moment of the weight of the tree without altering the stress on the hinge until the tree moves.

Yes I picked up on that but experience from prosecutions in the roofing trade suggests it will be the lace curtain twitchers that send in photos. What comes across mostly is the sheer arrogance of these desk jockeys

Slow learner then 😀

Did you check the ring gap in the bore?

@drinksloe when you are using the jack on a big back leaner, outside tree with all the heavy branches adding to the back weight, do you ever get the hinge failing from the stress that the jack puts on it? I can remember jacking over a big oak on a field edge, it all seemed to be going right, back into the wood, when suddenly the hinge just let go and it went down 45 degrees into the field, a lot of clearing up. I felt that had I used the winch there would have been far less strain on the hinge.

This is something I slipped up on, I was fine invoicing work but once people started paying by electronic bank transfer I failed to spot non payment and the longer you leave a debt the harder it gets to collect.

I thought methane at first and then wondered if they were clearing out a bin with dried sewage solids and it was dusty. There are a large number of historic cases of explosions in dusty atmospheres where the dust was flammable, e.g. flour mills, saw mills. It only needs a shovel hitting a stone and creating a spark. Dung after all is flammable and used for cooking in some parts of the world. I used to demonstrate such an explosive conflagration with a candle in a big coca cola bottle and a puffer from a lens cleaner.

Never seen one but you could make one up with two thread chasers, also at Tracy

I used to buy bits from them 20 years back. Yes the taper might be the best but for the fact it may follow the cross threaded line first. Have you asked @aspenarb if any of his thread repairers are that size?

Was the offer without prejudice? You can always make a counter offer

30 X 1.5 METRIC WWW.TRACYTOOLS.COM

I agree with @benedmonds and @Khriss as long as you have kept pictures and evidence as you have documented above.

I'm confused, are the first two pictures the only samples you have to go on and the final picture an archive picture of what you think it may be? I have not seen a hop hornbeam opened up and it is not a common tree but those first pictures look like a dead piece of sweet chestnut with the stringy bark bast and narrow sapwood. Especially with that light yellow tinge on the outer rings

Looks like there may be a suitable anchor in the wall behind

Brilliant, I've not seen one of those before

engine must run backwards on top one

I've been doing social media for 26 years then ?

Not necessarily, on a tractor I've know the sock filter in the tank to gradually block with a watery gel, gradually the suck from the pump would collapse the sock and the engine would die, leave it 10 minutes and it would run again. It's the warning for either low engine oil pressure or low engine oil level, we'll have to wait and see if @Jase hutch picks up on this.

that must mean OIL and could be low pressure as the oil gets hot or just high temprature. The other symptom sounds a bit like blocked fuel filter.

Greenfinch was always a very rare sight and strangely years we saw siskin we never saw goldfinch or vice versa. We did have a solitary goldfinch singing from our tv aerial this summer but he never did come down to fed that we saw.

something just brushed past my head making a strange sssssound

When I last looked several years ago it was part of the oil distributor's code of practice. Not only forked but it has been known for a hot length of scaffold tube to be pushed through to fill a few cans and let the rest run away.

I'm surprised at you; gravity fed is deprecated because of the risk of a pipe failing or tap leaking. This is why bunded and pumped makes sense.

Why not they have them at the circus don't they, and aren't trapeze artists working? ?

I used to see them in spruce plantation when I did and it was the high pitched chirping that would draw my attention before I saw one. I don't think I have seen a firecrest. It's shocking to me that despite having different sorts of feeds and feeders in my garden we have very few birds of any species visiting whereas 40 years ago the hedge was alive with house sparrows and we would see thrushes and blackbirds on the grass, robins would feed out of my wife's hand and bluetits nest in old bits of flue pipe.