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    There is no "industry"

    Here's one for you on the whole mentorship trades knowledge thing. I remember when robotic welding occurred and it went first by rote - master welder does weld machine measures it and copies it and then by breakdown of process parameters followed by fine tuning by iteration/repetition. Sound...
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    Why Is It So Expensive to Cut Down a Tree?

    I forget the exact slant/definition for retrenchment pruning but it used to be an issue of difference between across the pond. I wonder how it fits in.
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    There is no "industry"

    Whip, zip, whir whir whir reel reel reel. Caught one ;) A caution on the arm lanyard. I used to do that free climbing - its the natural go to. But if you slip your whole body weight could put a yank/torque on a joint like your elbow or shoulder, or put a big lever on say your forearm bone...
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    Nerd Alert

    Muggs a deeper dive into wood products prompted by your post. Good stuff but chemistry makes my head hurt. https://bioresources.cnr.ncsu.edu/resources/adhesiveless-bonding-of-wood-a-review-with-a-focus-on-wood-welding/ It's what you call a review or summary type paper. Thank jeebus for those...
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    Nerd Alert

    Insert/Woodstove Burning Noticed something the other day. We went through a dose of -10 to -15C weather and the insert was running nice, burning well and clean, maybe a bit quick. Then in about ten hrs it suddenly warmed up to -2C and the stove, on the same wood, slowed down, threw less heat...
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    45° limbs

    I did the lurker thing for years too before joining. I think big willows have a relative commonality of structure that's easy to picture. 10' clear spans up leaders fits my commonality recollection, if not further. Smooth bark on later thinner stages of growth also rings a bell - those...
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    Why Is It So Expensive to Cut Down a Tree?

    A small percentage of the expensive pricing out there is the I don't want the job over-bids that get accepted, no?
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    There is no "industry"

    You never mentioned your literary arts degree before ;) Lots of bait n hook lines sure to get responses. Well written! You could link in some of your content geared to hard science to yin/yang with rules/rote/generalisation 'human-i-ficial" intelligence (see what I did there? ;) )
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    Used Saws and Blowers Values

    I'd try a % portion of current retail replacement depending on how used or mint they are. As a buyer I'd be willing to pay a good portion of retail for excellent condition used and mid size saws are $1k+ retail in my neck of the woods. BR600's don't go cheap either. Well used, I guess down...
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    Chipper drum failure

    Might be worth a go at really cleaning everything you can get at to check everywhere for presence of any other cracks forming that haven't actually failed structurally, but are beginning. Part of the design of such things is fatigue # cycles life. Perfectly good design maybe but a critical...
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    One Leg Squat

    I warned my son about high stress injuries pumping iron. He got through ok but two of his friends have lifelong gift tendon and cartiledge injuries. Love your knees and they will love you back for decades to come. Put the hurt on them and they'll keep reminding you that you did. Worn out...
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    45° limbs

    Have to admit big willow bark is pretty thick and chunky near the bottom. I guess the question becomes has the tree been pollarded such that its chunky bark right up to the sprouts. If so I'd easily concur with spurs. But you'll impress the hell out of the customer if they see you suspended...
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    45° limbs

    Another thought. If the stems are denuded of tips along their length and only have the epicormic sprout cluster at the top, skip the unwalkable 45 degree fight - put an SRT line in each of the diagonal opposites and spiderman/traverse your way up to each of the two spar tops in turn. I'd say...
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    45° limbs

    Apologies if I've given the wrong advice ie I think you said there are 4 45 deg and implied no central leader. Best I can offer is two lines, base tie SRT opposite leader, use it to control your weight on diagonal leader which you bear climb/inch worm etc up. Wash riinse repeat each corner...
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    Sudden Idling Issues After Cold Weather

    Maybe something sealing less well in the cold? Older harder crank seals? vent/pressure line etc.. hardened carb diaphram harder in cold? My well used 200T runs different in the cold, actually ms260 too. I switched crank seals on a br400 or 420 and it was like I put a new carb on it.
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    45° limbs

    Coming back in/down, don't do a pure bear skid - lower/release yourself on a long lanyard/mini-climb. "do the bear skid" now the song's stuck in my head! Saw him live once in a bar. You could actually come back in like a traverse.
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    45° limbs

    +1. They're punky corky wood often with bad unions. I suggest a central bit bigger lower tip maybe add a girthed sling/biner false crotch to that (around the stem so you're not relying on the union) once you get up there then take a second (mini?) system and fight your way up/out the leaders...
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    Welding and Chlorinated Cleaners PSA

    Quite a few folks on the buzz weld. I came across this quite educational video of how using chlorinated brake cleaner as a degreaser in weld prep can produce fatal phosgene gas that smells different but innocent and doesn't manifest problems till hours after exposure making it hard to...
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    Nerd Alert

    Branch Union TIP Rope Sawing During Climb - SRT This popped up in another post so I thought I'd take a crack at it here. A lot of the data and analysis comes from the SRT Base Tied Tp Forces thread linked below. The branch TIP union is a 180 degree wrap bollard with a tension ratio of 1.4 for...
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    New device from ISC

    You can really see the extra metal in the zigging links in Muggs photos. Strength for the eccentric loading. Symmetry is why the links on the zig zag can be so small. Neat how the rope pinch gets activated SRT and unloaded DRT. It's a 2 speed automatic Powerglide :) a reference for the...

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