OUCH ! That hadda' hurt !

[DanG]

I think it was the log volume calculator I was using. On the small logs, I was unsure if we were talking board feet or cubic feet.

[Jeff]

Log volume output in doyle scribner and international would be Board foot. Only time a volume is cubic ft is when we state that it is.

[L. Wakefield]

Doesn't the weight on the boom depend on the extension and degree of vertical that the boom is oriented?

   Tom, if I'm right, the weight doesn't change unless you change gravity (take the tree to the moon..)- but the torque on the boom will definitely change depending how the tree is rigged.  lw

[Bro. Noble]

LW,

That's what a guy might think at first -------a log's weight stays the same regardless of the length of the pole that picks it up etc.  That Eienstein feller claimed that if you make something travel real fast,  it changes it's size or weight or somethin.  I'm pretty dubious of that one too.  Just how the heck ya gonna weigh or measure something going so fast ya can't see it?

I do know for a fact that you can catch a 10 pound punkinseed on a fly rod and   retrieve it in a dip net and the weight shrinks to almost nothing :-/

[Tom]

Yeah, I know you're right LW.  I misappropriated my definition. :D    It's apparent weight that was my concern and you are right, that is properly defined as torque.  What was coming to mind was the 9.5 pound M-1 that my drill sargent had me hold at arms length until I could no longer hold it there.  I could still hold it next to my body so my mind told me it was heavier out there at the end of my extended arms.  If I could have convinced myself that it weighed only 9.5 lbs in either place I would have been the Hero of the company because I could have held it extended for a lo-o-ong time. :D :D  You cause all kinds of problems at the end of the lever when you move the fulcrum :P

I'm going to bring some gravity home with me one day and test this : :-/ :P ;D

[Wes]

LW,
The weight on the boom is the weight of the load,sling and hookblock,That doesnt change during operation.However the weight on the boom hoist cylinder does change during operation as you stated,with the boom length and boom angle.
Wes.

[fencerowphil (Phil L.)]

Here are some pictures of the offending Post Oak and its victim.   They are courtesy of Ernie Hibbert, who likes to watch me do stupid things, such as cut up trees with a chainsaw mill.   Hope to add a couple more shots of the crunched house later.
Phil L.


             GET READY


              GET SET


               GO


               FINALLY READY TO COOK!

[Viking]

neat, i know how often people rip with chain saws, i just have never seen it.

[ADfields]

Thats a cool feed system you have! ;)   You just lag it to the end of the log?   What do you do when you get the saw to the end with the ropes?
Andy

[fencerowphil (Phil L.)]

Hey Andy!

In the first photo you may have noticed a DeWalt rechargeable in my right hand.  I was screwing the "yoke" to the end of the log, placing it below the level of the cut.  When I got near the end of the log, I moved the wench with its spiked base to the nearby stump and kept cranking from there.   The alternative to this stump trick is to bump the wench assembly free, lay it aside, and push the saw the rest of the way through the cut by hand.   Pushing is tough on a tree like this, especially when making a 13" thick cut.  (Post Oak is a demanding species.) The Granberg frame wants to rack;  it gets ahead of where the saw is and tends to bind.  In addition, the bark of Post Oak is thick and deeply fissured, causing the thrust skids on the mill frame to fight with you.  Much better to pull at the bar level as does this wench idea.  This cut ran from 27" to about 30"

Special thanks to the book,  Chainsaw Lumber Making by Will Malloff.    He loved lags.  I love big deck screws.  Excepting that detail, the yoke and wench assembly are direct copies of the design presented in the book.  The Era detergent container caddy and dispenser system was my "cheapskate" idea.  It just sits there for the ride, sending a stream of water and Pine Sol.  ;D
Phil L.