Can anyone suggest a good jigsaw blade for ripping thick (4 inch) timber?

[Tinker]

it is all nasty stuff to get into lungs, eyes and/or moving parts of machinery
Tinker

 

[threesixright]

The Trion blade made short work of any cuts across the grain, leaving a good straight, perpendicular cut.  But I had great trouble using the saw to cut along the grain direction (in the direction of the axis of the post).  It was reluctant to make any progress. When I tried pushing harder the blade heated and smoked, so I quickly gave up forcing the issue.  I tried various amounts of pendulum action, but it made no obvious difference.  Eventually I finished the cuts along the grain with a hand saw, though that was also hard work as I do not have a proper rip saw.

Het Mark,

Having made any progress? I have exactly the same

 

[Jiggy Joiner]

I think that’s a big ask of a jig saw, where as a bandsaw would make light work of it, even a reciprocating saw with a suitable blade would be a better choice than a jig saw.