Renze
Elite Member
I know what you're talking about, and therefor i assume you got the point out of my calculation and the remark that it doesnt tell the whole picture of forces... I allways lay out a design on gut feeling, then calculate if it generates lifting and breakout forces desired, then check if the chosen section heights can take the strain... Then all i have left to do is fine tuning for weight savings
Just one remark: If you extend the line of the main boom cylinder untill it meets a point perpendicular to the main boom pivot on the swing frame, the effective arm length over which the force works, isnt much: If you pull the backhoe high up, it will have little force. It will have most force when digging deep. I think perhaps it would be better to put the boom pivot point at a slightly bigger horizontal distance to the boom cylinder attachment point, so it gets a bit more lifting force with the boom fully up. When you think it over, you'll get what i mean so i dont have to sketch it out. its the same gut feeling you talk about: when my gut is in doubt i calculate
