Help figuring ballast weight

[oosik]

I know somebody has a formula/rule of thumb for this. What does a rotary cutter sticking out beyond the 3PH seven (7) feet and weighing 1200 lbs equate to in a ballast box right at the end of your 3PH? Its a matter of leverage vs gross weight.

 

[PapaPerk]

Check out my post here....

http://www.tractorbynet.com/forums/showthread.php?t=255645

 

[oosik]

Excellent! I just knew somebody had figured a formula. You may have used Excel but its your formulas and calcs that are plugged in. Thank you.

 

[PapaPerk]

Excellent! I just knew somebody had figured a formula. You may have used Excel but its your formulas and calcs that are plugged in. Thank you.

Yes is a sum of moments formula. I just use excel to make pretty pictures and crunch lots of numbers fast. Lol

 

[oosik]

Well, with your formulas it comes out to around 2250 lbs - which is about what I thought it should be. Now to convert that much weight into a size for a ballast box (the easy part).

 

[LD1]

15 cu-ft of concrete should hit the nail on the head.

I assume your tractor is Cat II, So a 32" wide, 32" high box and 24" length. That will get you about 120 lbs shy of your mark. But you will likely use 120lbs of steel for the box, pins, etc.

 

[oosik]

LD1.
Thank you. Yes, the tractor is Cat 11 - all the attachments, so far, have sleeved pins. I going to be using a spin-off of the design from Hilltop Hillbilly. I really don't need a place to carry tools, chains etc. I have the FEL on the tractor all the time. Got a friend(thank goodness for friends) who will weld this thing up and only charge for the materials. He owns a welding shop. I have a welder but my welds - at times - look more like a pigeon passed my way and this is not something I want falling apart. When this monstrosity is completed I will have pics.