jbadman said:
kubotakid said:
jbadman said:
Any consideration to the cyl rod end being fastened in a welded to frame, "clevis" bracket? I envision the end and/or bolt being stretched or bent or broken off. Also, a circuit cross over relief at the cylinder to protect the frame overall. The leverage of the outer blade edge catching a curb might ruin your good work. Looks like a really nice setup otherwise...
jb, I not concerned with the bolt bending breaking or otherwise, Do you realize its 3/4 dia?
If I were to spec the cylinder for this application it would have 5/8 swivel ends not 3/4. The cylinder mount itself is 3/8 thick! Its "over built" just the way I like it :thumbsup:
As far as the bypass valve, Why add the expence? It would be cool to play with but I dont see any need?
No, I didn't realize it was a 3/4 bolt, it wasn't stated in the dialogue...But I'm interested in the upcoming test results. What assumptions will you use for the test, ie. tractor that has the rear wheels fully loaded with fluid and cast weights for worst case, tire chains, the tractor at working travel speed at a nominal high rate for worst case, running full rpm into a immovable or nearly immovable ground object with a specified frictional push (pushing dirt, hitting hidden buried rock, or curbs, etc) ? How will the spike load distribution across the bolt, rod end, extended cylinder rod, and bracket be measured? Do you anticipate any other weak points in the frame or blade? Like I said, its a nice looking job and I like the idea, but for production or user recommendation I recall you suggesting that this be tested thoroughly... Given the traction the high wheel tractor has, anything can be broken but to what nominal working condition be used for the assumption that represent the group who would want to build or buy this improvement? Just wondering, ... I might be interested in one. Thanks.
jb,
I used seat of the pants engineering for this project. Basically relying on my 40+ years of design and build experince. I use to manufacture a 300 lb all aluminum radio controled vehicle that I designed for horse trainers. I had to provide my insurance co with data for a what if it ran wild event. Even though I sourced the electronics out, I would be first in line if it malfunctioned.
I dont remember the formula, But I remember the results, If you bring a 300 lb object, traveling @ 15 mph to a DEAD stop, It developes approx 6000 lb of force.
Iam running 12 x 16.5 loaded heavy wall R4s on my 466. 150 lbs of wheel weights. A stack of weights on the rear,+-300 lb. the blade, and 225 lb for the opperator. I guestamate 1850 lbs+.
If I reverse the math on the RC vehicle, It was 20.1. @ 15 mph. 1850 x 20 = 37,000 lbs of force. So do I think my cylinder mount will take that kinda force? Yes,. absolutly. The only thing Iam not pleased with, are the welds. My MIG welder let the smoke out, So I was using a stick. And Iam outa pratice using a stick welder. Dont worry about that Iam working on a deal for a new machine.
Here are a few reasons why those numbers are over the top of anything even remotely possable.
1) Top speed wont reach 15 mph, Probably closer to 10.
2)The blade will cushion the impact, I told a prospective GT dealer that If he hit a solid object at full speed, full angle, that the blade would waud up,..or the mount would tear loose from the tractor before my Power Angle works would fail. Guranteed.
3) Any Idiot thats plowing snow at full speed with the trip pin engaged, And rams a curb!!
Will be literarly and figurativly removed from this test :rockon: SO subtract 225 lbs while his A double S will go flying over the hood, And only the resistance of his junk being removed should be considered in the inertia impact figures,.. :headscratcher: :sidelaugh: Ill let you decide how much or little that is :wtf:
You asked me to consider all the aspects of traction, the big tires, especially using chains..While pushing dirt, encountering a stone below surface,etc. And I can tell you with absolute certainty, That available traction figures in compairson to inertia impact figures are irrelovent.
Ill give you an example,.. If I place my truck up against a tree and nail it,..I doubt there would be any damage,. Now,.. If I back up 10 feet and then nail it...you get my point.
I did say that I was going to test this unit before quoting a price for a complete package. But my testing wont be doing any crash testing, I think too much of my tractor :grin: I tell you what,. If you decide you want me to do the conversion on your blade and It fails you,..Ill repair it,. no charge. Feel free to do all the ram testing you wish, In fact Ill give you your money back and fix it for free. I would much rather pay you to tear up your tractor to find any weak links than tear up mine,. :rockon: .
On another note,
I read another post of the broken belly cylinder mount, this one was mjoe7s, And It shed a different light for me on the whole lift rod duties. pt# 33841. Its pretty clear that lifting the blade is only part of the force put threw that assembly.
kubotakid :usa2: