/ L5030, increase stability by widening front end tires??? Not sure, difficulties found
#11
OP
texasjohn
Super Member
Best discussion of stability I've seen...excellent.
What I'm doing is using a dirt buggy, maybe called a dirt plane, draw bar attached to enlarge a dirt tank. You lower a ground engaging blade, pull forward filling a 3 cubic yard bucket as full as possible, then lift the blade turning the device into a trailer. I am getting between two and 2.5 CU of dirt on average per pull. I lose traction and have to feather the blade up and down during the pull to maintain forward motion and force dirt into the bucket. Then drive to dump location and dump the dirt and return to dig site. Along the way, to and from, there is uneven ground and slopes to navigate...not extreme and I always do it slowly to keep centrifugal force under control.
The paper makes it obvious why a sharp turn makes tractor more tippy....takes a wide front end and moves it more toward the tricycle type front end...narrows the COG stability base line. Further, in my case, in order to get maximum traction from front drive, when I'm pulling straight forward, I'm carrying a load of dirt in the FEL all the time. This does improve traction significantly, at a penalty of moving COG forward, closer to the edge of the COG stability base line.
Being safety aware, that's why I am interested in widening the front stance.
Kuboman, I'm interested in your comment re exponential stresses. Do you have an additional explanation about this? I understand the arc described by the front wheels during a turn. Seems to me that the stresses are as follows..
Rotational from the 4 wd...pulling forward... seems to me that this stress is the same regardless of tire positioning or turn radius.
Rim is bolted tightly to the axle so torque stresses are applied at the same point, reversed or not.
I'm just having a hard time understanding where the exponential stresses are coming from. For purposes of discussion, assuming a 1 foot wide tire encounters a 1 lb stress on its outer edge, then this is a 1 ft/lb stress seen at bearings. Repositioning that same tire such that it is now 2 inches further out from the perceived stress point this turns into a 1.2 foot/lb stress as seen by the bearings, seals, etc...I must be missing something, this seems linear to me.
Note, I'm not hardnosed about this...just wanting to get the most from my tractor under maximum safety conditions...can easily stay with old way...it's just that I've seen numerous discussions where people turned their front tires and this is the first time I've seen serious negatives expressed in 7 years of watching TBN.
What I'm doing is using a dirt buggy, maybe called a dirt plane, draw bar attached to enlarge a dirt tank. You lower a ground engaging blade, pull forward filling a 3 cubic yard bucket as full as possible, then lift the blade turning the device into a trailer. I am getting between two and 2.5 CU of dirt on average per pull. I lose traction and have to feather the blade up and down during the pull to maintain forward motion and force dirt into the bucket. Then drive to dump location and dump the dirt and return to dig site. Along the way, to and from, there is uneven ground and slopes to navigate...not extreme and I always do it slowly to keep centrifugal force under control.
The paper makes it obvious why a sharp turn makes tractor more tippy....takes a wide front end and moves it more toward the tricycle type front end...narrows the COG stability base line. Further, in my case, in order to get maximum traction from front drive, when I'm pulling straight forward, I'm carrying a load of dirt in the FEL all the time. This does improve traction significantly, at a penalty of moving COG forward, closer to the edge of the COG stability base line.
Being safety aware, that's why I am interested in widening the front stance.
Kuboman, I'm interested in your comment re exponential stresses. Do you have an additional explanation about this? I understand the arc described by the front wheels during a turn. Seems to me that the stresses are as follows..
Rotational from the 4 wd...pulling forward... seems to me that this stress is the same regardless of tire positioning or turn radius.
Rim is bolted tightly to the axle so torque stresses are applied at the same point, reversed or not.
I'm just having a hard time understanding where the exponential stresses are coming from. For purposes of discussion, assuming a 1 foot wide tire encounters a 1 lb stress on its outer edge, then this is a 1 ft/lb stress seen at bearings. Repositioning that same tire such that it is now 2 inches further out from the perceived stress point this turns into a 1.2 foot/lb stress as seen by the bearings, seals, etc...I must be missing something, this seems linear to me.
Note, I'm not hardnosed about this...just wanting to get the most from my tractor under maximum safety conditions...can easily stay with old way...it's just that I've seen numerous discussions where people turned their front tires and this is the first time I've seen serious negatives expressed in 7 years of watching TBN.
