tractor for maximum traction

[LD1]

I guess it all depends on what we use our tractors for. For bigtime ag tillage, maybe a little slip is better.

For me towing a trailer of wood through a field, grading out some dirt, doing FEL work, etc. I dont want any wheel slip.

Ballasting so that there is no wheel slip under normal operation of whatever attachment you are running, doesnt mean that the wheels wont slip when resistance is increased as you catch that unseen obstical.

 

[vtsnowedin]

Ballasting so that there is no wheel slip under normal operation of whatever attachment you are running, doesnt mean that the wheels wont slip when resistance is increased as you catch that unseen obstical.

Yes but the stresses the hitch parts come under will be much higher before the tires spin free.

 

[BHD]

the more tire on the ground the more potential traction, that is why duels are used, and Higher HP tractors have larger tires, more foot print,

radial tires vs bias ply tires, the radial tires will squash out more and give a larger foot print, bias ply tires, will not have the traction that a radial will,

but in field conditions one wants some slip,

but if one wants the most traction one most likely will want tracks the latest foot print.

 

[SPYDERLK]

I guess someone may have to educate me. But why would you want any wheel slip if you can avoid it?

There is always some slipping as a function of load. Tiny/negligible at lo load but still a creepy fact.

,,,In the realm of dirt and directional tread you have a situation yielding a range of slip where traction does not drop off with slip and may actually increase. This is made possible by the way AGs inherently jam soil out and backward. The slow slip performs a packing function offsetting the tendency to slip.
,,, Youre certainly losing efficiency tho. Rather not slip ... but could beat buying a bigger tractor.
larry

 

[vtsnowedin]

The ten to fifteen percent slippage has been found to be the most efficient in terms of gallons of fuel + wear and tear per acre tilled. If your farming 1000 acres a five percent improvement in fuel consumption to do the same work is a big chunk to take out of your profit column. To us weekend warriors it probably doesn't matter at all.

 

[dieselscout80]

Unless I missed it no one has said to use the differential lock if the tractor has one. I differential lock keeps power to both rear tires rather than letting juse one tire spin.

 

[vtsnowedin]

Unless I missed it no one has said to use the differential lock if the tractor has one. I differential lock keeps power to both rear tires rather than letting juse one tire spin.

Good point especially if one tire is in a dead furrow and the other is up on wet grass.

 

[Sysop]

I generally use right and left braking for keeping straight in furrows and stop a spinning tire which puts the power to the other tire. I reserve answering traction questions with "diff lock" unless it is to get unstuck.

 

[texasjohn]

thanks you all
if any one have an idea for how can i measure the weigth in traction test please help me

Sounds like you have an academic/college question, perhaps wishing to set up several different conditions and measure the "traction" for each situation.

I know you are not in the USA and likely English is not your first language. Regardless, it becomes very important to carefully define exactly what you are seeking and be very specific and consistent in the definitions used. There are lots of terms used by us all without RIGOROUS definition and consistent use. Consider...

traction
slippage
horsepower
weight
torque
length of pull...as in a tractor pull using a weight sled
force = mass x acceleration
gallons used per hour or per acre plowed

In physics class, students study the COEFFICIENT OF FRICTION, which as I can best understand is what you mean by "traction".....May I suggest you look at this article and determine how it applies to your question regarding tractors.

Standard Friction Equation by Ron Kurtus - Succeed in Understanding Physics: School for Champions

I believe that the best way to measure traction is likely to be some form of weight sled, similar to what is used in tractor pulls.

Finally, I believe that a tracked vehicle has better ground engagement and thus friction/traction than rubber tires.

 

[Baby Grand]

I suspect that when you are getting optimum wheel slippage you won't even be aware that it's happening, unless you measure the distance travelled and compare it to the number of wheel rotations used to complete it x Pi x wheel diameter.

 

[vtsnowedin]

I believe that the best way to measure traction is likely to be some form of weight sled, similar to what is used in tractor pulls.

The trouble with weight sleds is the variability of the surface you are dragging it over. Wet clay will be a lot slicker then packed gravel etc. A fair test would be a tractor pulling on topsoil with about 5% moisture in it similar to what a field is when it is workable. The load should be coming up out of a well and over a well lubed bull wheel. Increase the load on the bottom of the cable until the tractor can't lift it off the bottom of the well. The last load it could lift would be its draw bar pull. Once started the tractor should be able to pull any load all the way to the top of the well if the ground is uniform.

 

[vtsnowedin]

I believe that the best way to measure traction is likely to be some form of weight sled, similar to what is used in tractor pulls.

The trouble with weight sleds is the variability of the surface you are dragging it over. Wet clay will be a lot slicker then packed gravel etc. A fair test would be a tractor pulling on topsoil with about 5% moisture in it similar to what a field is when it is workable. The load should be coming up out of a well and over a well lubed bull wheel. Increase the load on the bottom of the cable until the tractor can't lift it off the bottom of the well. The last load it could lift would be its draw bar pull. Once started the tractor should be able to pull any load all the way to the top of the well if the ground is uniform.

 

[SPYDERLK]

Oh where is that cliff when you need one? ... You could rig it with a good pole and pulley system tho.

Any planted telephone poles you could sneak up on.

 

[vtsnowedin]

Oh where is that cliff when you need one? ... You could rig it with a good pole and pulley system tho.

Any planted telephone poles you could sneak up on.

Being practical about it (I know not the usual TBN course of action) you would just put a strain gauge in the cable between the draw bar and the load and just record the max load before the tires break free or the engine lugs down and maxes out.

 

[Sysop]

Being practical about it (I know not the usual TBN course of action) you would just put a strain gauge in the cable between the draw bar and the load and just record the max load before the tires break free or the engine lugs down and maxes out.

And a "practical" strain gauge able to measure high enough would cost? Tractors meant to pull can pull with massive amounts of force (many tons of force). I'm thinking a way to gauge it would probably be practically a fortune. hehehe

 

[vtsnowedin]

And a "practical" strain gauge able to measure high enough would cost? Tractors meant to pull can pull with massive amounts of force (many tons of force). I'm think a way to gauge it would probably be practically a fortune. hehehe

Strain or load gauges are pretty common on cranes today and your not going to wear one out pulling on it with a CUT or even a utility tractor. Shouldn't be hard to do at all.

 

[Sysop]

How much does one cost?

 

[vtsnowedin]

How much does one cost?

About $2200.
Chatillon CMA Crane Scale - CMA-22K-N | Scalesonline.com - Cheap Industrial, Digital and Weight Scales

 

[Sysop]

Sorta spendy... I'd imagine there are a lot that can create more than 22,000lbs of force though. That is to weigh a static load, I don't think it would handle being pulled on.

 

[vtsnowedin]

Sorta spendy... I'd imagine there are a lot that can create more than 22,000lbs of force though. That is to weigh a static load, I don't think it would handle being pulled on.

Being pulled on is what they are made for. makes no difference up and down or side ways. And not many CUTs weigh over 22,000 and your not going to pull more then your weight unless your wheels a steel cogs running in a steel rack. I'm sure if you want to test the big AG tractors weighing 100,000 plus somebody makes a gauge to do that job for quite a bit more money.