Drawbar pull capability

[LouNY]

Maybe if it was a transplanted Detroit 2 stroke

Then it could be a turbo charged super charger engine.

 

[sportscarclinic]

Speculation is a great way to learn basics. It's fun, too.

I used to wonder if our old 90 hp farm truck would outpull the old JD tractor getting a trailer out of the mud..

For a deeper understanding, the Nebraska Tractor test procedures are worth reading. They've been beating on the subject for a long time.

Among other variables, their pull testing procedures measure: peak and constant HP, pulling speed, tire slippage, and fuel temperature.

Granted, if the sort of comparison you're after is of the 'my tractor will pull more than your tractor' variety, then the all the factors you mention, and many more, will have an impact on who wins. I guess my understanding of the OP's comment seemed to presume something more akin to a standardized testing scenario, where factors like fuel temp, pulling speed (from rest), tire design, etc., would be consistent among the test candidates.

I assume by 'peak and constant' HP in this context, they also perform a sort of endurance test, in other words, loaded pull over distance vs. a maximum pull effort. That also seems like a different sort of testing scenario than what was implied by the OP.

 

[sd455dan]

Granted, if the sort of comparison you're after is of the 'my tractor will pull more than your tractor' variety, then the all the factors you mention, and many more, will have an impact on who wins. I guess my understanding of the OP's comment seemed to presume something more akin to a standardized testing scenario, where factors like fuel temp, pulling speed (from rest), tire design, etc., would be consistent among the test candidates.

I assume by 'peak and constant' HP in this context, they also perform a sort of endurance test, in other words, loaded pull over distance vs. a maximum pull effort. That also seems like a different sort of testing scenario than what was implied by the OP.

my Rhino manual actually lists a version of it for the 504

Traction Force ( with adhesion coefficient being .84 and slip 15%) 17640 (N) Newtons so ~4000 lb force

 

[sportscarclinic]

Then it could be a turbo charged super charger engine.

First time I'd ever heard of a supercharger was when reading the box for a Revell P-38 Lightning my dad built for me when I was about age 5. It was called a turbo-supercharger. Obviously it just means a forced induction device that uses a turbine to drive a compressor, instead of a PTO running a scroll or vane type displacement pump. They all "supercharge" the engine.

 

[sd455dan]

First time I'd ever heard of a supercharger was when reading the box for a Revell P-38 Lightning my dad built for me when I was about age 5. It was called a turbo-supercharger. Obviously it just means a forced induction device that uses a turbine to drive a compressor, instead of a PTO running a scroll or vane type displacement pump. They all "supercharge" the engine.

In the early days I think you are right.

More Recently I would say that the generic term "Supercharged" has been replaced by
Forced Induction, Blown, or Boosted as a generic term.


imo, When supercharged is mentioned on most sites it is taken to mean belt driven off of the crankshaft.
Turbocharged would be exhaust driven. At least when cars are involved.

 

[LouNY]

The two-stroke detroits have all been gear driven super chargers, they were the super chargers first adapted to automotive engines. Then some of them had turbo-chargers feeding the super chargers.

 

[sd455dan]

The two-stroke detroits have all been gear driven super chargers, they were the super chargers first adapted to automotive engines. Then some of them had turbo-chargers feeding the super chargers.

New a guy who had one in a bus. Sure sounded different than say a Cummins with a Turbo.

I missed out on buying a good running MFWD Oliver with one, even had a FEL. Don't need it but sure would be a "neat" tractor to have.

I was thinking about Robert "Paxton" McCulloch as well, he tooled up and offered supercharger kits for the "New" Ford Flat head V8's in 1937 Now that is Hot rodding a High Performance stocker in the early days.

First start of a Ford flathead in many years, sporting a McCulloch supercharger

 

[CliffordK]

Speculation is a great way to learn basics. It's fun, too.

I used to wonder if our old 90 hp farm truck would outpull the old JD tractor getting a trailer out of the mud..

For a deeper understanding, the Nebraska Tractor test procedures are worth reading. They've been beating on the subject for a long time.

Among other variables, their pull testing procedures measure: peak and constant HP, pulling speed, tire slippage, and fuel temperature.

I went to a farm tractor pull in Salem/Brooks Oregon a couple of months ago. An old army jeep tried to do it. It just didn't have the weight or gearing to compete against the tractors, and I don't think it even got started with moving the sled.

So, you have many things to consider including weight, traction, HP, and gearing.

A year or so my mother got the idea to replace her 25 year old John Deere tractor (regular small farm tractor) with a tiny Kubota (sorry I don't have the exact models). My brother got the Deere, so it wasn't lost, but I was very surprised about the shrinkage.

We've tried to pull up a couple of posts with the mini-Kubota. It does really poorly. No power, and no lift.

The last post, we gave up and hooked the chain to my RAM 1500. It pulled the post like it was nothing, despite just lateral pulling and no lifting. The pickup probably has 10x the HP as the Kubota, but also a lot more weight.

 

[LD1]

"Supercharger" is a generic term that includes both belt driven Roots-type and exhaust driven turbochargers.

I have never heard the term supercharger used as a generic term that includes turbochargers as well.

And a turbo charger blowing up is not a common thing at a tractor pull that would make one question the visor being up on the driver. Now throwing a rod, or blowing the head off is another story. Or if it was a IHRA/NHRA track and an "actual" supercharger....thats a different story. Cause it is common for them to blow off the engine.

Merely 'mentioning' weight as one of the factors in a broad discussion that also mentions every other variable is hardly the same as recognizing that it is *the* determinant, at least when comparing equal rear wheel HP under standardized soil conditions. The post I referenced was the first to do precisely that.

Agree to disagree. But the context of this thread is about taking drawbar pull readings from different members all over the country, with different tractors, tires, and soil conditions. So no, in the context of this thread, weight is not "the" determinant factor....because equal RWHP and standardized soil conditions are not a factor here.

 

[Egon]

There was a time tractor pulling ability was rated by how many plow bottoms it could pull.