Maximum drawbar horsepower
was recorded in second gear with 44.
1981 -- The heaviest wheel tractor that has ever been tested was a Big Bud 525/50 developing 421 drawbar horsepower
and weighing 51,920 pounds (23,364 kilograms).
When Challenger introduced the MT875B track tractor at 570 horsepower, it set the benchmark for power in an agricultural setting and broke all existing records for drawbar horsepower
," says Doug Griffin, Vice President of Marketing for AGCO North America.
Huber engineers estimated with a Continental H243 gasoline engine running at 1,600 rpm, the tractor would have developed drawbar horsepower
For average depth stubble plowing (relatively light duty), about five drawbar horsepower
are required of a tractor for each 14 inch bottom or blade of the plow.
That means that five to nine percent of the drawbar horsepower
on a comparable wheel tractor is lost to slippage.
Kerosene was used as fuel, and the tractor's drawbar horsepower
was almost 53 hp, far above the rated 40.
Today there are four "categories" of three-point hitches, based on different ranges of maximum drawbar horsepower
5 drawbar horsepower
and 19 at the belt with the engine running at 1,100 rpm.
It had 52 drawbar horsepower
and sold for $1,350 in 1940.
These machines offered 10 and 15 respective drawbar horsepower
and are extremely rare today (particularly the 15-30 version).
With 20 drawbar horsepower
and 35 belt horsepower, the new model was well-received by the market and set Avery on its course for the next 13 years.