Horse Power

I'm used to brake HP measured at the engine.

Don't quite understand what's being measured for drawbar HP.

Thanks,

-Steve

The drawbar HP is the actual pull of the tractor rated in HP, the Nebraska Tractor Test #339 on April 9 to April 18, 1940 in test G (low-gear maximum operating load) showed 12.61 HP pulling 2,236 lbs at 2.11 mph with slippage of 17.33%. Test H for the rated drawbar load indicated an output of 12.8 HP, along with a pull of 1,568 lbs at 3.06 mph and slippage of 6.7%.

Tests C and D are the tests usually quoted by people arguing horsepower and are taken off the belt, these are usually higher that the ones taken at the drawbar.

Hope this helps.

Mike

Roger In Michigan. (Brrr)

Also, if I buy a Bush Hog with say a 40 HP gearbox, Is the Belt HP the same as the PTO HP ??

Thanks again !!

-Steve

SAE brake horsepower uses an engine brake just like on your car wheels, only different. Do a search, the info is out there. There used to be 2 different SAE hp ratings out there, with and without engine accessories (like waterpump, generator ...etc...)

Since hp sells, every manufacturer wants as many hp as the engineers will lie about. Which is why there are various hp standards out there. The Univ Neb tests became the "tractor standard" and braggin rights for tractor manufacturers.

Everyone knows what a horse is, right? Well guess what? A real horse is about 2-1/2 hp, some draft horses like the famous Budwiser Clysdales are about 4 hp. Steven Watts (inventor of steam engine) used mine ponys to define his steam engine power (744 watts = 1 hp and is named in honour of Watts)

Brushog 40 hp gearbox doesn't mean it takes 40 hp to run the brushog, means that if you try to put more than 40 hp THRU the gearbox, you stand a chance of breaking it. This will happen if you are using a big tractor and you hit something with your brushog blade. Most people with big tractors use bigger brushogs anyways.

Yes, there is a SAE hp rating for your N-Engine, about 28 hp (I think)..... ...Dell

Take care

later,dave

And did you know that the reason for state test requirment (called the Croizer Act) was caused by "the other Ford Tractor Company"? A smoke and flimflam opportunist named Ewing outta Minneapolis saw the success of the Model T and started his own Ford Tractor Company named after one of his own employees. Thinking he would make a fortune by selling his Ford Tractor company name to Henry Ford. Henry just loved lawyers, so he called his new tractor company "Fordson". Up-yers sez Henry.

Ref: UNL tests #339, 9N, 39-43, 23.56hp belt
none, 2N, 42-47, 23.56hp belt
#385, 8N, 47-48, 21.06hp belt
#393, 8N, 48-50, 25.77hp belt (increased compression)
#443, 8N, 50-52, 26.19hp belt (sidemount distributor)

Arn't you glad you asked instead of looking it up?..... .....respectfully, Dell

Well, at least that's what the history books say, and what do they know anyway.

And according to my Nebraska Tractor Tests Since 1920 book by C.H. Wendel, there were no tests conducted during WW2 and so the 2N never got tested, the first post war test on a Ford was the 8N. Awww, Wendel probably got it wrong anyway. I think though for the sake of argument I'll continue to use Wendel's information, it sounds so much better than saying "Dell said". At least to me.

Respectfully, Mike

You doubt? Look it up with search.

Don't remember anyone questioning it????

Arn't you glad you asked instead of looking it up?
Besides the the fact we can see your back to makeing new friends in your own special way,..... ... if'n everybody "LOOKED IT UP" well..... ....would'nt that put you out of a job answer'n 90% of all the questions on this here forum?

respectfully,dave

This board is a lot like television, if you don't like the show - turn off the TV. If you don't like the post's - stop reading them.

My .02