Dynamometer testing antique tractors July 2023. Its fun being able to see the old tractors lug down and work while standing still. And its nice to get a horsepower value to compare to what the tractor left the factory with.
John Deere 70 D
Allis-Chalmers D14
John Deere 60
Massey Ferguson TO-35
John Deere AR
John Deere 430
John Deere G
John Deere R
We are testing at 4900 feet above sea level. I list the HP corrected for altitude using the approximation that for each 1000 feet in altitude you see a 3% decrease in HP. So at 4900, we estimate to see a 14.9% loss.
