Glad you both are impressed with your Cub's ability in plowing snow. This is something that I have learned over the years is truly impressive. Provided you take short cuts the Cub can plow most snowfalls except those that are very deep - say in the 12-24" range that is kinda wet. A number of our members have experience with plowing rather deep snow as well and they do it regularly. A well tuned Cub is key to this as well as a properly configured and installed blade.
Most folks can be fooled by the term tractor as a tractor can be defined as a machine that is capable of towing implements or trailers. This leaves huge leeway between a Lawn Mower and a Highway Tractor or a Diesel Electric Locomotive
One of the biggest areas where people today are confused is the term Horse Power.
Horsepower (hp) is the name of several units of measurement of power, the rate at which work is done. The most common conversion factor, especially for electrical power, is 1 hp = 746 watts. The term was adopted in the late 18th century by Scottish engineer James Watt to compare the output of steam engines with the power of draft horses. It was later expanded to include the output power of other types of piston engines, as well as turbines, electric motors and other machinery.
Many of the newer Lawn & Garden tractors (ridem's) are pitched to the buying public with large HP ratings when in reality the ratings are not all that accurate. For that vast majority of applications HP in expressed in terms of Peak HP achieved on a test bench under no load which is an unrealistic test. As soon as you load the engine, the HP decreases exponentially.
During the Nebraska Tests where the Cub was determined to have between 9 and 12 hp +/- (over a number of tests during the production life of a Cub) - the HP determination was made by the amount of work the tractor could produce as compared to 1 horse or more. In the case of a Cub that is the power of 9 draft horses. Googling Drawbar HP
will give you all the information you need. A team of horses could do a fair amount of work in an hour but were no comparison to a tractor which provided a substantially more ability to work for less cost.
2.1 Horsepower from a horse wrote:
In 1993, R. D. Stevenson and R. J. Wassersug published an article calculating the upper limit to an animal's power output. The peak power over a few seconds has been measured to be as high as 14.9 hp. However, Stevenson and Wassersug observe that for sustained activity, a work rate of about 1 hp per horse is consistent with agricultural advice from both 19th and 20th century sources.
Surprisingly Drawbar Horsepower
measurements apply to more than tractors which I did not know
When it comes to Lawn Mower Horsepower Measurements
- a number of interesting articles pop up such as - Familiar Horsepower Rating No Longer Standard
There is a whole raft of articles on Horsepower and how it is measured. Certainly will provide interesting reading for those who are well ...
To a manufacturer, marketing is king - whatever it takes to sell your product which is why the buying public need to be educated on what to look for and an understanding of the basics.