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Ground pressure is the pressure exerted on the ground by the tires or tracks of a motorized vehicle, and is one measure of its potential mobility, [1] especially over soft ground. It also applies to the feet of a walking person or machine. Pressure is measured in the SI unit of pascals (Pa).
Sidewall deflection is not a direct measurement of rolling friction. A high quality tire with a high quality (and supple) casing will allow for more flex per energy loss than a cheap tire with a stiff sidewall. [citation needed] Again, on a bicycle, a quality tire with a supple casing will still roll easier than a cheap tire with a stiff casing ...
Tires inflated to 7 psi (48 kPa) Rolligon is a trademark name for large, low-pressure tires, designed to traverse the soft ground surfaces of the tundra.The product was invented by William Albee in 1951 after he had seen Inuit using inflated seal hides to drag a heavy boat on shore.
Hover mowers are powered rotary push lawn mowers that use an impeller above the spinning blades to drive air downward, thereby creating an air cushion that lifts the mower above the ground. The operator can then easily move the mower as it floats over the grass.
Dixie Chopper claims to build the world's fastest lawn mowers. The most famous example was the Jet Mower, custom built by Art Evans in 1991 using a 150 HP Solar T62 APU from a Chinook Helicopter. [7] This mower was featured in a 1993 episode of Home Improvement. Dixie Chopper's promotional video includes a brief clip from the episode. [8]
Grasshopper was the first manufacturer to offer dual swing-out levers for their zero-turn mowers (1973) [2] and the first to offer a diesel-powered zero-turn mower (1983). [ 3 ] Grasshopper introduced the PowerFold Electric Deck Lift in 2004, to allow the operator to easily lift and rotate the mowing deck nearly 90 degrees for maintenance and ...
Their mowers are limited to a stock lawn mower engine with a governor set to no more than 3650 rpm and a 10:1 gear ratio. Adult classes are split by running time trials. Time trials are set up like a qualifying run in NASCAR. A-Class is the mowers that run the fastest times. D-Class is the mowers that run the slowest during time trials.
Burnout in the box at Tarlton International Raceway, South Africa Fire burnout, Santa Pod Raceway, UK. The origins of burnouts can be traced to drag racing, where they have a practical purpose: drag racing slicks perform better at higher temperatures, and a burnout is the quickest way to raise tire temperature immediately prior to a race.