#the mongol high heat #
Two tons of sandstone were carried by a 12-horse-powered hand tractor on the rural slope dirt road。
On the 45-degree slope of the countryside, an old, 4-ton free car, humming and humming, could not climb, while a small agricultural four-wheel tractor, with only 24 horsepower, also carried 4-ton cargo, “twirling” seemed to have climbed without much effort。
In the 1990s, the cars behind the 25 horsepower tricycles in agriculture were larger than the big cars, with no effort to draw 78 tons or even 10 tons of cargo in flat places, and five tons of sandstone uphill。
This phenomenon has caused so many foreigners to stare, to be shocked, to wonder what is the mystery of china's little tractor and tricycle's "extreme martial arts"
Before discussing the “mysterious” aspect of a single-barrel diesel machine, let me begin with the concept of “marrow”. The concept of horsepower, in plain words, is how far a horse can move a heavy object in unit time. So, a horse's strength is equivalent to a horse moving 75 kilos of stuff over a second, or lifting it up to a meter. So, the force of a 12 horsepower tractor is equivalent to 12 horses moving 900 kilos of stuff by 1 metre in a second。
On the basis of a single-power load of 75 kg, a 12-horse-power tractor can only pull 0. 9 tons of cargo, but it can actually climb a slope by pulling two tons of cargo; 95 horse-powered cars can load 7 tons of cargo, but old liberation cars can pull four tons of goods “snorts and thumps”; 24 horse-powered tractors can carry only 2 tons of cargo, but in fact pull four tons of goods to climb the same slopes more than 95 horse-powered cars。
So, why are these pony tractors so "cow"? There are a few aspects to the discussion with friends。
In fact, the hand tractors and the small four-wheel tractors of the 1980s and the agricultural tricycle power of the 1990s were so powerful that they used single-bared diesel engines。
So why is a single-cylinder diesel machine more powerful than a big-cylinder motor? Where the hell is a single-cylinder diesel?
In fact, it is not a mystery that tractors, tricycles and cars using single-cylinder diesels differ in their use and in their working methods。
The use of tractors is mainly arable land, so what is needed is force (twice), not speed. The use of vehicles is long-distance transport, which requires both force and speed. So, when designing diesel engines, the first consideration is force (towed gravity), the greater the better, and when designing motors, the first consideration is speed, the faster the better。
The gravitational force of the single-cylinder diesel machine is large because it starts to burn oil at the end of the engine's compression course, burning at the same time, so that the turn speed is relatively slow, the combustion time is longer, and the revolving radius of the diesel engine is so large that the power arm is longer. According to the leverage principle, the longer the power arm, the greater the twisting of the axis, the greater the force generated and the greater the pull。
In fact, the simple point is that the faster the force is, the less the pull, the slower the pull, the greater the pull, which is why a vehicle has to climb down a slope。
In any case, single-barrel diesel engines are not mysterious enough to pull a lot of gravity, mainly because of the low speed of engine design and the low gravity of the vehicle。
