Question 2: What does downhill mean? In racing terms, slowing down means driving down the hill, faster than anyone else. Among them, a series of technical actions such as drifting and toe-following are used.
Staring at the white is accelerating downhill.
Question 3: What do you mean by the number of falls of the climbing rope? What is the fall factor that plays a role in the total number of falls? How to calculate? What is the length of the general climbing power rope? It is a plunge, for example, when a pioneer climbs, it often causes a plunge. Because the power rope is malleable, it can eliminate the power of diving while stretching. Generally speaking, we take the diving with the gallbladder height exceeding 2 meters as the diving base point (you can understand it as bungee jumping). Generally, the imported power rope marked 12 times is safe, but it is far more than that. People who used to be Niu X fell more than 270 times (50 meters high, which is simply for bungee jumping). Of course, the last time the rope failed, this guy died! The power rope for rock climbing is generally 10.5MM in diameter and 50-60 meters in length. BEAL from France is recommended. Don't play with the rope made in China. .....................
Question 4: What does DH mean when cycling downhill? You studied English, didn't you? You can understand it at a glance.
Question 5: What is nylon rope? As the name implies, nylon rope is a rope made of nylon material. Nylon is called polyamide chemically, and its English name is polyamide (PA for short). Nylon is widely used and can be made into hard products and soft products with different properties. Its characteristics and nomenclature are determined by the specific number of carbon atoms in the synthetic monomer. Used for nylon rope, the fiber yarn made of nylon chips is processed through a series of processes. There are two kinds of nylon fibers: nylon 6 and nylon 66, commonly known as single 6-filament and double 6-filament. There are many domestic manufacturers of single 6-filament yarn, which are widely used and relatively cheap. Because one of the main components of nylon 66 filament raw materials is still blank in China, the cost is high and the price is high. The difference between single 6 and double 6 is that the heat resistance and wear resistance of 66 material are relatively high. There is little difference between them in tensile strength. Therefore, the double 6 material is generally used for ropes with high technical requirements, such as starting rope (a kind of rope used for starting small general machinery), climbing rope, safety rope, traction rope, industrial lifting rope and so on.
Edit this paragraph to compile nylon rope.
Although the early nylon rope is superior to the rope made of natural fiber, it is hard, has high friction and good elasticity, and is very inconvenient to use. Woven nylon rope is gradually replaced by woven nylon rope, which is a kind of synthetic fiber rope specially designed for climbing. Modern braided nylon rope is divided into core wire and rope sheath, and the core wire in the middle is parallel or braided nylon wire, which provides most of the tensile strength and cushioning effect. The outer layer is wrapped with a smooth braided nylon rope sheath, which is mainly used to protect the rope core. Woven nylon rope retains the characteristics of nylon rope, and eliminates the shortcomings of kneading nylon rope-rough and hard, too much friction and too good elasticity. At present, nylon rope is the only mountaineering rope approved by UIAA. The composition of rope, the strength distribution of rope skin (braided) and rope core (twisted) is about one-third of that of rope skin and two-thirds of that of rope core. Rough rope skin, thicker, will increase weight and wear resistance; The rope skin is smooth, thin, light and not wear-resistant. Choose a more suitable rope according to the situation.
Edit the classification of nylon rope in this paragraph.
There are many opinions about the classification of nylon rope. The following are several common classifications of nylon ropes on the market. Nylon ropes in the market are mainly divided into the following categories: AL series starting rope BL series weaving tripod CL series marine rope DL series traction rope EL series lifting rope FL series solid rope GL series mountaineering rope HL series safety rope IL series paper drawing rope JL series triple rope KL series special rope mountaineering nylon rope can be divided into power rope (nylon 6) and static rope (nylon 66) according to different uses. Power rope is suitable for projects that may fall, such as rock climbing and mountaineering; Because the ductility of the power rope is needed to absorb the falling energy and reduce the injury. Static rope is suitable for downhill, aerial work, hole exploration, etc. Stable. Static extension of static rope: 2% to 3%. Static elongation of power rope: 6% to 8%; Dynamic expansion, up to 3 1%.
Question 6: Why is downhill mountain biking called "DH"? Need a professional and detailed introduction. It is said that it is upstairs and below the mountain.
If you want to introduce mountain bikes,
Mountain bikes are divided into XC, AM, France and DH.
Generally, XC is a hard frame, that is, the frame has no shock absorption, and the last three are usually shock absorption frames.
However, XC can use soft frames and AM can also use hard frames, which is relatively rare.
The damping stroke of XC and AM is usually 80- 120, FR is usually above 120, and there are also 120, and DH is generally 160-200, in millimeters.
In fact, there is no strict boundary for classification. In short, XC is the lightest, with low strength and low price, while DH is the heaviest and with the highest strength. XC is generally used for riding uphill, but downhill is not necessarily as cool as the latter three. AM can also be used for uphill, the slope below FR is the main nail, and DH should be used for downhill.
The most important parts of mountain bike are frame and front fork.
Externally, the frame can be divided into two types: soft and hard, and the soft one is with shock absorption. Of course, there are differences in geometry, damping structure and weight.
The front fork is equipped with shock absorption, because it is very important to ensure that the front wheel fits the ground when off-road. Of course, some people use hard forks to install so-called high-speed mountains, not mountain bikes.
Then the wheels. Wheels in the mountains are not so important. It's just a matter of strength and weight. Of course, you can't go cross-country with bad wheels, which may cause an accident.
Transmission and speed change generally have three toothed plates, followed by 6- 10 flywheels. Now all the 6-speed ones are gone. I think the 7-speed ones are all low-end goods, which are not common. 89 speed is the mainstream, 10 speed is a new thing. 10 speed at the same time, the XX suite of SRAM has two toothed plates, which can be reduced.
Nothing important was left.
About the brand
SHIMANO is a Japanese bicycle parts manufacturer, which is very good at transmissions and variable speed brakes, and also produces things like wheels and axles.
SRAM, an American company, was originally specialized in variable speed, which was similar to Shimano's grade. It bought TRUVATIV, which produces dental tablets, and now it has a transmission. It acquired Avid, which makes brakes, and ROCKSHOX, which makes front forks. Basically, it just produces more forks than Shimano. Its fork is awesome, and it also makes wheels and shafts, which is not so good.
Forks are also made by Shantu, Manitu, Fox, Magula and DT, among which the last three are better.
In fact, this DT is mainly made of wheels. There are also fulcrums, MAVIC, and many road wheel manufacturers, so I won't write them here.
Shelves, Giant and Merida are all over the street. Giants are actually very good, of course, there are many higher-end ones, such as TREK, YETI, SPECIALIZED...YETI specializes in mountain giant cattle X.
That's about it.
Question 7: Dan? Ottoman immortal Dan O *** an Gambali and Fritsch heard the countdown of O *** an from the phone, and then the wind when they fell. They have used O *** an's braking device for bungee jumping many times before, so it is conceivable that this is a fall before bouncing. O *** an has used this unique protection system consisting of climbing ropes, pulleys and protection points for thousands of times, and has formulated a set of detailed inspection methods to ensure the safety of personnel and equipment. However, on this cold night at the end of June 1 1, he seemed to be in a hurry: he hesitated twice and then jumped from an angle he had never tried before. The whistle of the strong wind lasted for eleven or twelve seconds on the phone, which exceeded the known falling time limit of Fridge and Gambali, and then the phone was disconnected. No problem, Gambali thought. He imagined that due to the impact of the rope starting to rebound upwards, the mobile phone bounced off O *** an, rolled in the wind, drew an arc and fell to the ground. Gambali dialed the phone back and left a message saying, "This is terrible. We're on our way. Call me back and tell me how to get there! " At the age of 35, Dan O 'Ann has become very famous in the circles of extreme adventure sports in the United States. In recent ten years, his peculiar specialty is jumping off a bridge or cliff under the protection of climbing ropes, sometimes for commercial TV, and more often for pure experience. He often appears in magazines and TV ―― with long black hair and a strong figure floating in the air. Many people think that O *** an's intentional jumping off a building is reckless and crazy, and it will eventually turn into a disaster. 1996 published a short and critical article entitled "Really quit being stupid" in January, which started his rock climbing career. He lives in Cave Rock, an arched rock wall on the south bank of Lake Tahoe. He tried all kinds of difficult routes there, although he fell down again and again. After graduating from high school, O * * * Ann stayed in Yosemite for several years. He lived the life of a lost teenager-staying in the rock field during the day, sleeping in the open air at night, begging for food, earning enough money by working as long as he can continue climbing, staying away from telephones and mailboxes for a long time, and not having to bear the responsibility of ordinary people. In the mid-1980s, he returned to Lake Tahoe to continue rock climbing and worked intermittently on construction sites. He broke up with his girlfriend after having children. His friends call him "Darno Time" because he is a few hours or days late. Because of all kinds of troubles caused by O *** an, his mother nicknamed him "Danny I forgot" when he was a child, such as persistent unpaid speeding tickets, unregistered vehicles and broken stairs in his small and messy house, even though he was a skilled carpenter. "I'm disappointed because he doesn't care about these things." His father Les O *** an is a Japanese-American and a retired policeman. "I finally told him that if he went to prison for not paying the ticket, I would not bail him out. He never had much money; He benefited little from this adventure. He usually only makes money for his daughter Emma and pays his bills, including hospital bills. Bail o * * an often falls on his friends, many of whom are rock climbing enthusiasts like O *** an, and many people live a normal adult life, but they are attracted by O *** an's natural nature. In the late 1980s, Ao * * An was famous for rock climbing and ice climbing, especially unarmed unprotected rock climbing. Rogarsky, who often treats minor injuries such as broken ribs and ankles, often procrastinates, while Ohan comes back with some small gifts such as elephant armor and shoes from several sponsors. 1989, Dongyan, Ou * * * An climbed a route with a difficulty of 5. 13. He called it the Phantom Lord, and he fell over 50 times. In the process, he found that falling excited him more than climbing. " "I don't know why," said rogalschi. Probably due to the appearance of several French climbers, the first climb completed a route with a difficulty of 5. 14, which took O *** an a year to complete. Since then, he has gradually moved away from rock climbing and become more and more >>
Question 8: How to protect yourself when playing the game of falling rocks? 1. Make sure the equipment is safe and reliable.
Please fasten your seat belt.
3, the instrument does not leave the body. .
4, the application of hip down during the descent, control the descent speed. Try to keep your legs perpendicular to the rock wall, straighten your knees, lower them in pairs, and keep your upper body parallel to the rock wall. Don't let the whole body fall down in a standing position, which will easily lead to rollover and fall on the rock wall. Try not to jump too fast. 5. Take out the rope after the end. When going down to the bottom, try to squat down, let the rope walk for a distance, and then stand up and handle the rope.
Question 9: The connection between the main rope and the safety belt in rock climbing 1. Conventional rock climbing does not require a riser. This way of yours is a disguised SRT+ hand-foot-assisted ascent ― think about it, people are talking about pioneer climbing, and the main rope was still hanging around your waist before you went up. Where do you hang your riser?
2. The article is correct. For pioneer climbing, pioneer climbing is the next protection point. I'm afraid that the main lock will be caught by the rock wall when falling, because not only the main lock, but also equipment such as figure 8 and ATC are not allowed to fall and touch, so the main rope is directly connected to the safety belt. That's right!
3. If the pioneer climbs up and the climbing behind is suspended protection, you can connect the safety belt with the main lock and then hang the main rope.
But no matter how you climb, you don't need a riser.
Question 10: What is a fall? In his 30 s, he hasn't played enough.