LEEVENSPARK

Four-wheel Steering (4WS) The front-to-rear wheel alignment plays a significant role in the directional stability of a vehicle. Often the lack of stability causes a dangerous drive. This is clearly observed when a car has worn suspension bushes. Up to the mid-1950s the majority of cars suffered from over-steer, mainly due to the uncontrolled movement of the rear axle caused by spring deflection which is initiated by body roll. The problems associated with an over-steer characteristic are now well understood. To improve stability, most cars nowadays are designed to exhibit under-steer characteristic when driven at high speeds. One step in obtaining an under-steer characteristic is to use body roll movement to steer the rear wheels. This is achieved either by misaligning the rear axle or by changing the geometry of the suspension system in the case of the car fitted with independent rear suspension. Although under-steer condition improves stability of the vehicle, it increases the driver

China’s first generation of supersonic aircraft J-6 out of Air Force formal series                                          In the morning, made out of the Air Force J-6 fighters formal establishment sequence; J-6 fighters to China’s own production of the first generation of supersonic fighter planes, from the first aircraft delivered in 1964, discontinued in 1986, was the largest number of Chinese air force, the most service time long, the largest combat aircraft shot down supersonic fighter jet made. From 1964 to 1968, J-6 fighter aircraft were shot down more than 20 different fighters. J -6 design features, performance data and introduce the main model J -6 is the Shenyang Aircraft Manufacturing Company manufactured single-seat twin supersonic fighter, 60′s and 70′s the Chinese Air Force’s main fighter, can be used for homeland air defense and air superiority to win the local front, but also to support the implementation of some of the task. J -6 aircraft is based on the former

For more than 80 years Machine Design's experienced team of engineering degreed editors have provided the news, applications, in-depth technical information, new products and vendor information engineers need and trust. It is written and edited for the individuals who perform a design engineering function. It provides technical information in the following areas: 1.Design and development, how-to, in-depth technical articles 2.Current technical news coverage 3.Ideas, examples of how someone else solved a design problem 4.Personal, professional and management information 5.Commercial assistance by means of new product announcements and manufacturers literature listings Geographic Eligibility: USA, Canada Offered Free by: Penton Media, Inc. Machine Design, Free Machine Design Subscription Subscription