By Philip Birtles
;de Havilland Comet Srs. 1-4 [Aircraft Profile 108] КНИГИ ;ВОЕННАЯ ИСТОРИЯ Название:de Havilland Comet Srs. 1-4 Автор: P.J.Birtles Серия: airplane Profile 108 Издательство: Profile guides Ltd Год издания: 1966 Страниц:16 Формат: PDF в rarЯзык: английский Размер: 11.59 Мб Для сайта: Мир книгde Havilland DH.106 Comet был одним из первых в мире реактивным пассажирским самолётом. Он первым разрабатывался именно в качестве пассажирской реактивной машины, и стал первым, начав коммерческие полёты, опередив ближайших конкурентов более чем на четыре года. На базе самолета создан морской разведывательный самолет Nimrod, до сих пор стоящий на вооруженииifolder.ru.com zero
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Notice also that there are two large rubber tires in front of the PR; should your robot bump into these, it is possible that the robot could be bumped off course or briefly caught, because the tire surface can be tacky and stick to plastic surfaces. You will definitely want to take a measurement or two that will allow you to determine the proper height (from the ground) that your robot must touch the circular barrel or the pointer ends on the PR’s arm. You must also be able to properly program your robot so that it moves the arm from right to left.
For testing purposes on this second challenge item only, place your robot where the PID would be located and assume that it has successfully disengaged the PID and is now ready to find the PR. 32 CHAPTER 3 ■ CREATING THE POWER REDIRECT Use a combination of measurements on the mat (or floor) from PID to PR as well as visual cues, such as colors or lines on the mat or tape (you are allowed to place tape on the floor; there’s no rule against it). A sensor or two can give your robot the ability to navigate the challenge area and find the PR before attempting to move the arm.
Tackling the PR Challenge The PR is not a difficult model to figure out. In the challenge, the pointers (two orange tips) will be pointing toward the right, and your robot must rotate the PR so that it points to the left. This will simulate redirecting the power obtained from the solar array (see Chapter 4) to Mars Base. There is no danger to your robot from this device other than the possibility that it could get caught up in the structure. Notice also that there are two large rubber tires in front of the PR; should your robot bump into these, it is possible that the robot could be bumped off course or briefly caught, because the tire surface can be tacky and stick to plastic surfaces.
de Havilland Comet Srs. 1-4 by Philip Birtles