Advanced Terrain Modelling (Modelling Masterclass) by Richard Windrow

By Richard Windrow

The secrets and techniques of top-class terrain modelling are published and confirmed via Richard Windrow, one of many world's best diorama modellers, during this new addition to the winning Masterclass sequence. every thing from medieval castles to the destruction wrought upon sleek towns by means of warfare is roofed during this wide-ranging and obtainable process. discover the problems of constructing an efficient barren region surroundings from the sandstone of Arizona to the wastelands of North Africa. detect the fragile handiwork had to create the barbed cord loss of life traps of No-Man's Land and the frozen desert of Russia in winter.

This number of seasons, environments and old sessions are distinctive in over 2 hundred complete colour step by step photos in order that more than a few modeller's "how to" questions are simply spoke back. Accompanying the pictures is a useful consultant to the fabrics and methods had to create first-class terrain, delivering the basic reference quantity for the army and non-military modeller alike.

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Ever been riding your bike and then slammed on the brakes really hard? How did your body react when the bike stopped? It most likely kept moving forward, in some cases your body, or even the bike, may have been lifted up. When you felt this happening you experienced Newton’s first law of motion. This behavior of objects is called inertia, and it effects your robot’s balance as well. The formula to calculate inertia is simple; its force equals mass times acceleration (F = ma). ■ Note Newton’s first law of motion says that an object in motion will stay in motion and an object at rest will stay at rest unless acted on by an unbalanced force.

Two-Wheeled Robots One of the simplest designs is the two-wheeled robot design shown in Figure 2–20. This consists of two wheels, each attached to its own motor, with some kind of skids or ball casters to help the robot keep its balance. Depending on the game field, these designs can actually do very well in FLL events. Many times, the simple designs perform the best. 37 CHAPTER 2 ■ CHASSIS DESIGN The center of gravity can be a concern with two-wheeled robots just because the wheels tend to be close to the front, and once any attachments are connected, this can cause the robots to fall forward.

The circumference will be the distance that your robot will travel after the wheel has made one rotation, or more simply, it’s the distance around the circle of your wheel (see Figure 2–16). Knowing this information will be very important when we talk more about navigation in future chapters. 14), so C = πd. To determine the diameter of your wheel, simply lay the wheel on a ruler and measure the distance across the wheel at the widest outside part. Figure 2–16. The circumference of a wheel Mounting When mounting wheels to your chassis, it’s important to give your axles proper support.

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