Design Flaws
The Crusher's 175 millimeters (6.9 in) tires proved to be too heavy for the 3 cubic centimeters (0.18 cu in) engine. Each wheel and tire weighed between 500 to 600 grams (18 to 21 oz). A set of four wheels and tires weighed over 2 kilograms (4.4 lb), the weight of an entire on-road car, and bringing the total weight of the truck to 5.7 kilograms (13 lb). Team Associated's Monster GT, has tires with the same dimension, but they weigh much less. Simply by installing Monster GT's tires, Terra Crusher's weight problem could be readily remedied, as TNX in recent years have proved. Its 3 cm³ engine was slightly bigger than the 2.5 cm³ engine of T-Maxx; however, that increase was not sufficient to overcome the doubling of the total mass. Immediately after the release of Terra Crusher, it became evident that the truck's performance suffered because of the weight of massive 175 mm tires and lack of power from its 0.18 in³ (3 cm³) engine.
In addition, L-shaped exhaust manifold decreased the efficiency of the RC truck's two-stroke engines. Explosive exhaust should go to the end of the tuned pipe and bounce back into the combustion chamber, stuffing exhaust back into the chamber to increase power. However, Terra Crusher's L-shaped manifold shape hampered the effectiveness of tuned pipe, further weakening the engine's performance.
Read more about this topic: Tamiya Radio Controlled Nitro Vehicles
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