Coachmen's exclusive Alumicage™ aircraft grade aluminum framed construction throughout the walls and roof, provides a solid and lightweight superstructure.
When used in a water heater, an anode rod attracts corrosion causing products in the water. These products attack the anode rod instead of the metal tank itself. The anode rod should be inspected yearly and changed when it is reduced to about 1/4 of its original size. The rods are used in steel water heater tanks: an aluminum tank has an inner layer of anode metal to accomplish the same thing. Anode rods should not be installed in an aluminum tank.
The canvas or aluminum shade which is mounted on an RV. They may be automatic, in which case the awning is installed on a spring-loaded roll-up, or they may be manually propped up by a pole.
The ratio between the pinion and ring gears in the differential that multiply the torque provided by the engine. It is the number of drive line revolutions required to turn the axle one time. For example, with a 4.10:1 axle the drive line turns 4.1 times for each full axle revolution. The higher the number, the more torque and thus more towing power. However, higher axle ration also mean less speed.