In the same four-step example, what is the weight of the radio equipment installed?

• A. 25 pounds
• B. 30 pounds
• C. 35 pounds
• D. 20 pounds

Answer: (C)

In weight and balance, every installed item has a fixed weight that you add to the aircraft’s weight. The radio equipment is one of those items, and its weight is given in the problem data. In this four-step example, the radio package is specified to weigh 35 pounds. That means when you reach the fourth step and include installed equipment, the radio contributes exactly 35 pounds to the aircraft’s weight (and a corresponding moment based on its arm).

So the weight of the radio equipment installed is 35 pounds because that is the value stated for that equipment in the example. The other numbers would only be relevant if the problem described a different radio package or a different configuration.