PLT256 PVT
Refer to figure 54. Page 88 in the PDF
<http://www.faa.gov/training_testing/testing/media/LearningStatementReferenceGuide.pdf>
How is the CG affected if radio and oxygen equipment weighing 35 pounds is added at station 43.8? The glider weighs 945 pounds with a moment of 78,000.2 pound-inches prior to adding the equipment.
Explanation
Correct answer: B. Moves 1.38 inches forward and remains within limits. First add the weight of the equipment to the glider weight. In this situation, 35 pounds added to 945 pounds = 980 pounds. To calculate the moment, multiply 35 pounds X 43.8 which equals 1533 to be added to the total moment (78,000 + 1533 = 79533.3). Now divide 79533.3/ total weight of 980 which equals 81.15. The previous CG point was 82.53 which is 78,000.2/ 945. Finally, subtract the new CG from the old CG- 82.53-81.15= 1.38. Finally the chart indicates that 81.5 (which is forward of the old CG) is still within limits.
