Final answer:
The maximum landing weight of the Challenger 650 is approximately 24,200 kilograms or 53,352 pounds.
Step-by-step explanation:
The maximum landing weight of the Challenger 650 can vary depending on the specific model and modifications. However, as of my knowledge, the maximum landing weight of a standard Challenger 650 is approximately 24,200 kilograms or 53,352 pounds.