If engine anti-ice is activated and cockpit door gunner heater is on, by how much should the maximum Q available be reduced?

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Prepare for the Utility Helicopter 60 Black Hawk UH-60S Exam. Utilize flashcards and multiple choice questions; each question includes hints and explanations. Gear up for success!

Multiple Choice

If engine anti-ice is activated and cockpit door gunner heater is on, by how much should the maximum Q available be reduced?

Explanation:
When you have engine anti-ice and the cockpit door gunner heater both on, the engine is carrying additional loads from bleed-air to anti-ice and from the heater to heat the gunner area. This extra demand reduces the power margin available to drive the rotor. The UH-60S power-management guidelines specify a 25 percent derate to the maximum rotor torque (Q) in this scenario, so you can safely use only 75% of the normal Q. That’s why the correct choice is a 25% reduction. The other percentages would not align with the documented derate for this combination of loads.

When you have engine anti-ice and the cockpit door gunner heater both on, the engine is carrying additional loads from bleed-air to anti-ice and from the heater to heat the gunner area. This extra demand reduces the power margin available to drive the rotor. The UH-60S power-management guidelines specify a 25 percent derate to the maximum rotor torque (Q) in this scenario, so you can safely use only 75% of the normal Q. That’s why the correct choice is a 25% reduction. The other percentages would not align with the documented derate for this combination of loads.

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