What is the maximum RPM for the propeller, and for how long can it be maintained?

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Multiple Choice

What is the maximum RPM for the propeller, and for how long can it be maintained?

The key idea is that propeller speed has a defined upper limit plus a time constraint for how long you can hold that limit. The propeller can be taken up to 1735 RPM, but only for a short period—up to 7 minutes. This short-duration limit protects the engine and prop from overheating and excessive stress during high-power phases like takeoff or initial climb. So the correct pairing is reaching the maximum of 1735 RPM and maintaining it for up to 7 minutes. The other options either exceed the permitted maximum, use a lower speed without indicating the time-restriction at the max, or specify a continuous limit that doesn’t reflect the short-duration max at full power.

The key idea is that propeller speed has a defined upper limit plus a time constraint for how long you can hold that limit. The propeller can be taken up to 1735 RPM, but only for a short period—up to 7 minutes. This short-duration limit protects the engine and prop from overheating and excessive stress during high-power phases like takeoff or initial climb. So the correct pairing is reaching the maximum of 1735 RPM and maintaining it for up to 7 minutes. The other options either exceed the permitted maximum, use a lower speed without indicating the time-restriction at the max, or specify a continuous limit that doesn’t reflect the short-duration max at full power.

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