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Found 1 result

  1. Engine RPM after startup

    Hi everyone, After seeing this video, I have some questions. I know that the turboprops of the Herc are constant speed ones, meaning the pitch of the blades is adjusted in order to gain speed. In the video above, a Fat Albert is going through startup procedures. At 0:05 engine No.3 starts up and at 0:43 it seems like the engine is at idle speed. Then at 0:46 the engine increases its RPM which can be heard and seen. This startup procedure is repeated for the engines No.4, No.2 and No.1. When the video reaches 2:11, the engines somehow decrease their RPM. And with this RPM, the Fat Albert starts to taxi. Is there some kind of switch to increase and decrease the RPM of the engines? And what is the use of this increase and decrease of RPM? I hope to hear from someone soon. Kind regards, C-130Hercules