Main gearbox is the crucial connection between Astazou engine, frame, the main rotor and tail rotor.This work of tech ingenious art is carrier of the hydro pack as well.There is a RPM sender inside it and you can see rotor rpm-s at the inside scale of tachometer at the instrumental board .At the side of main gearbox is also place for low oil pressure sender.Everything is here at this video.
The torquemeter is an unique instrument but so common at the helicopters.As the word say it measures the torque.Torque between main rotor and engine.It is one of the most important instruments.So here it is at the test board attached . Then checking the zero point with the test device,it seems ok so far. There you see the fixed zero point ad device prior the testing. From the both sides of torque indicator there are holes where you can adjust the tolerance at 0% and 100%. In case of using older version of device there are some tolerances to be inputed so this is the nearly fair good readings of maximum torque at SA 342. This is the reading at 50% How to connect the cables to Gazelle instalation. This is the dev
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