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Christopher's Web Site
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Date: 2-3-2017
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Number of Hours: 4.00
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Manual Reference:
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Brief Description: Driveshaft Installation
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The next step that Tom took on was the installation of the drive shaft for the tail rotor. One side of the shaft had been prepared for the love joy connector, but the tail rotor side needed to be sized for the helicopter, cut, and an internal sleeve needed to be inserted and welded in place for strength since the shaft is hollow to save weight.
The installation dry fit was stopped short due to a miss-sized block bearing supplied with the kit. The driveshaft is held on the tail boom with six bearing blocks that are shimmed in place and hold the shaft in perfect alignment between the engine transmission and the tail rotor gearbox. The shaft needed to be cleaned of all burrs and imperfections, then the bearing blocks need to be precisely sized for the shaft with a dremel tool. Once the bearing blocks are sized to the shaft, they can be sized and slid into position and mounting location onto the boom. The shaft is held in perfect alignment with the transmission with a jig, and then a tight string line is used for alignment to the tail rotor. The blocks are shimmed up to the string line and an automotive gauge tool is used to determine how much the blocks need to be raised. This is the first true test as to how I did installing the tail boom to the frame because if I screwed it up, nothing will align and the driveshaft won’t connect. If you remember, it took me all day to drill the tail boom mounting holes, and as it turns out, it was worth every second.
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