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Getting started When I remembered I wanted to take pictures of the construction, this is far as I was already.
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Side view
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The swash plate This little device is freaky. In a nutshell, the pitch of the blades varies through their rotation, according to the motions of the aileron/elevator servos (called cyclic on a helicopter) and the collective pitch. It's all a bit mad and I onyl slightly understand it so far.
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The engine OS 32 helicopter engine. Here it is with the Raptor cooling fan attached, basically a centrifugal fan.
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Engine, closeup
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Engine, other side