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Practical Helicopter Theory I like nitro helicopters, and the Avant Mostro with YS 120 power is as good as it gets with all the latest design features. The CNC all-metal head is fully ball-bearing-supported and incorporates the follower in the pushrods. You don't have to be an aeronautical engineer to fly a model helicopter, but having a certain amount of technical knowledge will enable you to set up your helicopter for maximum performance and, therefore,...

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