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  1. M

    gyro recommendations for HKS 700E engine?

    I had a Sport Copter Vortex with a 700e. It flew fine except for high density altitude days. Then it was a dog. I had the 3.47 ratio gear box and not a big enough prop for that ratio. I probably lost 30-40 lbs of thrust on that setup. It was very quiet and fuel efficient. This last year I...
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