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  1. M

    Graupner SUMD failsafe problem, Versacopter

    Hi all, I'm having a failsafe issue with my Versacopter V2, which otherwise is flying awesome and taking some serious abuse very well! :) After switching my receiver and flight controller board to SUMD from PWM, I can no longer get the failsafe on the radio/receiver to work. When powering off...