I am having the same issue too, even with the parking brake set, the herc creaps along forward ever so slightly. if it has so much thrust even at idle then i thought at max power it would fly off so i tried it but the herc still creaps along just a tad bit faster with the brakes set. also noticed at full thrust the left wing starts to drop, don't know if this is thrust asymmetry over the wings or a bug. the wings drop independent of the brakes...even while shooting down the runway the left wing drops..tried the saitek x52 calibration and that didn't help either.