Mag checks at 75%
When I questioned the last change of the start card (mag checks at 75% not at 104%) with my friendly Robinson dealer.
I was informed that Frankie was getting concerned with the large amount of time his helicopters were sitting on the ground at operating revs and consequently a slight cyclic movement would cause abnormal vibration through the rotor head and shake, rattle and roll the associated components.
The R44 at 70% instead of 70 to 80% was to prevent the grumbling noise from the fan housing.
I also don't agree with the gov on before starting idea, even with the gov switched on it will not prevent an overspeed at start up, it does not have enough time to reduce the revs.