Rotor Blade RPM setting

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    Profile photo of PEET PEET 

    I see a lot of discussion re low rotor RPM but have not seen much on the governor setting
    The green arc for rotor rpm on a R22 is 101% to 104%.

    I guess most governors are set by the AMO within this 3% limit, but what will be the effect if the governor is set to its max allowable limit (say 104%) versus a machine that is set at its minimum setting (say 101%)
    Rotor tip speed at 100% is given at 672 fps (737 km/h)
    At 104% it is 699 (767 km/h)
    That is a 30 km hr difference and should have a notable effect on performance

    I tend to reason the machine with the higher blade speed will
    Use more fuel ?
    Fly faster ?
    Generate more lift and better high altitude performance ?
    Have more engine power available ?
    Will VNE be less for the faster rotating machine ?

    The limits are less for the R44 (101% and 102%)

    Thank you in advance to all the technical guru’s

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