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  • Re: Another in flight adjustable question

    by » 5 weeks ago


    I have been using an Airmaster constant speed propeller for 700hrs on my 912 ULS following the Rotax charts. Defaults are set to: Take off rpm is set to 5800rpm, extended climb or max continuous is set at 5450rpm, I have my default cruise rpm setting set for 5250rpm, the cruise rpm can be lowered or raised manually using a switch and hold feature.  Above 3500 feet pressure altitude I use full in throttle if I am in a hurry, below 3500' pressure altitude I reduce manifold pressure to the chart numbers. I typically cruise at lower altitudes, so the 5250 rpm and reduced manifold pressure in the 26"hg area is mainly used.

    29321_2_29297_2_2F635909-4C5A-4A60-842C-33A8F685C916.jpeg (You do not have access to download this file.)

  • Re: Another in flight adjustable question

    by » 5 weeks ago


    Choose the fuel graph you like, select a data point (bullet) on your selected graph and check the table right below the data point... and there you are.

    Also note that the ISA graph means 15C and MSL. Considering both parameters explains why there is no bother above 3500 ft anyway.

    6000 revs are out of bounds, 5800 are OK for max 5 minutes. If you notice signs of detonation reduce revs and take it a little easier. Not knowing the type of plane you ride I would guess one usually gets a decent climb at 5200/5300, too. In that respect, worry less and fly more! By the way, it's called air time not miles flown.

    ;-)

    29328_2_FA01E587-8A72-467C-886B-591BF1B68648.jpeg (You do not have access to download this file.)

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