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Thread: Blade 912/582 climbing problem

  1. #11

    Blade 912/582 climbing problem

    Thanks Guys, I had a word with Roger at P&M, he suggested check the ASI, tips down, and optical tachometer. I assume that with the optical tach you multiply the prop rpm by the gearbox reduction to get the engine rpm.

  2. #12

    Blade 912/582 climbing problem

    "I assume that with the optical tach you multiply the prop rpm by the gearbox reduction to get the engine rpm."
    Yes.
    Dave

  3. #13

    Blade 912/582 climbing problem

    Problem turned out to be - the ASI - it seemed to be under-reading by 50%, i.e. showing 50 mph, doing around 75 mph - no wonder the bar was going through my stomach! Fitted a new ASI (Falcon) and took it for a test flight. Ran checks whilst airborne using a hand held anemometer against the ASI, checked out O.K.
    Now to turn the tips down to see if I can get 80.

    Cheers all.

    Ross

  4. #14

    Blade 912/582 climbing problem

    GPS on a calm day is the most useful benchmark.

  5. #15

    Blade 912/582 climbing problem

    Thanks Dave, - I fly out of Perth, I wouldn't recognise a calm day if it bit me :freaked:

    No GPS fitted either - I'm old fashioned, map and two old Mk. 1 eyeballs only :shocked:

    Holding the anemometer just above the pitot gave near enough identical readings to the ASI.

    Cheers,
    Ross

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