RPM FOR DAKOTA

daviddillehaydaviddillehay
in General Discussion

After a long idle for avionics install, my 81 Dakota does not want to exceed 2350 rpm but as usual has plenty of power. Any ideas?


Dave Dillehay

N8442A

Comments

  • planewrenchplanewrench

    First of all what does the POH say take off RPM should be? Carl

    48 yrs A/P IA DAL aircraft inspector. 172N

  • daviddillehaydaviddillehay

    THE POH does not give a takeoff RPM. The O540J35D engine only says 2400 RPM max. Are there any Dakota owners that can add their experience?


    Dave Dillehay

    N8442A

  • planewrenchplanewrench

    Dave that is the take off RPM. Do you have a digital tac or a standard tac?

    Carl

    48 yrs A/P IA DAL aircraft inspector. 172N

  • daviddillehaydaviddillehay

    WE have both and they seem accurate.


    Dave

  • planewrenchplanewrench

    Ideally you should be hitting the 2400 static before you do anything you need to make sure there's no slop in the prop control system and that you're hitting the stop on the governor and you have a cushion on the prop control on the quadrant. If you're hitting 2400 on the takeoff roll you're actually doing pretty good. Verify no play in the system then your mechanic can adj the gov. .

    Nice to have a digital system to verify mechanical tach.

    Carl

    48 yrs A/P IA DAL aircraft inspector. 172N

  • daviddillehaydaviddillehay

    Finally the answer. Prop governor was going out and completely failed with broken pump shaft. Whew...just more money! Now if the Dual Mag (D-3000) is fixed!

    Dave Dillehay

    N8442A

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