Tom, and others, The FAA just issued an airworthiness directive AD on Hoffman props used with Limbach 2000. It requires any blades that do not have an A or B suffix to the serial number to be replaced. It deals with possible loss of a blade, and the number and size of the retaining screws.
I dodged that bullet M On Sat, Oct 13, 2018, 3:48 PM Tom Preisser <[email protected]> wrote: > Perhaps you are pulling the handle too far out ? Just pull it a little, > because if you pull it too far the prop will rumble, the rpm will fall too > much, and no change to cruise will happen. > Let us all know what you discover. > > On Friday, October 12, 2018, Rob Thompson <[email protected]> wrote: > > 1- Normally the RPM on change should be 2200 to go into cruise. > > 2 - Sounds like the pitch change/feather plate on the rear of the prop > is not running true or alternatively the two bearings that contact it are > not touching at the same time. > > Use a finger dial guage to check if the plate is true. > > regards > > Rob > > Rob Thompson > > 0429 493 828 > > (Please note that my new email address is [email protected]) > > > > On Sat, Oct 13, 2018 at 6:53 AM Jarek Steliga <[email protected]> > wrote: > >> > >> > >> Hello, > >> I am quite new here (have owned Dimona for only 3 months). > >> Despite scrupulously folliowing the instructions regarding the required > RPM-s of between 1800 to 1900 at which the propeller pitch is changed from > START to CRUISE in midair, I have only succeedded twice despite numerous > attempts. Also pulling the pitch lever in the cockpit results in scary > vibrations which discourages me from continuing my trial and error methods. > Can someone please help? > >> > >> Best regards > >> Jarek > >>
