That is the old style props which didn't have enough lag screws to safely hold the blades in. Make sure you check the silicone seal on the inner blade where it goes into the hub. If a blade is coming out the silicon splits and you can see a definite gap in the silicone. Rob
Rob Thompson 0429 493 828 (Please note that my new email address is [email protected]) On Sun, Oct 14, 2018 at 8:58 AM Michael Stockhill <[email protected]> wrote: > 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 >> >> > >
