Thanks, Rick....the feathering I knew about, and the description of
beta I will accept, but the choice of that particular word for that
particular function still leaves me scratching my head, but I'll drop
the line of questioning at that.
And regarding Hartzell...yeah, I figure they know a LOT about props,
as a friend of mine and I stopped by there on the way home from
Dayton, Ohio, early one morning, and were taken on about hour's tour
of the place....we saw everything from the raw stock, to balancing,
to finished props ready for shipping...really nice folks there.
Lynn Matteson
Kitfox IV Speedster, taildragger
Jabiru 2200, 593hrs
Sensenich 62x46
flying again after rebuild, and new Electroair direct-fire ignition
system;
also building a new pair of snow skis
do not archive
On Nov 27, 2008, at 6:58 PM, Weiss Richard wrote:
> Lynn,
>
> Here's a simple definition of Beta as provided by Hatrzell. I
> figure they may know a little about props.
> (I through in the feathering definition at no extra charge.)
>
> What is beta? What does feathering mean?
> Beta Range/Reverse
> Some constant speed propellers are equipped for beta/reverse
> operation. Beta Range is any blade angle below flight idle
> (Hydraulic low pitch stop). Reverse is any blade angle less than
> zero degrees. This blade angle produces thrust in a direction
> opposite to that of normal thrust. Such propellers are typically
> installed on aircraft with turbine engines and are used for to
> reduce landing roll.
>
> Feathering
> Some constant speed propellers, primarily installed on twin engine
> aircraft, are equipped to reposition the blades until they are
> nearly aligned with the relative wind. This position, termed
> feathering, is used to minimize drag, thus increasing single engine
> performance
>
>
> Rick Weiss
> N39RW Series V Speedster, 912ULS
> SkyStar S/N 1
> Port Orange, FL
>
>
