Re: VP Hub for Intermediate Stick

From: Leo Pilachowski <leop_at_lyradev.com>
Date: Wed, 19 Jun 2013 20:45:00 -0000

The trick to keep the spars holders from flying out is that the usual slots in ends of the rotating actuator bar are replaced by holes. Thus, the little arms from the spar holders are locked in radially by the actuator arm. This design feature is one of the key features that lets these small carbon tube vp hubs work. Bill Gowen recalled a picture of the carbon Kornechuk vp that used this design feature and pointed it out to Kang and I when we three were discussing the evolving design of the carbon tube based vp hub. One advantage with the holes rather than the slots is that it is much easier to drill a hole than cut a slot. It is not often that a superior design feature is also easier to build, an outcome that is much appreciated by many.

LP

--- In Indoor_Construction_at_yahoogroups.com, "mkirda@..." <mkirda@...> wrote:
>
> Hi Lauren.
>
> No, there is not enough force for that. The actuator arms 'lock' the blades/holders in place. There is only a tiny bit of movement outwards and maybe 20 degrees or so rotationally during the torque/pitch change.
>
> Regards.
> Mike Kirda
>
> --- In Indoor_Construction_at_yahoogroups.com, "lauren.rezac" <lauren.rezac@> wrote:
> >
> > Tom,
> >
> > How do the hinges stay on the shaft? Is it the wire that go through the torque arm? I would think the centrafugial force of the blades would force the hinges off of the shaft.
> >
> > Thanks,
> >
> > Lauren
>
Received on Wed Jun 19 2013 - 13:45:02 CEST