Re: Re: F1M VP spring question

From: Tapio Linkosalo <tapio.linkosalo_at_iki.fi>
Date: Fri, 07 Sep 2012 08:06:10 +0300

On 7.9.2012 7:58, Mark F1diddler wrote:
>
>
> --- In Indoor_Construction_at_yahoogroups.com

>> the spring geometry that I have not realized, something that would make
>> it inherently stable instead of unstable, locations of the support point
>> for instance?
>
> Not sure what you mean by spring flipping, but you do have some kind of
> spacer/centering tube between main shaft and spring's inside diameter,
> correct?

The spring coil ID is larger than the bearing tubing in the hub (the
former, wound around 1.5mm mandrel is closer to 2mm while the tubing
around the hub shaft is 0.7mm OD). By flipping I mean that the "disk" of
the spring coil does not stay at right angle to the prop shaft, but
tilts until two points on the coil rim touch the shaft tubing/shaft.
This also has bad effect on the workings of the spring.

I was wondering if it makes any difference, which arm of the cross bar
the spring rest against? Now I bent the springs so that both adjustment
screw and the rest point are on the same side, this leaves the other
cross-bar arm clear for the pitch set screws. But maybe the spring would
be more stable if the support points were 180 degrees from each other?

I may need to take a pic of this later today... :-)



-Tapio-
Received on Thu Sep 06 2012 - 22:07:54 CEST