Slobodan Midic has a design that does that already, as well as Dr. Drela's info posted here. There is still a lot of room for experimentation and optimization with those designs. Drela's design has one drawback in that it applies torque a typical design may not be able to overcome. Offsetting the wing further may help, as may limiting the largest diameter a bit more. The hinges are also critical. Spring design for closing also becomes critical as the change comes over 160 degrees.
By all means, experiment with these designs.
Regards.
Mike Kirda
--- In Indoor_Construction_at_yahoogroups.com, Tapio Linkosalo <tapio.linkosalo@...> wrote:
>
> On Tue, Feb 11, 2014 at 12:36 PM, Phedon Tsiknopoulos
> <phedon21t_at_...>wrote:
>
> >
> >
> > What if we have variable pitch as well as variable diameter?
> >
> >
>
>
> Also that has been tried (change the pitch along changing diameter), but no
> break-through on that either. Probably you would need to have variable
> pitch distribution (VPD) prop for making the 50 mins.
>
>
>
> -Tapio-
>
Received on Tue Feb 11 2014 - 05:21:03 CET
This archive was generated by Yannick on Sat Dec 14 2019 - 19:13:48 CET