Hi Tapio
Very helpful data.
I think I will need one of these from Mike to work it out
Tim
http://www.amazon.com/12-8-PROTRACTOR-GONIOMETER-SET/dp/B000MZRQXC/ref=sr_1_1?ie=UTF8&qid=1355238573&sr=8-1&keywords=goniometer
On Wed, Dec 12, 2012 at 5:26 PM, Tapio Linkosalo <tapio.linkosalo_at_iki.fi>wrote:
> **
>
>
> On 11.12.2012 22:50, mkirda_at_sbcglobal.net wrote:
> > Can you estimate the angular difference between low and high pitch?
> > Maybe 20 degrees?
>
> Bottom pitch at 150mm radius 24 degrees = 420mm
> Top pitch 42 degrees = 850mm
> Angular difference in blades 18 degrees.
>
> Yoke diameter 5mm, actuating arm length 4.5mm -> change in the spring
> angle 5/4.5 * 18 degrees = 20 degrees (bingo!) Prop pitch starts to
> reduce at approximately 8 to 9 g*cm.
>
> -Tapio
>
>
>
Received on Wed Dec 12 2012 - 02:26:35 CET