Re: carbon VP hub data? [1 Attachment]

From: Tapio Linkosalo <tapio.linkosalo_at_iki.fi>
Date: Sat, 02 Mar 2013 07:23:44 +0200

On 1.3.2013 22:49, Kevin Lamers wrote:
> [Attachment(s) <#TopText> from Kevin Lamers included below]
>
> Here a carbon hub I'm working on currently. The main tube weighs 15mg
> including the bracket for the screws. The tube is 2mm ID and has a
> 0.05mm wall thickness (2 layers 17 gsm prepreg).
> I hope the attachment gets through.

Yes, it came out fine. I have two questions: first, you have the prop
blade hinge as the two carbon tubes pivoting within each other? how much
friction is there to that hinge? I was discussing component weight with
Kang several months ago, tried his setup to use a small carbon rod as
the blade holder pivoting inside the (0.3mm ID) pultruded tube, but it
felt to me to have quite a lot of friction. I'm slowly coming towards a
conclusion that these blade hinges should be very free to help adjusting
the hub... The second question is shorter: what keeps the blade holder
from pulling out of the hub (when centrifugal force of rotation is
applied)? Your pitch arm has a slot, so the pitch setting wire cannot
second as a blade holder.



-Tapio-
Received on Fri Mar 01 2013 - 21:23:32 CET