[NSRCA-discussion] Full Flying Stab

[Atwood, Mark]

I can only say I never liked flying them.  Tried it once back in the early mid 90's and it felt horrible. Like you had 80% expo.  I'd pull and pull and pull and get almost nothing and then it would suddenly "bite" at a certain deflection.  

Its been a long time though, and I don't know how much of that was blow back waiting to get into the power curve of the servo. 
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----- Original Message -----
From: nsrca-discussion-bounces at lists.nsrca.org <nsrca-discussion-bounces at lists.nsrca.org>
To: General pattern discussion <nsrca-discussion at lists.nsrca.org>
Sent: Fri Aug 14 13:28:43 2009
Subject: Re: [NSRCA-discussion] Full Flying Stab

Yes Ron I'm aware of pivoting on the aerodynamic center. I had thoughts of
loading two servos against each other to eliminate backlash if it was a
problem. Maybe I need to breadboard it and see what I like and don't like.
Jim

-----Original Message-----
From: nsrca-discussion-bounces at lists.nsrca.org
[mailto:nsrca-discussion-bounces at lists.nsrca.org]On Behalf Of Ron Van Putte
Sent: Friday, August 14, 2009 10:06 AM
To: General pattern discussion
Subject: Re: [NSRCA-discussion] Full Flying Stab

I was faced with this problem many years ago when I build a canard
(tail-first) airplane with a full flying stab.  I solved it by
pivoting the stab at the aerodynamic center of the stab, to minimize/
eliminate moment change with deflection of the stab.  Then I spring
loaded the stab with a soft helical spring in one direction, so the
stab, in effect, had no "backlash".

Ron VP

On Aug 14, 2009, at 12:00 PM, J N Hiller wrote:

> I'm working on a new pattern design and would like some input on the
> feasibility of using a full flying stab. Servos are tighter and
> stronger now
> and the travel curve is more adjustable. Would it still be too
> loose and
> hunt or do they just not work?
> What do you think?
> Jim Hiller
>
> _______________________________________________
> NSRCA-discussion mailing list
> NSRCA-discussion at lists.nsrca.org
> http://lists.nsrca.org/mailman/listinfo/nsrca-discussion

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