REFLECTOR: STRONG PITCH SYSTEM

[Pat Shea]

John,

 I was using a "runaway" pitch trim situation (say
from a electrical short) to the full nose down trim
position as the reasoning behind trimming the ? spring
a bit. I simulated that scenario (by running the trim
to the full nose down position). More back force was
required than I was comfortable having to land with.
However, it sounds like folks are running out of trim
even w/ an unmodified ? spring. Like everything else,
it's all about trade offs. On the other hand, I've
never heard of a Velocity encountering a runaway trim.
 If the trim can't handle all scenarios, I'll set it
up so that it can handle most cruise/high cruise
configurations and just live w/ the additional forces
needed during TO and landing since you're stick flying
then anyway.

Pat
 
--- John Dibble <aminetech at bluefrog.com> wrote:

> I think reducing the spring force is a move in the
> wrong direction.  You can always
> use more pitch trim.  With a trim button on the
> stick, it's easy to trim during short
> final or after rotation.  Also, you don't flare a
> Velocity that much anyway.
> 
> John
> 
> Pat Shea wrote:
> 
> >  Also, I simulated a runaway trim situation to the
> > full down position using the standard factory
> system.
> > With the original ? spring, it seemed like more
> force
> > than I'd be comfortable overcoming while flying an
> > approach thru flare. I trimmed the spring down a
> > little to the point this situation seemed
> manageable.
> > I didn't factor in the air load on the elevator,
> which
> > would make things worse in this scenario, but I
> > figured it would probably be offset by
> adrenaline.....



		
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