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I had a thought coming home today.  I was thinking about the
trim system.

We already have the sparrow strainer, supposedly to help with the
pitch stability, but I just don't see how it is anything more
than a trim tab.  BTW, where did it get its name from?

I was thinking:  What would be the possibility of making the
sparrow strainer pivot on its mount.  A pair of opposing braided
stainless wire could be run in to the elevator through the 
torque tube where each one loops over it's own pulley.  The
wires then go to a servo that is attached (inside the fuselage)
to the torque tube.

The whole assembly would certainly weigh less than the current
actuator, and would be just a little more complicated.  Certainly
no more complicated than a conventional spamcan trim system.

One would have to pay attention to elevator balance though, the
hinge on the strainer would undoubtedly add some weight to
an already long moment.

Brian Michalk  <http://www.awpi.com/michalk>
Life is what you make of it ... never wish you had done something.
Aviator, experimental aircraft builder, motorcyclist, SCUBA diver
musician, home-brewer, entrepenuer and SINGLE!