REFLECTOR: Not enough Trim authority

aminetech at bluefrog.com aminetech at bluefrog.com
Mon Nov 16 15:48:35 CST 2009


Scott,

Before I reversed the sparrow strainer, my pitch trim ran out at 155-160 kias.  I recall that you tried reversing it and didn't have enough trim up for approach.  Perhaps no strainer at all would be a happy medium that would work for you.

John

--- scott at tnstaafl.net wrote:



I do have a problem with the trim.  I just don't have enough down trim
for cruise speeds.  If my indicated is 150kias or below its fine. I am
using the Strong System because I was under the impression it had a
wider range of trim than the factory design. Now I wonder.  I have
plenty of up trim on approach with single pilot but I haven't loaded up
the front yet(forward cg).  Still waiting for the new Catto prop before
I add any more ballast to the front seat.  I have the system installed
so its got about 60% down trim travel, and 40% up trim, so I'm already 
over  compensated  for down trim.  The instructions call for 50/50.  
I'm sending Alex an email to see what he recommends.

In the mean time I'm thinking about plan B, which is to reinstall the
factory trim, but stiffen up the spring somewhat to provide more trim
authority.  I'msomewhat reluctant because of the problem of runway trim
with a stronger spring.

What are the fast V's doing?  I had marginal trim before with the
factory spring, not quite enough down, just barely enough up with the
io360.  Thats why I changed to the Strong system. 

Anybody else have this problem?  Solutions?

Scott



 



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