Elevator control: Pull-pull vs push rod

[Ron Van Putte]

s.vannostrand at kodak.com wrote:
> 
> Dan is the man!   I use the same pull-pull on elevator and rudder,but I 
> use 30# coated steel fishing leader.  THat's 30# for each elevator half. 
>  It's lighter, easier to bend and work with, and seems reliable.  The 
> wire exit guides are a must on a carbon fiber Aries fuse.  
> 
> For safety, I've seen several people put 4 eyelets at the servo end (2 
> at each arm) so that each elevator half has a dedicated wire.  Then, if 
> a wire breaks, the other elevator half keeps working.  I've seen a 
> Prophecy fly around and land after losing an elevator half.  I guess we 
> really don't need a full elevator for basic flight.  This is a good 
> idea, but the extra 2 eyelet linkages are a small weight penalty and its 
> harder to wire up.  I've never done it this way (I use one looped wire 
> for both halves), but after seeing Wayne lose his plane because of a bad 
> crimp, I'm considering changing.

I use the coated 30 lb vinyl coated steel leader wire as well, but with 
two elevator servos, one for each elevator half, to provide redundancy. 
  Is it heavier?  Yes.  Does it take longer to set up than some other 
methods?  Yes.  Am I going to do it anyway?  Yes.

Ron Van Putte

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