darinh
Joined: 20 Apr 2006
Posts: 327
Location: Utah
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 Posted: Mon Sep 22, 2008 3:37 pm Post subject: Flaperons, Trim Settings, & CG |
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Here is the deal. My Series 7, when flying solo with half tanks has a CG of about 10" (forward CG limit is 9" and aft is 16"). This is a bit on the nose heavy side...this is due to my engine and prop choice which together add about 30 lbs over the standard 912s and Warp Drive prop.
I really would like to use the flaperons during landing to lower my stall speed but when I deploy them the nose pitches forward quite a bit. So much that I can only flare to about a level attitude and this is with only the first notch of flaperons. I know you can put the trim assist on that reduces the back pressure on the stick but this doesn't help with the amount of flare available. Here is the question: At what CG will the plane NOT experience a drastic pitch forward when flaperons are deployed (12", 14", 15", ect.)? Has anyone done this test? Any comments on this? Or techniques that work for you?
I have heard that sealing the gap on the elevator will give better elevator authority as will adding VGs to the bottom side of the stab. I have not done this yet but will definitely seal the gaps....don't know about the VGs.
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Darin Hawkes
Series 7
914 Turbo
Kaysville, Utah |
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