The negative incidence is designed into the aircraft for nominal cg loading.
If your CG moves aft, then the amount of download needed to be produced by
the elevator is decreased which means you will need to adjust your trim.
From a pilot standpoint, the further aft you move the cg, the less speed
stability you will have. As the cg moves forward, from the pilots point of
view, speed stability improves, but you will run out of nose up trim at slow
speeds, which means you may run out of aft stick on landing. What you would
like is for nominal cg loading, the horizontal stabilizer and the elevator
to be streamlined at cruise to obtain minimal drag.

Giff Marr
LIV-P/ Mistral 65%

-----Original Message-----
From: Bryan Wullner [mailto:sbej@verizon.net]
Sent: Friday, May 11, 2007 8:51 PM
To: lml@lancaironline.net
Subject: Flight Characteristic Question


I am building a Lancair 360.

I just permanently bonded the Horizontal stab on. I took every precaution to
get it within the 1/2 to 1 degree of negative incidence that Lancair
specifies.  I used the water level to come come up with the proper incidence
based on the plans.  After cure I recheck my incidence and Im 99% sure I
have somewhere between .09 and 1.3 degree of negative incidence

My question is:
If the Horizontal has more than 1 degree of Negative incidence, say  
1.5 or higher,  how does that affect the flight characteristics?    
And vice versa if it doesn't have enough negative incidence what does that
do to the flight?


Thanks
Bryan