Incidence problems using Robart incidence meter
Hello,
I'm having trouble using the Robart Incidence meter.
I'm building a Sig Hog Biplane and the plans call for both wings to have a zero degree incidence relative to the datum plane.
I drew the datum line on the side of the fuselage and then leveled the line on a Robart stand.
With the fuselage upside down, I mounted the bottom wing and rechecked that the fuse was level.
Next I mounted the incidence meter on the right wing facing the wingtip and on the left wing facing away from the wing tip.
In both readings the meter is facing towards me when standing by the right wing.
In both cases the meter read zero.
Now when I switch the meter around so it's facing away from the right wingtip, it reads between -.25 to -.5 degrees incidence.
My question is, which reading is correct? If I go with the -.25 to -.5 the. I need to shim up the trailing edge to get to zero.
If I use the zero reading then I'm good and don't need to do anything.
Is this close enough for a non precision sport plane? Should I just test fly it and see if it needs adjusting? Sounds like I might have some wing warpage. But before I start shimming/sanding to get the incidence right, I want to make sure I have the correct reading.
Thanks for the help! I hope my question was not to confusing.
-Matt
Last edited by Flyboywbl; 07-20-2015 at 11:47 AM.