[NSRCA-discussion] Guys I need help...

[Bob Kane]

I don't know the distance between the leading edge and trailing edge on your wing, so I guessed at 20". A .15" rise at the leading edge compared to the trailing edge is 0.15"/20.0" = .0075; so INV SIN (.0075) = .43 degrees. I would trust this method over the Robart, they are not known for great accuracy.
 
Bob Kane
getterflash at yahoo.com


----- Original Message ----
From: John Konneker <jlkonn at hotmail.com>
To: nsrca-discussion at lists.nsrca.org
Sent: Wednesday, December 27, 2006 11:10:17 AM
Subject: [NSRCA-discussion] Guys I need help...


I am working on my Focus II.
I have the wing adjusters for one wing installed.
In order to minimize the chances of a less than level table to affect the 
incidence I decided to -0- the plane to itself.  The fuse sides at the 
canopy are supposed to be level with the "water line" so I put a level on it 
to check...bubble at -0-.  I then double checked against the fin bed and it 
showed level.  I put a Robart incidence meter on the wing, set the panel to 
+1/4 deg and glued the wing adjusters on that side.
This morning I was getting ready to do the other wing panel when I decided 
to do some measuring.
Here is where I ran in to the unexplainable...
I measured the wing leading edge to the table top and then the trailing edge 
to the table top.
I show approx. .15 inches positive!
I measured the leading and trailing edge to the piin stripe down the fuse 
side (this stripe appears close to the water line) same positve incidence 
shown.
I then rechecked with my incidence meter and got +1/4 deg with the fuse 
level...I then "reversed" the incidence meter to check to see if swapping 
ends had any effect...very little...maybe 1/8 degree...I can't read it that 
close.
I then traced the leading and trailing edges on the fuse side with a felt 
tip pin and rechecked my measurements to the table top and pin 
stripe...same.
I am at a loss.
How can I seem to be off this much?
I could just cry....
Any ideas?
Thanks!
JLK

_________________________________________________________________
Get live scores and news about your team: Add the Live.com Football Page 
www.live.com/?addtemplate=football&icid=T001MSN30A0701

_______________________________________________
NSRCA-discussion mailing list
NSRCA-discussion at lists.nsrca.org
http://lists.nsrca.org/mailman/listinfo/nsrca-discussion

__________________________________________________
Do You Yahoo!?
Tired of spam?  Yahoo! Mail has the best spam protection around 
http://mail.yahoo.com