Urgent ! Incidence Meter Question

[Larry Diamond]

Scott,

I think everyone offered suggestions on what you should do, and I would agree. To answer your question, we need to make an assumption.

Set aside accuracy of the meter for now and look at repeatability. If the meter isn't accurate, but constantly provides the same exact reading for a measurement each and every time you set up the meter we have good repeatability.

If the repeatability is good, then the reference between your 1/2 degree on the table would mean that your table is sloped 1/2 degree.

Other folks can chime in on this. As I see it, you may need to consider the fuse reference line (thrust line). If the fuse is set relative to the table, you will need to account for the 1/2 degree slope.

As for accuracy of the meter, "Is 1/2 degree, actually 1/2 degree?", I don't have the experience to offer sound advice / opinion.

However, if your meter is repeatable, then I would say that your stabs should be on the same plain and your wings on the same plain if you use the same reference point on the meter to set them up (and check all measurements without moving the plane.

Based on everything I've heard and read about setting up a plane, you will most like be adjusting the incidence during the trimming based on actual flight performance.

Let's see what the experts say about these thoughts as I'm no expert in setting up planes.

Larry
  ----- Original Message ----- 
  From: Scott Pavlock 
  To: NSRCA Discussion Page 
  Sent: Saturday, January 24, 2004 8:20 PM
  Subject: Urgent ! Incidence Meter Question


    I am currently installing my wing adusters on my Focus 2 and I am trying to calibrate my Great Planes Incidence Meter. I placed the meter on a perfectly level table and set it for Zero Degrees. I decided to rotate the device 180 to see if it would still be level (the laser was roughly facing north and now is facing south). The degrees changed positive 1/2 degree. I thought I might have moved the placement of the laser so I secured everything possible with tape and rotated it again. Same thing. Does anyone know what might be the problem???

    Thanks in advance!
    _______________________________________________________________
    Scott Pavlock

    photos.yahoo.com/f3aflyer7

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