Urgent ! Incidence Meter Question

[Kenneth Blackwell]

Scott,

Incidence meters of all types are generally not accurate enough for pattern use. You need an accuracy of  0.1 deg. I have an electronic digital level that will read to 0.1 deg and I only use it for cross checks. Although the readout is good to 0.1 deg, the overall accuracy isn't that good. If you have a good flat table...the very best way is to set the fuse on the table and measure up to the centers of wing/stab LE/TE then with trig calculate the incidence angle. To do this you need an accurate vertical measurementwith an accuracy of 1/64" or better. On the Focus I and II the bottom of the fuselage is zero incidence. Both wing and stab should be set to specifications provided by Piedmont from this reference.

Cheers,

Ken Blackwell
Precision Model Design
blackwellk at snowhill.com
  ----- Original Message ----- 
  From: Scott Pavlock 
  To: NSRCA Discussion Page 
  Sent: Saturday, January 24, 2004 7:20 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

-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.f3a.us/pipermail/nsrca-discussion/attachments/20040125/ef657d78/attachment.html