I’ve been saying for a long time that I need to make a 1/2A size incidence meter.  I finally decided to make one up.  I started by going to the local hobby shop and picking up the two largest sizes of K&S square tubing.  I verified the second largest fit tightly in the largest.  Then I pulled out some paper and drew out what I thought would be good.




I then transferred the measurements to some 3/32” ply and cut a 4” section of the larger tube.




I cut out the frame and glued the tube to the top of the frame.





I slid the smaller tube back in to check everything, then cut the two halves apart.  Next I cut the angles for the leading and trailing edges of the wing.  I also put a dimple in each outer tube to ensure there was a good friction fit.






I cut another piece of tubing and glued a bubble level to it, verifying the level matched the level I use for the tail surfaces and the prop fixture.






Perfect size for 1/2A:




Mark

  Well, that's pretty slick. You just need one for the engine, made out of that same aluminum angle you have sitting in that one pic. Attach it to the engine where the prop mounts, add the level or have it glued to it. If the bubble goes from line to line, and you manage to match the two, I would say your incidence is zero compared to the thrust line. You can just set a level on the horizontal tail. Mark the levels with some sort of fin line graduations every 1/16" just for refeence. With experience, you will be able to split the hairs pretty good and hit those 1 and 2 degree settings.
   Thanks for posting,
  Dan McEntee

  Where do you get the small levels? I don't know if I have ever seen anything like those in the places I shop at most.
  Type at you later,
   Dan McEntee

Harbor Freight Line Level:   https://www.harborfreight.com/search?q=line%20level  $1.50 or so