wing incidence
Posted: Fri Feb 17, 2012 8:39 pm
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> Hello again,
With all this talk of the stab incidence, I would like to know what the wing incidence is and/or should be. A quick calculation of the hole locations between the front and rear wing bolt holes figures out that they are angled about 2.0 degrees. I have not measured or figured out what the difference in the mounting holes on the wing itself are, therefore, I cannot calculate what the incidence should be.
If anyone has the wing incidence numbers as measured on the BOTTOM of the wing I would appreciate them. I have not seen the wing incidence in my manual anywhere probably because it pretty much sets itself by default using the fus brackets and the wing brackets. This number would be to merely confirm that both sides are set equally.
As Wayne has pointed out the electronic levels are convienient.
However, the one that I am familiar with is only accurate to 0.1 degree. This calculates out to 0.084" over 4 feet. I set up my A/C using a machinist's level clamped onto a regular 4 foot level frame. This has worked well for me. The machinist's level costs about $75 US. Sometimes it is too accurate as the graduations are .001 per line in the bubble area and you just have to decide how accurate you want it.
Another item that I added to my A/C are two holes in the side of the fuselage just under 4 feet apart to be used for leveling the aircraft. One point of interest is that the holes on the center crease of the side skins are level and you may use these to level the fuse. I have measured the CAD database of Murphy's drawing to determine this.
Thanks,
Rick D.
With all this talk of the stab incidence, I would like to know what the wing incidence is and/or should be. A quick calculation of the hole locations between the front and rear wing bolt holes figures out that they are angled about 2.0 degrees. I have not measured or figured out what the difference in the mounting holes on the wing itself are, therefore, I cannot calculate what the incidence should be.
If anyone has the wing incidence numbers as measured on the BOTTOM of the wing I would appreciate them. I have not seen the wing incidence in my manual anywhere probably because it pretty much sets itself by default using the fus brackets and the wing brackets. This number would be to merely confirm that both sides are set equally.
As Wayne has pointed out the electronic levels are convienient.
However, the one that I am familiar with is only accurate to 0.1 degree. This calculates out to 0.084" over 4 feet. I set up my A/C using a machinist's level clamped onto a regular 4 foot level frame. This has worked well for me. The machinist's level costs about $75 US. Sometimes it is too accurate as the graduations are .001 per line in the bubble area and you just have to decide how accurate you want it.
Another item that I added to my A/C are two holes in the side of the fuselage just under 4 feet apart to be used for leveling the aircraft. One point of interest is that the holes on the center crease of the side skins are level and you may use these to level the fuse. I have measured the CAD database of Murphy's drawing to determine this.
Thanks,
Rick D.
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