Author Topic: Dihedral methods  (Read 20 times)

Offline Brock

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Dihedral methods
« on: Today at 03:12:53 PM »
First off, I had to look up the spelling to make sure I didn't write 'diederal'.  Not a word I use often.
So, I'm at the point of needing to mount dem wings.  They are mostly finished except leading edge ply.  I have some sacraficial conduit for struts.  The reason for needing to mount is my aileron pully locations on the airframe seem to not be low enough thus I'll likely weld on some material once I know exactly where I can put the pullies.

So Here is my question.  Since the hangar floor is not really all that flat & level I'm fearing that leveling the airframe and measureing from the floor 3" will be a settup for error.  So I thought that perhaps I could convert the 3" to an angle.  154" wing length with 3" lift comes out to something like 1.1 degrees.  Thats not much.  Has anyone set their dihedral with a digital level this way?  If so what did you learn (so I don't have to).

The only other idea (which just came to me) is to have is to perhaps get (or make) a water level of some sort and just set one end on the root and tip of the wing.  If graduated in inches then there would be no measurements to be done.  Hmmm, I'm liking this idea.
s/n: WEB-14, 3VLA
flu-flu: type of arrow that travels slow for short distance.


Offline Kamcoman77

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Re: Dihedral methods
« Reply #1 on: Today at 04:08:35 PM »
Level the fuselage, side to side. Take string level and pull it from the leveled longerons out past the wing tip. Measure from the string ai the fuselage to the wing root, and again at the wing tip. Tip should be 3" higher than line at fuselage/root.

Offline Brock

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Re: Dihedral methods
« Reply #2 on: Today at 05:55:09 PM »
So simple a cave man (me) can do it.  Thanks so much,  This will save me a lot of needless monkey business.
s/n: WEB-14, 3VLA
flu-flu: type of arrow that travels slow for short distance.

Offline Kamcoman77

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Re: Dihedral methods
« Reply #3 on: Today at 06:56:16 PM »
Glad I could help. I learned that trick from Mooga.