DE Wing Dihedal

[Tom XL-7]

Have any of you operated a skid steer machine like a "bobcat" as an amateur. How did you like that forward and back oscillation. Let go and grab the cage is the answer then learn to be a little smoother on inputs until you get it down, I can see the possibility of roll oscillation without dihedral. Gyrocopters can get a pitch oscillation that can build to fatal. Too bad you may have to cut your struts to find out

[okdonn]

The Cessna 195 and the Wittman Tailwinds have no dihedral and are both very stable aircraft. However, they are not light wing loading craft, so who knows?

[Dan_]

Wing dihedral is one of the primary factors affecting roll stability.

Not to put too fine a point on it but dihedral effect is one of the primary factors affecting roll stability not to be confused with dihedral angle. 

A high wing airplane has plenty of dihedral effect due to the weight being below the wing irregardless of dihedral angle.  It imparts a pendulum effect, think paraglider/powered parachute.

A notorious Tailwind builder (builder of 12 Tailwinds) adds 3/4" of dihedral on a 24' span even though the plans call for zero.  He does this so the wings do not look like they droop (anhedral).

The last thing I want in a light plane is to invite a gust getting under a wing with dihedral it does not need on short final in a crosswind putting me in a big dutch roll.

If you only ever fly in absolute nil wind and don't need the lift you would give up, you could put as much in as a 2 axis design perhaps.  Most 2 axis ultralights I have seen have more span.

Just my (strongly held) opinion.  https://en.wikipedia.org/wiki/Dihedral_(aeronautics)

[azevedoflyer]

Well, 3" at the tip of a 168" wing (per DE Left wing drawing / 3" tilt is listed) boils down to a measly 1 deg. dihedral per side.
The restoring rolling moment will be 1.8% of the lift generated. At a DE AUW of 900 lbf, that equates to 16 lbf.
Did not calculate but I suspect that the pendulum effect of engine, fuselage and pilot weight - forget fuse drag for the moment - will be more relevant.
Mr. DErwin, as said above, look at left wing drawing and in the text below it is stated dihedral to be provided by a 3" tilt upwards.
Cheers,
azevedoflyer😎