EU-1a Elecrtic Conversion
06-18-2015, 01:42 PM
#77
I moved the CG why back, to 36% MAC, it just barely sits on the main gear. That seemed to cure about 90% of the canopy pull. I tried thrust and incidence changes, with little effect. It seems to fly fine at this point. The dihedral was NOT set in the cores from Don. His suggestion was to build with the top of that panels on a flat surface. The new wings are being build by Dave Snow (not foam), as a one piece wing. The dihedral angle is 1.333 inches, measured from the root center line to the tip center line, on each panel, which is more than where I started.
That will result in a significant increase in dihedral. Mine has 1-1/4" each tip, but measured from the table to the BOTTOM of the wing tip. My aircraft has a good bit of adverse roll with rudder application. Might be time to get out the saw.........
Robert
06-18-2015, 01:44 PM
#78
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Yup, considerably more. i cut into the wing twice to get it right.
06-19-2015, 12:53 PM
#79
On the Circus Circus model it was flat, on the Blue Angel EU-1A I'm flying now it's different.
If you stretch a string across the top from wingtip to wingtip it's 1 inch from the string to the top of the wing in the center.
Chris...
If you stretch a string across the top from wingtip to wingtip it's 1 inch from the string to the top of the wing in the center.
Chris...
06-20-2015, 06:21 AM
#81
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i don't think there was an all wood EU 1a, it was always foam and glass. There are plans for the non a version, but that was different. On the foam cores, the instruction had you join the panels in their lower blocks to set the dihedral, no angle is mentioned.
06-20-2015, 01:27 PM
#83
The Fling Models article about the original EU1 (Interestingly, "Ellen Ullery" -1, for his wife) was an all wood one. Not sure how many were made but plans are out there. It was quite a bit different than the EU1A, in composite. The wood one was bigger.
Would like some comments on how the different dihedrals fly, and what's recommended.
Would like some comments on how the different dihedrals fly, and what's recommended.
04-04-2016, 06:23 AM
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Post 75,
I moved the CG why back, to 36% MAC, it just barely sits on the main gear. That seemed to cure about 90% of the canopy pull. I tried thrust and incidence changes, with little effect. It seems to fly fine at this point. The dihedral was NOT set in the cores from Don. His suggestion was to build with the top of that panels on a flat surface. The new wings are being build by Dave Snow (not foam), as a one piece wing. The dihedral angle is 1.333 inches, measured from the root center line to the tip center line, on each panel, which is more than where I started.
I moved the CG why back, to 36% MAC, it just barely sits on the main gear. That seemed to cure about 90% of the canopy pull. I tried thrust and incidence changes, with little effect. It seems to fly fine at this point. The dihedral was NOT set in the cores from Don. His suggestion was to build with the top of that panels on a flat surface. The new wings are being build by Dave Snow (not foam), as a one piece wing. The dihedral angle is 1.333 inches, measured from the root center line to the tip center line, on each panel, which is more than where I started.
04-04-2016, 06:46 AM
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Yeah, that was where I ended up after cutting twice, so new wing was built to that. I have not yet decided if I should move the stab location as some have suggested.
