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The Long EZ


I was never crazy about hot wiring my own wings.  Not that I was afraid mind you, it is just that with the learning curve and all, I thought it would add many months and effort to the project  by learning to do the airfoil shapes correctly.  Fortunately, there is Jeff  Russell at  They design and build parts for their own canard desig, as well as parts for Cozy's and other aircraft.  They also build long ez wings.  I purchased the wing cores already cut,  molded wing spars and a spar and canard cores.  As soon as I saw the wing spars I knew I had made the right choice.  The price was very fair to have someone who has built actually hundreds of wings perform the labor intensive part of my wings.  The wings will be assembled differently than the plans long ez wings.  In my opinion, much simpler.   For starters the wing attach holes can be drilled prior to building the wings.  
The molded spars are really nice.  At right is a photo of  the right inside wing attach bolt hardpoint. The view is looking from the rear.   The wing attach bolt will go through this aluminum and then through the aluminum plates on the center spar.  The green portion is the rear of the center section spar.

The photos at right show two views of the  first trial fit of the wing spar against the rear of the center spar.  The alignment of the wing spar hardpoints to the center spar hardpoint was not exact, but well within the limits for the bolts to get a good grip.  This is one advantage of the Aerocad spars.  That being you can align the spars together, then drill the bolt holes without needing  to have the wings completely built.  As long as the wing spar is square to the center spar, and the wing foam is square to the wing spar, then the wing will be square to the square root of the triangle between the left tire and blah, blah get the picture.
Before attaching the foam cores and closing the wings, it was time to drill the wing attach bolt holes.   The wings are attached to the center section spar with three 1/2 inch bolts on each wing.  First you align the wing spars up against the center section spar.  This was done by leveling the fuselage longerons.  Then the spars are clamped to the center section spar, being supported by various items from my garage.  My building partner Phil and  I then measured sweep by taking a measurement from the center point of the canard attach bulkhead to the center of the outer wing attach hardpoint.  Once they were within 2/10 of an inch I was satisfied.  The plans say sweep can vary by as much as three inches at the wing tips and not affect flying qualitites.  Next was a phone call to Jeff Russell at Aerocad for help on leveling.  My problem was my driveway is not level.  I was able to block the fuselage level, but the wing spars are not level aross the top( they slant rearward and taper outward) , so I could not just slap a level across the spars.  Since I previously leveled the center section spar, I knew the outboard center section spar  hardpoints are level, (see above paragraph)  so I flushed the tops of the spar hardpoints  to the tops of the hardpoints on  the center section.  Then I stepped back and stared at the whole thing for 30 minutes, remeasured, and then grabbed the drill.  A hole is drilled from the rear of the wing spar hardpoint through the center section spar hardpoint.  Eventually 5/8 inch holes will go in, but for now, 1/4 inch pilot holes are drilled.  I can now start building the wings.


The three hour trip to Ft. Pierce from Clearwater was made and my wife's brand new van was stuffed to the gills with foam and the spars are attached to the roof.






Wing Page 2