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(Cochrane Alberta Canada) Follow recent flights at: https://aprs.fi/cgmbk

Sunday, June 5, 2016

Aircraft Aft Wing is being Re-Angled

Day 6:  The aft wing has been cut free.
I have been busy daily at the hangar working to correct my problem.   With help from a local fellow here in Calgary that also has a quickie, we were able to determine the root of the problem is the rear wing.   I did major reading on the Quickie forum and found out others have had the same problem when building to the level lines in the drawings.  The root of the problem is angle of incidence of the wings.  In my case because I have two wings in tandem the angle reference between the two wings is called decalage.    We measured the angle of degrees many times and found I am out by three degrees.  The front canard wing should be set to climb at + 1 to +1.5 degrees compared to the aft wing (main wing).    This is as a result of, my incorrect rebuilding using the level lines.   You may know that I had the fuselage completely cut in half at one time.  We took a bunch of angle measurements on my airplane and then did the same on my neighbors Quickie Q2 aircraft, his is correct with his Canard about +1.5 degrees.  My rear wing was lifting by around +2 degrees over the Canard which is backwards to what it should have been.     Many builders have had the same problem in the past.  In six days I have completed cutting away the aft wing, it is now rotated -3 degrees, this will result in a decalage of +1 to +1.5 on the Canard (forward wing).   The wing was then flipped and the underside sanded in prep for the bonding and fiberglass tape,  Then there will be surface repairs and turtle deck repairs to complete.
When I bought the plane I was only able to fly it with 2 people on board and quite a bit of fuel.  My ferry flight home which ended in an engine outage and damaging forced landing on the highway was with full fuel and lots of baggage and passenger seat (suitcase) weight.  This unfortunately did not give me any chance to have a reference point as to how the aircraft trimmed out prior to my forced landing.  Many of these planes are active with most having the larger 100 hp (heavier) engine, some are also racing on a regular basis.  It is too bad that I did not know these details prior to rebuilding, but hey, building is as much fun as flying.

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