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Canard:


  

  First task is to protect that part of the lift tab, which will be proud of the canard surface. The imbedded portion is then rough sanded with 40-grit paper.

 

 

  After cleaning in etching fluid, the lift tabs are alodined to protect them from corrosion. This is an important step for all Aluminum parts which are to be imbedded into the structure and which therefore will not receive a coat of paint.

 

 

  The lift tab is attached to the Canard Spar in a jig to ensure correct alignment between each tab and between the spar and both tabs. A mistake here will cause problems with the canard incidence, requiring the canard elevators to be deflected in order to maintain level flight at cruise settings.






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  Lots of Bondo is used to glue the small vertical wood strips in place. More wood strips are used to jig the cores into position while the micro sets up. Tape is used to prevent the wood pieces from becoming permanently attached to the cores. The cores are positioned relative to the spar by use of a plumb line and the chord line drawn on the end face of the core. A twisted wing core must be avoided at all cost!

 

 

  After the front core has cured into position, the spar is flipped over and the process repeated with the rear cores. The problem of accurate alignment becomes more acute, hence the extra jigging with packing tape and foam blocks glued to the spar with more Bondo. Long straight edges and a laser level are used to check alignment.

 

 

  We abandoned Triax cloth after just one layup on the top surface. Each layer of Triax was replaced by three layers of Uni. The UNI orientation was -45 +45 and zero degrees to the spar direction. We also abandoned the factory supplied resin in favor of aviation grade MGS epoxy. The result is a much stronger and lighter canard despite adding one extra spanwise layup of UNI for added strength.

 

 

  The elevators were made on a specially constructed table. Orientation during construction was such that any twist, however small would be in the opposite direction for each elevator, thus canceling out any tendency to roll the aircraft. MGS resin is a very clear light blue color which has the effect of rendering the glass layup transparent. The core material can be seen clearly along with any voids or imperfections.


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  Only a very thin layer of micro was required in order to achieve an accurate airfoil profile. The canard tip was filled with X-30 pour foam for added stiffness and durability.

 

 

  The rear attach points are reinforced. The hatch cover will be removable and not part of the canard. This is a modification to allow easy access to the rear of the instrument panel without having to remove the canard.

 

 

  The hatch opening rim is glassed with Bid and finished with Dacron peelply to ensure a smooth finish. After cure the rim is microed and sanded smooth. After the application of several coats of mold release, more layups are made directly onto the rim.

 

 

  The hatch cover is made with 3/16 inch gap all around. The hatch is then bonded to the "second" rim and after cure it is removed, thus ensuring a perfect fit. Two layers of tape are used over the canard to compensate for finish paint layer thickness. Small details count!






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