Longeron Hinges
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  • Step 6 INSTALLING HINGES ON THE LONGERONS

After cutting the hinges to length, I made myself a 4' long square by clamping together a large square and a 4' aluminum ruler.  I used the long square to align the hinges parallel to one another.  This image shows the square clamped to the instrument panel and also shows the packing tape I put on the hinges to prevent them from getting gummed up with epoxy.  I used a couple of stir sticks, cut on the ends, as stops to keep the hinges in the spots there were supposed to be.

Once the hinges were floxed on, I used blue masking tape to keep them from moving.  Now, time for some weight and another straight edge.
The long square I made kept them aligned in the longitudinal axis, in pitch I used a second straightedge and some weights to keep them aligned.  It took a while to set this all up but I wanted it to turn out right.
Once the flox was cured, I found a piece of wood that I could affix to both hinges and see how they worked.
Works great!  No binding at all!  Bring on the canopy!
I was thinking very hard about a front hinging canopy, and, went so far as to remove these hinges.

As I have thought about this more, I have begun to consider a side-hinging, electrically-actuated canopy.  Given the size and weight of a front-hinging canopy, almost everyone I know who has installed one has added an electric actuator.  With that idea in mind, does that solve some of the safety concerns for the side-hinging?  I believe it does, as long as you install some quick releases (inside and out) in case there's an emergency, the canopy needs to be opened and there is not electrical power or the actuator fails somehow.

More to come on that topic.

 

Chapter 16 Step 5     Chapter 19 Step 1

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