JDAir Latch

I had planned to fit the JDAir Canopy Latch right at the beginning of the fuselage build, whilst the left fuselage side was flat on the bench. But then I discovered that, at that time, the Classic Aero Interior side panel was not compatible, so I decided not to go ahead. Happily as time passed, Classic Aero and JDAir collaborated and incorporated a modification so that the side panel and latch worked together.

This meant that I now faced fitting the latch into a built fuselage … as many builders with a quick build fuselage find themselves.

Should I risk cutting holes in the precious fuselage? In for a penny, in for a pound (lots, actually!).

IMG 6487

So with bated breath I embarked on the process, since I think the JDAir Latch is a very nice addition to the plane.

The first job is to drill out the rivets securing the lower canopy handle bracket … very carefully, so you can use the bracket again, but this time lower down.

IMG 6488

The top of the new latch is fixed by the top of the existing slot.

The fore/aft position is fixed by the pivot point in the top bracket.

So I clecoed on the lower bracket outside the plane in the existing lower bracket holes, and marked the fore/aft hole limits.

IMG 6489

Then I used the JDAir template to mark the hole outlines.

This template is not RV14 specific, so really the only use of it is to provide the hole outlines. It’s up to you to work out where they should be … the preceding description is how I tackled it.

As you can see, the tolerances are very tight, but all but two of the lower bracket rivet holes are removed.

IMG 6491

I used a Dremel cutting disc to cut out the slots, allowing a good margin! This was the frightening bit!

IMG 6492

Then I carefully opened up the slots with a file, attaching the handles inside periodically to iteratively check the fit.

IMG 6495

Having attached the handle to the top bracket with the bolt, I clamped the lower bracket to the handle whilst match drilling from the inside out.

IMG 6497

I used the usual pop rivet dimple attachment to dimple the holes.

IMG 6498

The two arrows show the two rivet holes which need to be filled with “blank” rivets.

The rear one is easy, but the front one is underneath a section of the handle …

IMG 6496

… so you have to provide clearance for the shop head.

Some people don’t put a rivet here, and just fill the hole by other means. But I decided to set a shortened rivet just enough to secure it, with the minimum size shop head.

The handle section with the little clearance hole is completely hidden from view.

IMG 6513

Here’s the installed handle, with the little spring providing a satisfying crisp locking action.

Here’s a short video showing the handle in action.

Be the first to comment on "JDAir Latch"

Leave a comment

Your email address will not be published.