Fabrication of a Vert Stab Nose Rib

Software messed up some pictures, trying to fix it
Not sure of the actual date, between Feb – May 2011

We decided to remake a nose rib for the vertical stabilizer.  Here is what we have learned

Former and sheet materialLocate FormerDrill holes for clamp screws

A

Locate Former

B

Drill holes for clamp screws

C

Clamp material

D

Trace outline with washer with right Inner Radius for rib flange

E

Outline with former

F

Outline on material

G

Drilling Corner radius of flange, makes it easier to snip out

H

Blurry pic of outline with corner holes

I

Cutting rib out with shears, cutting to the corner holes

J

 

Front and Back cut out

 

K

Cutting Edges, notice plenty of extra to file later

L

Mount in form block

M

Marking where the flutes are located

N

Used fluting pliers at the marks, this helps with the initial forming

O

Forming a flange with a mallet, glancing taps/hits to push the metal over

P

Forming the flange

Q

Using a rod (and hammer) to get the flutes formed

R

Formed rib

Need to trim the front off and clean it up.  Basic forming time is five mintes or less.  Of course it took us a few ribs to figure the process out.

New Vert Stab Tip Attachment

Not really sure of the specific date of this work, let’s just say it was between Feb and May 2011.  Dan I and wanted to have access to the vert stab tip in case we wanted to put a position light or an antenna later on.  Dan found some light weight plastic electrical conduit that he heated up to put a bend in to go from the bottom rib to the top rib.

Conduit for Vert Stab

Worsk great, now hoe to make the tip removable.  One method uses an upside down rib attached to the top rib so you have a flange to put nut plates on.  Dan thought of a different solution of making a sheetmetal strip that goes between the skin and the top rib and it projects up to allow a flange for the tip to attach.  I’ll try and find a better picture:

New Vert Stab Attach Strip in Place With Top Rib

The vert stab top rib is on the bottom, the new strip is on the outside and the stip extends up under the fiberglass tip.  A great feature of this solution is that it supports the nose of the tip all the way around.  Here is the back end of the tip

Here is Dan holding the complete assembly.

New Vert Tip Attach Method
New Vert Tip Attach Method Assembled

So the fiberglass tip will butt up against the skin instead of going under it.  Dan did a fantastic job of mating these to edges.

Vert Stab Tip Skin Joint (Wicked Nice)

Where the silver clecos are above we will have nutplates behind the stip so washer head screws will secure the tip on.

Here is the horizontal alignment and end alignment with the rudder

Vert Stab Tip & Rudder Alignment (Sweet)

Return To Empennage – Vertical Stabilizer