Overview
Task to assemble all the hardware into the wings for skinning.
Installation
The first task was to install all the piping for the return lines and for the pickups for the external [future] tanks. A trail fit of a tank previously showed a clash with the fuel sender required a U to route around it plus a few Aeroflow fittings. At this time the pitot tube and wiring were loomed and installed on the underside of the ribs. The wires cover strobes and power /signal for the under wings tanks on both sides.
Note: All fittings are all full flow not 90 degree as per aircraft AN fittings
With the pipes installed the tank was fitted to allow connection and fitting of the components onto the tank.
Note: Last rib is only clecoed allowing all the tank fittings to be installed except the fuel cap which is last.
 |
| External tank fuel and electrical connections Access hatch is for service and connection when commissioned |
 |
| Fuel return and delivery lines from external tanks port side |
 |
| Fuel delivery line from external tanks. Loom is for strobes and external tanks pump / low fuel indicator |
The skins were installed and clecoed from the underside to provide access and to locate the ribs allowing the tubes and electrical to be cut and installed.
The leading edges of these wings are dimpled and without doubt this has quadrupled the work to install the skins.
In particular when installing the stringers the skins were removed and reinstalled to many times to count providing access or alignment for the top or bottom stringer and then at either end to install the T clips shown below.
The connection to the check valves at the end of the tank have been changed from rubber to aluminium as I had to purchase a new roll of aluminium and it was there and lighter.
Work on the piping was much easier as it was really a copy of the port side and visa versa for the working and associated clips.
It was decided to fix the stringers to the ribs using a T clip made from 2024-T3 aluminium to place the stringer flush with the skin from rib 7 to 4 and then fit a 0.025'' packer from rib 4 to 1
In the photograph below there there is 0.05'' of metal [rib and skin] and the Tee will place the face of the stringer flush with the top side of the outer skin when the next skin is placed on the wing.
 |
| The Tee is at odd angles because the stringer runs at an angle to the spar because of the wings taper with 0.040'' chosen for stiffness and ability to be countersunk All holes are 120 degrees to suit pop rivets
Comment
The tanks will be covered in a separate blog to keep it tidy but they are integral to this process and they were removed and reinstalled too many times for fitting.
There are a number of small items to add and these will all be covered in a final wrap up blog on the wings.
The final word is below - port next but running out of clecos  |
 |
| More on the underside |
No comments:
Post a Comment