Posted Thursday, November 26, 2009 @ 05:35 PM
The main wing: This is a substantial undertaking and there are a number of steps to complete in preparation. The floor of the rear cockpit consists of the wing center section, and all structures passing through that region has to be disconnected before you can separate the wing and the fuselage.
-Remove the “fillets” (wingrootfairings) and note which screw was seated were, the screws are probably changed and of different size.
-Remove the seats and the stick-base holsters.
-Remove the front and rear stick after disconnecting the PTT-cable (see pic below for the forward stick).
-Disconnect the rudder cables by undoing the turnbuckles on the underside, aft of the wing, visible now that the wing fairing is taken away. Wire the left/right cables together.
-Disconnect the pushrod for the front airbrake (pic above), you have to undo the axle with the insex bolt on the outside to be able to get insex nr 3 + M8 in place. Leave the handle, I also left the pushrod in place. Remove the handle for the rear airbrake, this can be done through the inspection hatch in the belly which you also need to remove. As with the wingfairings, note which screws goes where.
-Disconnect the elevator pushrod from the rear bellcrank at the same location, disconnect the same pushrod from the rear stickbase through the rear belly inspection hole. I couldn´t remove the rod, so I just “parked” it in the torque tube beside the forward elevator pushrod.
-Disconnect the front elevator pushrod from the forward stick and remove the stick, the pushrod can be left in the torque tube. Remove the stickbase from the torque tube, this is much easier than on the RF 4 since the 6 M4 nuts are on the outside of the tube and both the bolts and the nuts can be reached standing beside the cockpit or seated in the wheel well. On “UDI”, the casing aft of the stickbase is mounted with three more bolts easily reached as well. The bearing in the bulkhead holding the torque tube can be left in place, spray some WD-40 or similar so it slides more easily. I have to say that the previous owner (Borås gliding club) did a good job of greasing every moving part of the control system.
-Disconnect the cables from the navigation lights and stallwarning (there is none on “UDI”), it took me some time to find them, they come up from the main wing through a hole in the rear floor just aft of the front seatback- in the picture you can see the hole between the thermos flasks (gust filters for the instrument airpressure).
-As you can see, it´s a good idea to document with pictures BEFORE you start disconnecting cables, this is the rear side of the front backrest. Disconnect the pitot tube at the same location.
-Disconnect the front ruddercables from the rear rudderpedals, a sprint with a cotter pin. In the picture with the navlight cables you can (almost) see the sprints on teh rear rudder pedal, the outer sprint is for the front ruddercables) I pulled the cables forward, hoping that re-routing them will not be too difficult. Unfortunately you can´t leave a string in place, since the wing and fuselage split between those two walls.
-Remove the pitot probe under the left side of the wing to prevent damage. On “UDI”, there is a convenient plexi-window so you can se what you do to the pitot tube, which is easily disconnected from the probe after removing four screws.
-Remove the outriggers, hexbolt accessible through the hole in the wing uppersurface.
Gimme 5b/ Jörgen
[Edit by Jorgen on Friday, November 27, 2009 @ 02:51 PM]
