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Utah Soaring Association
One "big strong guy" (or possibly two), lift the wing root out of the cradles on the floor and
bring inward alongside the cradles and begin to extract the wing. (It will likely be
necessary to rotate the wing inward a bit while lifting out of the cradles to provide
the necessary clearance between the trailing edge and the inner roof surface). As
each wing is extracted, closely monitor this clearance. Bringing the wing root inward
toward the trailer centerline will improve the clearance.
With the wing fully extracted, swing the tip 90° and walk to position at the appropriate side
of the glider.
Bring the wing inward to "mate" the lower fitting on the main spar with the fitting on the
fuselage, and insert the pin. The drag spar fitting should also mate at this time, and the pin
for that fitting may also be inserted at that time, or left for later insertion.
Position a wing stand under the tip appropriately adjusted to keep the tip elevated to a near
final position. Keep a person in attendance on the wing tip as the other wing is extracted,
positioned, and "pinned" into the fuselage.
Remove and position the second wing in like fashion stand. Position stand under the tip.
With a person now on each wing tip, "coach" the raising of each tip as necessary to bring
the upper pin hole on each main spar into proper alignment with the top center fixture hole
in the fuselage. Visual alignment is pretty easy and straight forward. Use the
"pop cycle stick" to achieve final alignment - when this assembly tool easily slides
through the hole, and while holding the wingtips steady, remove "pop cycle" and
insert the large, T-handled pin.
Install the drag spar pins (if not already installed) and then insert safety clips in all pins.
Remove the wing tip dollies and aileron locks from each wing.
Rig the ailerons and spoilers with the hardware that is attached by lanyard. It would be a
good idea to have several sets of "eyeballs" involved during this process, as once
the turtle deck is installed, one can no longer visually inspect these fittings.
Installation of the horizontal tail-plane.
Remove the installation pin (installed on the "T-Handle" tool) from its storage position on
the aft frame of the tail-plane trolley. Clean this pin, as well as the two bushings in the top
of the vertical fin, and lightly grease the pin.
Unship the tail-plane trolley from the side of the fuselage and roll rearward to allow
extraction of the tail-plane. Carry the tail plane around and lower the "spike" down into the
vertical fin. Note: It may require a bit of "wiggling" to get the pin on the lower end of the
spike into its socket down inside the vertical fin.
Insert the greased pin fully, and unscrew the "T-Handle" installation tool from the pin.
Return this tool to storage on the tail-plane trolley (either into the clip, or into the vertical
PCV pipe).
Utah Soaring Association
Pilatus B-4
Rigging and De-Rigging
white
plastic
Rev. 00
12/2018
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