Wings - WACO YMF F5 Series Maintenance Manual

safety all components. The elevator up travel should be 33 +/- 2 degrees and may be adjusted by varying
the length of the stop tube welded to the fin post.
For aircraft with a down stop at the elevator horn, set the down stop at 23 +/- 1 degree down and the up
stop at 33 +/- 2 degrees up. Adjustment is made by varying the length of the stop tubes welded to the fin
post. Then adjust the turnbuckles to position the control stick to the desired location. Reset cable tension
and safety all components.
Install the fin by inserting the fin into the tail post, bolting it in place with a bolt just above the lower rudder
hinge. Bolt the front of the fin to the bracket on the stabilizer support tubes.
Lubricate all working parts as detailed on Lubrication Chart. Inspect carefully all nuts and cotter keys and
then install tail cowl, screwing in place using screws and holes provided for same.
Attach the top and bottom tail wires to the stabilizer. The bottom wire is the shorter one. The clip on the
stabilizer end of the top tail wire is more nearly straight than that on the upper end. Tighten the tail wires,
being careful that the stabilizer is kept straight. When properly adjusted, both bottom wires will be
approximately the same length and both top wires the same length. Check by eye to see that the fin post
is perpendicular to the top of the fuselage and the stabilizer is parallel to the top of the fuselage.
Alignment of the rudder hinge bearings is controlled by the adjustment of the upper tail wires for side to
side alignment and by varying the engagement in and out for fore and aft alignment. Using a straight
edge along the side and back of the bearings, check the alignment and make any adjustments necessary.
Set the upper brace wire tension to 500 +/- 50 pounds. Secure all check nuts and safeties. Add a drop of
soft loctite to rudder hinge bearing shank threads after completing adjustments.
The rudder may now be attached to bearings on fin post. Attach the rudder cable turnbuckles to the
rudder horn and adjust turnbuckles until rudder action from stop to stop gives comfortable pedal action.
The rudder should be checked for travels of 30 +/- 2 degrees right and left. If adjustment is required, vary
the length of the stop tubes on the fin post as required. When the rudder rigger is complete, attach the
tail wheel steering cables and again check operation. Lubricate all working parts to complete the
installation.
6.4

WINGS

6.4.1 ASSEMBLY INSTRUCTIONS
Rights and lefts are determined while standing at the tail and looking toward the nose of the airplane.
Bolts and clevis pins should be installed with heads up, forward and outboard. Make it a practice to tighten
the nut and insert the cotter key on each bolt as used, never leaving any finishing process to be done at a
later date. This will avoid the possibility of leaving out the very important cotter keys.
(A) Wing Installation and Rigging
For the assembly and rigging of your airplane we recommend the following procedure:
Jack the airplane, remove the pants and wheels, then lower the axles onto secure blocking. Check the
fuselage for level laterally by using a level across the cockpit floor. Adjust as required to level by
shimming the blocking under the axles. All blocking must be solid and secure as some bumping and
shaking will occur during wing installation.
Cabane Installation
Attach cabane struts to the eyebolts in the top longerons. Attach wing center section to the top of the
cabane struts. Next, check to ascertain that the incidence is 0 degrees. To do this, compare the angle of
the top fuselage longeron under the stabilizer with the bottom surface of the center section between the
spars. They should be the same. If not, it will be necessary to adjust the center section angle by
relocating the washers on the upper longeron eyebolts as required.
When the incidence is correct, secure all eyebolts and strut bolts. Next install the flying wires being sure
to have both end fittings equally engaged. Hang a plumb line from each front wing attach fitting on the
REVISION: H
RELEASED: 07/21/2017
WACO Classic Aircraft Corporation
YMF WACO F5 SERIES MAINTENANCE MANUAL
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PART NO. YMFAMM-1