Flying Legends P-51D Mustang Manuel d'instruction - Page 5

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Step 5

The elevator horn's position can now be marked out on

the elevator. Use a strip of masking tape to make marking

the elevator easier. Ensure that the slot you mark is offset

slightly outboard when compared to the servo output horn

to allow for the balljoint width and is positioned to ensure

the control horn aligns with the hinge centreline.

Step 6

Using a small file or rotary cutting disc prepare a suitable

close-fitting slot for the control horn. The slot should be

the full depth of the elevator to the underside of the top

elevator skin, but not through the skin. Take great care not

to cut too deeply and mark the top surface of the elevator.

Step 7

Roughen the base of the elevator horn with coarse

sandpaper. Glue the horn in place using Hysol or 30

minute epoxy ensuring it is firmly seated in its slot and at

90° to the elevator. Ensure that the horn is vertical - not

leaning to one side - and that the balljoint hole is directly

above the pivot rod of the elevator. Allow glue to fully cure.

Step 8

Centre the elevator and the elevator servo and make up

the supplied linkage using the 3mm steel elevator pushrod

with an aluminium ball link at the elevator and steel clevis

with a locknut at the servo control horn. Don't omit the

fitting of a fuel tubing retainer to the clevis.

Repeat all the above steps for the second elevator taking

care to ensure that you work on the underside of the

tailplane.