Hangar 9 Sukhoi SU-31, Инструкция по эксплуатации

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Step 9. Using a ruler, measure 1/2" from the folded crease and
mark the pieces with a pen.
Step 10. Using a sharp hobby knife with a #11 blade and
straight edge, carefully cut through both layers of UltraCote ®
covering at the 1/2" point marked in the previous step. Cut
both pieces.
Step 11. Mark and cut both folded coverings to an overall
length of 33
3
/
4
". These pieces will be inserted and ironed down
into the hinge bevel on the bottom of the ailerons.
Step 12. Remove the backing from one piece of the UltraCote.
Place the folded crease side to the center of the hinge line on the
bottom of one wing half. Deflect the aileron full up and using a
straight edge as shown, hold one side of the covering in place
while ironing down the opposite side with a sealing iron. We
recommend setting the iron temperature to 320° for this operation.
Step 13. Place the straight edge over the hinge line covering
that you just ironed down in the previous step. With the edge
of the straight edge placed firmly at the bottom of the hinge line
as shown, iron down this side of the covering, making sure the
aileron is fully deflected.
Step 14. Repeat Steps 12 and 13 for the other aileron gap seal.