Detailed Instructions

Tacking Covering to Spar:
Tack the covering to the spar or the high point of the wing,
using your iron as shown (an iron sock is highly
recommended). Gently pull the covering toward the root and
toward the tip, as you work the iron from the center of the
spar to the root and tip of the wing. Press gently with the iron,
allowing the heat (not pressure) to activate the adhesive and
bond the covering to the high point. Ideally, the covering will
naturally lay flat against the entire surface with a minimum of
wrinkles.
Covering a Solid-Sheeted Wing:
If covering a solid-sheeted wing, work from the center of the
spar outward to the trailing edge and then to the leading
edge as shown, using the iron at 220°F. If a wrinkle
develops, the covering can be carefully lifted and reapplied.
Covering an Open-Structure Wing:
If covering an open-structure wing, w
ork from the spar toward
the trailing edge, gently sliding the iron (set at 220°) toward
the trailing edge with the iron contacting two ribs. Using your
iron, adhere the covering to the remaining ribs, working
toward the tip and the root. Now complete the open structure
leading edge, using the same method. If the leading edge is
sheeted, then follow the technique listed above under
“Covering a Solid-Sheeted Wing.”
Sealing the Edges:
With the iron set to 220°F, seal the leading and trailing
edges. Using a straight edge and a sharp #11 hobby knife,
carefully trim the excess covering from the leading and
trailing edge, allowing a minimum of a 1/4" overlap to wrap
around the leading and trailing edge of the wing. Now seal
the leading and trailing edges securely with the covering iron.
Wing Tip:
Depending on the amount of the curvature of the wing tip,
high heat (up to 350°F) may be needed to shrink and stretch
the covering to eliminate all the wrinkles. Preset the iron to
300°F. Pull and stretch the coverin
g around the wing tip while
applying heat with the iron. Remember, UltraCote® can be
carefully lifted and repositioned to help eliminate wrinkles.
This feature is beneficial, especially when covering sharply
curved wing tips. Continue working, pulling, and heating the
covering around the tip until the covering is past the center of
the tip. It may be necessary to increase the temperature of
the iron to achieve greater shrinkage to eliminate all wrinkles.
Trim the excess covering using a #11 hobby knife, then
reseal the covering on the wing tip.
Pro Tip -
If sealing the covering in tight areas such as corners or fillets, using the Hanger 9 ProTrim
Sealing Tool is very helpful and results in a professional finish.