However, a reader of The Gatecorrectly pointed out that for application number three in the list above; speed tape was what was used for keeping the wing of an aircraft worthy — as well as for most other external uses on the fuselage.
“We never use, and don’t even stock, duct tape,” explains a veteran airline mechanic in this article written by Patrick Smith of Ask The Pilot. “Some of the tapes we use cost hundreds, even thousands, of dollars per roll. Speed tape is one of those. Last I heard, it costs about $700 per four-inch wide roll. It’s approved by the manufacturer, FAA and company engineering department for certain repairs — always temporary.”
According to this article at wisegeek.com, “Speed tape is an adhesive tape developed for the aviation industry, allowing people to make minor repairs to aircraft with this product to hold components of a plane until more extensive and permanent repairs can be performed.” The components are usually either superficial or not critical to the operation of the aircraft. “This product is an aluminumized tape. It is designed to be able to endure a range of temperatures, expanding and contracting along with the components it is attached to. When aircraft are flying high and conditions are very cold, the tape will shrink and hold its position. In warmer climes, like airports in the tropics, the tape will expand without dislodging.” It can even resist ultraviolet radiation, harsh weather conditions, and the use of solvents.
Although speed tape may be similar in appearance to ordinary duct tape, they are significantly different in terms of their purposes.