many parameters that make for successful kite operating. Similarly, the kite lines for large cargo-ship kite systems need to be carefully designed to hold and operate the kite lines; huge pressures on the reels require that reels be designed to fit the task. Kite lines may be damaged when improperly reeled; twist to the kite line may increase or decrease unwantedly when kite line let out and replaced on the reel incorrectly. The pattern of keeping the kite line on reel cores is given attention by kite operators. De-tensioning kite lines before storing on a reel is done when such is needed for safety and maintenance of kite line integrity. Avoiding excessive twist, burn, pressure accumulation, cutting, tangles, knotting during mooring are important aspects of kite operating; injury and death have resulted from inadequate care for handling kite lines. Lines moored to control bars, masts, poles, stakes, anchors, reels, hooks, etc. mean that the mooring being operated needs to have such parts mechanically sustain integrity during kite operation. The mooring of a kite system requires the line holding mechanisms to be fully able to stay properly operating during all anticipated contingencies of flight sessions. Reels themselves are sometimes involved in special applications like generating electricity. When kiting hang glider for pay-out launching, timing of the reel's release of kite line is very important. Reels powered by scooters are kiting manned hang gliders off flatland. Kite reel patents IMPROVEMENT IN REELS FOR CLOTHES-LINES AND KITE-STRINGS Durene K. Norton, 1874. KITE REEL Wong U. S. Patent:3652027 filing date: Oct 8, 1970. U.S. Patent number: 282620 Filing date: Feb 3, 1883. This mechanism handles a water kite or underwater inverted kite. Reel for flying kites. John C. Gunn. U.S. Patent 274490 of 1883. Reel by Albert M. McGuire. U.S. Patent 850236 Filing date: Aug 28, 1908 Kite reel. U.S. Patent 1067643 Combination kite control and reel device U.S. Patent: 4796827 Filing date: Aug 26, 1987. Kite-string holder. U.S. Patent 1296268 of 1919. KITE REEL by George D. Wanner, 1921. US Pat. 1414237 - Filed Apr 18,1921. Wind drive apparatus for an aerial wind power generation system by Gaylord G. Olson. US Pat. 7275719 - Filed Feb 9, 2007 See also Kite Kite line Kite applications Kite types Hang glider Mooring (watercraft) References Kites