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Forestry 2002 75(4):495-500; doi:10.1093/forestry/75.4.495
© 2002 by Institute of Chartered Foresters
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Propelled balloons for harvesting and transporting timber

Mats Hagner1

1 Department of Silviculture, Swedish University of Agricultural Sciences, 901 83 Umeå, Sweden

Studies of conventional tractor-based systems in the tropical rainforest of Malaysia have provided convincing evidence that selective logging with acceptable levels of damage requires the exploitation of air-borne systems. Following consideration of helicopter-based systems as used in Malaysia and procedures involving both balloons and airships in America, a theoretical system based on propelled balloons carrying water as ballast is presented here. In this system, one unit would be used for delimbing standing trees, and another for transporting logs. Such a system could potentially generate a long-term net revenue from the forest estimated at 3.5 times higher than that of a conventional tractor system.


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