Dear All After some research into our proposed method of pulley launching we are confident it will work however we still want to take precautions in case things don't go as planned. The reverse pulley system using wire seems a proven and very efficient way of getting maximum height out of any strip other than using aerotow. However we inend to use rope and multiple pulleys so that we can launch a glider on a long distance flight after an outlanding (akin to a mobile winch). The pulleys should give the system plenty of legs to reel in the rope promptly if the rope goes slack due to rope stretch.
Issues we are thinking about at the moment include: how to deal with too much tension coming on at the wrong time, or not enough tension. How about the weight and drag of 10 mm rope especially over 1.8 kms or more ? What about using lighter weight rope ? We are thinking of using 6 mm cray pot rope? (cheaper, less stretchy and more hard wearing than poly propelyne) We would be particularly pleased to hear from anyone using a rope winch ! Regards Michael Derry Pulley Launch group Western Australia _______________________________________________ Aus-soaring mailing list Aus-soaring@lists.internode.on.net To check or change subscription details, visit: http://lists.internode.on.net/mailman/listinfo/aus-soaring
