G'Day,
I am aware of the multi-drum winches which exist outside Australia, I wish to look at the posibility of emulating their design, as the cost to import a Skylaunch (2 drums), Busio (6 drums) or Supacat (2 drums) is totally cost prohibitive here in Australia.
(I also personally think that twin drums cannot service a large club (of which we are not at the moment!!), I believe the minimum when you have 10 sailplanes sitting on the ground would be 4 drums. This argument would seem to be supported by the section in the reference document: "Calculates effects of multi-reel winch on daily operations".)
Phil, the suggestion about powering the drums using hydraulic motors was something that I considered in thought also, (as well as pnumatics) however before putting time into researching those options, I thought I'd see if there was a viable and economical mechanical solution that could be used.
The link to the document which I am using for my guide, is below, I've shown this to several members of my club, including the gentleman who taught me to drive our Yellow Terror ** and it really is recommended reading.
Further to this is another document called telementary_proposal.pdf also good reading.
http://www.soarcsa.org/pdf/winch_proposal.pdf
http://www.geocities.com/uavbob/electronics/winchtelemetry/csgcproposal.pdf
Cheers
Ronald Marks
Northern Australian GC
**Anyone remember the yellow single drum beast which was located in Woolongong? It's up in Darwin these days - still running, still with 2000m of 7x19... Still with the old truck seat in the cabin... Still with the Ford 302 and 3 speed auto box...
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