I think this is getting confusing, some numbers in this discussion are pounds per square inch hydraulic pressure, rather than say, 2,000 pounds of hanging load. I would certainly not have wanted to put 4,000# of actual load on my 39’s backstay. Imagine a 2’ X 2’ X 7’ concrete pier block hanging on that.
Bill Coleman Erie PA From: CnC-List [mailto:cnc-list-boun...@cnc-list.com] On Behalf Of Bailey White via CnC-List Sent: Friday, June 12, 2020 1:45 PM To: cnc-list@cnc-list.com Cc: Bailey White Subject: Re: Stus-List Back stay tension clarification Happy Friday to everyone. I've enjoyed the discussions this week. 2000 psi on a hydraulic backstay for a large keelboat is not very much and seems overly conservative to me, particularly with the large headsails that many of our boats have. We used to routinely go to 4000 psi on a 33 foot Santa Cruz ULDB routinely when I raced in San Francisco Bay. Bigger boats, much more. North Sails recommends 4300 psi for a J/35 in 14 knots true as another example. http://www.j35-fleet7.com/training/training_tuning_NorthSails_guide.pdf I try to not push too hard on my 1979 C&C 36 but go to 2500 to get the headstay closer to where I would expect it in heavy air cruising. I suspect it would be just right at 4000 but I have not raced this boat in anger enough to do that. best, Bailey White C&C 36 Lake Lanier, GA
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