Greg I don't know if you've already seen my write-up of my mast step rebuild project on my 30-1 this spring, but in case it's of any help to you, here it is: https://drive.google.com/open?id=0B-NqAxQ6JxFTUlhmbUs4YTZlZnM
Cheers, Randy Stafford S/V Grenadine C&C 30-1 #7 Ken Caryl, CO ----- Original Message ----- From: "Greg Sutherland via CnC-List" <cnc-list@cnc-list.com> To: "cnc-list" <cnc-list@cnc-list.com> Cc: "Greg Sutherland" <bluenosesail...@hotmail.com> Sent: Tuesday, June 27, 2017 9:24:27 AM Subject: Re: Stus-List 33 mk2 Mast step loads Thanks everyone for the info. I spoke with Danny from Klacko spars yesterday and he's certain that he would have installed my original mast in '87. He figures even when falling into a wave with full sails the forces wouldn't exceed 4000 psi. Seems light to me but who am I to argue with him. I thought I notice Mr. Knowles at the club on the weekend so I'll definitely run it past him - thanks for mentioning that. I have the entire mast step "excavated" to the keel and am starting the rebuild. Can't wait for this one to be finished! Thanks! Greg 33 mk2 Halifax On Jun 27, 2017, at 10:52 AM, Della Barba, Joe via CnC-List < cnc-list@cnc-list.com > wrote: I used a total of ½” aluminum on mine when I rebuilt it. It looks about 20 times stronger than the original was too. Joe Coquina CC&C 35 MK I From: CnC-List [ mailto:cnc-list-boun...@cnc-list.com ] On Behalf Of Russ & Melody via CnC-List Sent: Monday, June 26, 2017 9:18 PM To: cnc-list@cnc-list.com Cc: Russ & Melody < russ...@telus.net > Subject: Re: Stus-List 33 mk2 Mast step loads Hi Greg, You can research the righting moment, at say 30 - 33 degrees, for various boats in your size range for a second opinion. The 33-2 is similar in stability to my 35 mk-1(check diagram in the Technical Info on Stu's CNC site). I put the load at about 10,000 lbs, so building for 12 - 15,000 lbs is not a unreasonable. If you're going with aluminum only then I would spec it at 20,000 for a 50% corrosion allowance and say, "I expect this to last another 20 years." BTW, check with Rich Knowles on my credentials, if in doubt. :) Hi Rich, we miss you on the Left Coast. Cheers, Russ Sweet 35 mk-1 At 03:15 AM 26/06/2017, you wrote: <blockquote> Does anyone know what the maximum load would be on the mast step of the 33? I'm trying to figure out the psi force for a rebuild Thanks! Greg 33-2 Halifax _______________________________________________ This list is supported by the generous donations of our members. If you wish to make a contribution to offset our costs, please go to: https://www.paypal.me/stumurray All Contributions are greatly appreciated! </blockquote> <blockquote> _______________________________________________ This list is supported by the generous donations of our members. If you wish to make a contribution to offset our costs, please go to: https://www.paypal.me/stumurray All Contributions are greatly appreciated! </blockquote> _______________________________________________ This list is supported by the generous donations of our members. If you wish to make a contribution to offset our costs, please go to: https://www.paypal.me/stumurray All Contributions are greatly appreciated!
_______________________________________________ This list is supported by the generous donations of our members. If you wish to make a contribution to offset our costs, please go to: https://www.paypal.me/stumurray All Contributions are greatly appreciated!
