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Pondering Seablossom's rig

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  • 21 Mar 2013 14:25
    Quote
    Reply # 1248455 on 1247640
    Deleted user
    David Tyler wrote:
    David Tyler wrote:The only reasons to go to aluminium tube, Jeff, are to save some weight, and to save on the labour of cutting, glueing, shaping and coating  timber. Laminated timber battens will be very strong, and I don't see a need to make the laminations as thin as 5mm. PJR gives scantlings for your length of batten as 50 x 35 in hardwood, 55 x 38 in softwood. If you laminate four pieces of 55 x 9.5, you will get a very strong batten, even if the quality of the timber is not very high.
    Actually, I'd favour a square batten of the same cross sectional area, for the same reasons as I prefer round tubes for battens and yards. I've seen rectangular section battens rotate through 90 degrees when the sail is reefed, so that they can bend upwards at the ends more easily. How about 46mm square, made from four laminations? Easy to get those out of  2" boards.
    Yep, if only 2x4's were 2 real inches.  2" x 4" is alleged to be the "as cut" dimensions, finishes out to 1 1/2 x 3 1/2 inches.
    I say "alleged" because when I was a kid they finished out to 1 3/4 x 3 3/4.  The change set my young feet on the road to cynicism.
    I guess I could halve one to 1 3/4 then cut that into strips to work with.  I'm working with a good band saw that has a small kerf so I won't waste a ton of usable wood.
  • 20 Mar 2013 19:31
    Quote
    Reply # 1247745 on 1247717
    Anonymous member
    Jeff McFadden wrote:
    Jeff McFadden wrote:
    Jonathan Snodgrass wrote:KBO, Jeff, KBO. 
    KISS I know, but KBO is what?
    I see.  In the same family as illegitimi non carborundum. ;p

    But Anglo Saxon, not Latin
  • 20 Mar 2013 19:08
    Quote
    Reply # 1247717 on 1247398
    Deleted user
    Jeff McFadden wrote:
    Jonathan Snodgrass wrote:KBO, Jeff, KBO. 
    KISS I know, but KBO is what?
    I see.  In the same family as illegitimi non carborundum. ;p
    Last modified: 20 Mar 2013 19:15 | Deleted user
  • 20 Mar 2013 17:48
    Quote
    Reply # 1247640 on 1246646
    Anonymous member
    David Tyler wrote:The only reasons to go to aluminium tube, Jeff, are to save some weight, and to save on the labour of cutting, glueing, shaping and coating  timber. Laminated timber battens will be very strong, and I don't see a need to make the laminations as thin as 5mm. PJR gives scantlings for your length of batten as 50 x 35 in hardwood, 55 x 38 in softwood. If you laminate four pieces of 55 x 9.5, you will get a very strong batten, even if the quality of the timber is not very high.
    Actually, I'd favour a square batten of the same cross sectional area, for the same reasons as I prefer round tubes for battens and yards. I've seen rectangular section battens rotate through 90 degrees when the sail is reefed, so that they can bend upwards at the ends more easily. How about 46mm square, made from four laminations? Easy to get those out of  2" boards.
  • 20 Mar 2013 14:30
    Quote
    Reply # 1247462 on 1247398
    Anonymous member
    Jeff McFadden wrote:
    Jonathan Snodgrass wrote:KBO, Jeff, KBO. 
    KISS I know, but KBO is what?

    This is a family web site, and the Moderators are watching.  However, try to Google:  Urban Dictionary:  KBO .  Or KBO and Winston Churchill. 
  • 20 Mar 2013 12:50
    Quote
    Reply # 1247404 on 1247222
    Deleted user
    Paul Thompson wrote:Jeff, Davids two postings above this one say everything that I'd have to say on this subject. I must say though that US$600.00 sounds awfully expensive. I'm pretty sure I'd not pay more than 2/3rds that in NZ and that in NZ$. Maybe you should shop around a bit. On the other hand, if you have the timber and the time, theres no reason not to use it.
    Only about 2/3rds is the actual price of the material.  The rest is shipping.  Big, spread-out country.  I can't (or at least haven't so far) find any long aluminum tubes any closer.  I've got epoxy in stock, *lots* of clamps, and lumber is one thing that's relatively cheap around here.
  • 20 Mar 2013 12:44
    Quote
    Reply # 1247398 on 1247324
    Deleted user
    Jonathan Snodgrass wrote:KBO, Jeff, KBO. 
    KISS I know, but KBO is what?
  • 20 Mar 2013 10:41
    Quote
    Reply # 1247324 on 726309
    Anonymous member
    KBO, Jeff, KBO. 
  • 20 Mar 2013 05:16
    Quote
    Reply # 1247222 on 726309
    Anonymous member
    Jeff, Davids two postings above this one say everything that I'd have to say on this subject. I must say though that US$600.00 sounds awfully expensive. I'm pretty sure I'd not pay more than 2/3rds that in NZ and that in NZ$. Maybe you should shop around a bit. On the other hand, if you have the timber and the time, theres no reason not to use it.
    Last modified: 20 Mar 2013 05:18 | Anonymous member
  • 19 Mar 2013 18:22
    Quote
    Reply # 1246646 on 726309
    Anonymous member
    The only reasons to go to aluminium tube, Jeff, are to save some weight, and to save on the labour of cutting, glueing, shaping and coating  timber. Laminated timber battens will be very strong, and I don't see a need to make the laminations as thin as 5mm. PJR gives scantlings for your length of batten as 50 x 35 in hardwood, 55 x 38 in softwood. If you laminate four pieces of 55 x 9.5, you will get a very strong batten, even if the quality of the timber is not very high.
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