• Lateral pitch adjustment

    From palinurus@24:150/2 to rec.sport.rowing on Thu Oct 1 02:26:29 2020
    Trying to to fix some out of whack lateral pitch on some apparently bent riggers. The riggers seem to display somewhat severe droop, meaning at the pin I measure 4-# of lateral pitch, where we're looking for 0-#.
    So far I've tried shims under the pin from an old beer can: can get the pin straight, but upon tightening the bottom nut it squeezes these shims out a bit, and after a couple of rows some of the shims have worked themselves out entirely.
    My second idea is angled shims in between the rigger and the hull, to raise the pin slit (?) back to horizontal. (This would also have the affect of raising the pin vertically, but I think we have enough height adjustment on the pin to still work). Either that or grind down some plastic washers to have an angled surface, and place these on the base of the pin. Has anyone had success with these methods?
    The pins appear straight, but very reluctant to start bending pins, especially to 4-#. Of course the ideal is a shiny new set of riggers that aren't bent to hell and back (or some of Carl's axior pins) but looking for a solution in the meant time?
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  • From bnw...@gmail.com@24:150/2 to rec.sport.rowing on Thu Oct 1 06:05:26 2020
    On Thursday, October 1, 2020 at 5:26:31 AM UTC-4, palinurus wrote:
    Trying to to fix some out of whack lateral pitch on some apparently bent riggers. The riggers seem to display somewhat severe droop, meaning at the pin I measure 4-# of lateral pitch, where we're looking for 0-#.

    So far I've tried shims under the pin from an old beer can: can get the pin straight, but upon tightening the bottom nut it squeezes these shims out a bit, and after a couple of rows some of the shims have worked themselves out entirely.

    My second idea is angled shims in between the rigger and the hull, to raise the pin slit (?) back to horizontal. (This would also have the affect of raising the pin vertically, but I think we have enough height adjustment on the pin to still work). Either that or grind down some plastic washers to have an angled surface, and place these on the base of the pin. Has anyone had success with these methods?

    The pins appear straight, but very reluctant to start bending pins, especially to 4-#. Of course the ideal is a shiny new set of riggers that aren't bent to hell and back (or some of Carl's axior pins) but looking for a solution in the meant time?
    I had a sim situation. I placed a sst fender washer in silicone caulk against the hull at all 3 bolts and adjusted the bottom from there with additional std sst washers as req'd. I probably should have re-checked the pitch of the oarlock, but did not. I believe Carl offers tapered shims on his site...
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    * Origin: SportNet Gateway Site (24:150/2)
  • From rivcy...@gmail.com@24:150/2 to rec.sport.rowing on Sat Oct 3 14:19:58 2020
    On Thursday, October 1, 2020 at 2:26:31 AM UTC-7, palinurus wrote:
    Trying to to fix some out of whack lateral pitch on some apparently bent riggers. The riggers seem to display somewhat severe droop, meaning at the pin I measure 4-# of lateral pitch, where we're looking for 0-#.

    So far I've tried shims under the pin from an old beer can: can get the pin straight, but upon tightening the bottom nut it squeezes these shims out a bit, and after a couple of rows some of the shims have worked themselves out entirely.

    My second idea is angled shims in between the rigger and the hull, to raise the pin slit (?) back to horizontal. (This would also have the affect of raising the pin vertically, but I think we have enough height adjustment on the pin to still work). Either that or grind down some plastic washers to have an angled surface, and place these on the base of the pin. Has anyone had success with these methods?

    The pins appear straight, but very reluctant to start bending pins, especially to 4-#. Of course the ideal is a shiny new set of riggers that aren't bent to hell and back (or some of Carl's axior pins) but looking for a solution in the meant time?
    There are also the Carl Douglas "Axior" pins that help correct both stern and lateral pitch. My old shell that I purchased has a pair, and they're great, I can easily modify pitch both in and out along both axes.
    --- SBBSecho 3.06-Win32
    * Origin: SportNet Gateway Site (24:150/2)
  • From Phil@24:150/2 to rec.sport.rowing on Sun Oct 4 15:57:09 2020
    On Thursday, October 1, 2020 at 10:26:31 PM UTC+13, palinurus wrote:
    Trying to to fix some out of whack lateral pitch on some apparently bent riggers. The riggers seem to display somewhat severe droop, meaning at the pin I measure 4-# of lateral pitch, where we're looking for 0-#.

    So far I've tried shims under the pin from an old beer can: can get the pin straight, but upon tightening the bottom nut it squeezes these shims out a bit, and after a couple of rows some of the shims have worked themselves out entirely.

    My second idea is angled shims in between the rigger and the hull, to raise the pin slit (?) back to horizontal. (This would also have the affect of raising the pin vertically, but I think we have enough height adjustment on the pin to still work). Either that or grind down some plastic washers to have an angled surface, and place these on the base of the pin. Has anyone had success with these methods?

    The pins appear straight, but very reluctant to start bending pins, especially to 4-#. Of course the ideal is a shiny new set of riggers that aren't bent to hell and back (or some of Carl's axior pins) but looking for a solution in the meant time?
    Ally riggers? Big steel pipe over the pin & some gentle 'persuasion'. Or the tapered spacers made for just such a problem. Available most rowing accessory vendors.
    Phil.
    --- SBBSecho 3.06-Win32
    * Origin: SportNet Gateway Site (24:150/2)
  • From carl@24:150/2 to rec.sport.rowing on Mon Oct 5 09:32:46 2020
    On 01/10/2020 10:26, palinurus wrote:
    Trying to to fix some out of whack lateral pitch on some apparently bent riggers. The riggers seem to display somewhat severe droop, meaning at the pin I measure 4-# of lateral pitch, where we're looking for 0-#.

    So far I've tried shims under the pin from an old beer can: can get the pin straight, but upon tightening the bottom nut it squeezes these shims out a bit, and after a couple of rows some of the shims have worked themselves out entirely.

    My second idea is angled shims in between the rigger and the hull, to raise the pin slit (?) back to horizontal. (This would also have the affect of raising the pin vertically, but I think we have enough height adjustment on the pin to still work). Either that or grind down some plastic washers to have an angled surface, and place these on the base of the pin. Has anyone had success with these methods?

    The pins appear straight, but very reluctant to start bending pins, especially to 4-#. Of course the ideal is a shiny new set of riggers that aren't bent to hell and back (or some of Carl's axior pins) but looking for a solution in the meant time?


    Or - some beautiful, made-to-measure, hard-anodised AeRoWing riggers,
    complete with our AxioR pins? Very much _not_ bendable.

    The problem with bending riggers to correct pitch errors is that
    deforming aluminium leaves it with high residual stresses. Under the
    cyclic loads of rowing that encourages eventual fatigue failure. Small
    bends = small problems; big bends = bigger problems. But you must do
    what you have to do for now.

    Cheers -
    Carl

    --
    Carl Douglas Racing Shells -
    Fine Small-Boats/AeRoWing Low-drag Riggers/Advanced Accessories
    Write: Harris Boatyard, Laleham Reach, Chertsey KT16 8RP, UK
    Find: tinyurl.com/2tqujf
    Email: carl@carldouglasrowing.com Tel: +44(0)1932-570946 Fax: -563682
    URLs: carldouglasrowing.com & now on Facebook @ CarlDouglasRacingShells

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  • From Richard@24:150/2 to rec.sport.rowing on Mon Oct 5 12:13:41 2020
    On Monday, 5 October 2020 at 09:33:12 UTC+1, carl wrote:
    Or - some beautiful, made-to-measure, hard-anodised AeRoWing riggers, complete with our AxioR pins? Very much _not_ bendable.
    Shirely everything metal is bendable *eventually*... ;-P
    Reminds me of the apocryphal postman who, when delivering some photographs in a card-backed envelope clearly marked "PHOTOGRAPHS - DO NOT BEND", wrote on the envelope "oh yes they do", then folded it neatly in half and popped it through the recipient's letterbox.
    I so want that to be true.
    --- SBBSecho 3.06-Win32
    * Origin: SportNet Gateway Site (24:150/2)
  • From carl@24:150/2 to rec.sport.rowing on Tue Oct 6 11:58:23 2020
    On 05/10/2020 20:13, Richard wrote:
    On Monday, 5 October 2020 at 09:33:12 UTC+1, carl wrote:

    Or - some beautiful, made-to-measure, hard-anodised AeRoWing riggers,
    complete with our AxioR pins? Very much _not_ bendable.

    Shirely everything metal is bendable *eventually*... ;-P

    Reminds me of the apocryphal postman who, when delivering some photographs in a card-backed envelope clearly marked "PHOTOGRAPHS - DO NOT BEND", wrote on the envelope "oh yes they do", then folded it neatly in half and popped it through the recipient's letterbox.

    I so want that to be true.

    OK, I asked for that one! Everything is relative :) And there are
    those who, like your apocryphal postie, who see any indication that care
    is needed as a personal insult, or a challenge to their manhood.

    Show me the rower who doesn't like to re-tighten every nut in the boat
    before a race. Unfortunately, stainless steel is a lot softer than the high-tensile steel for which the typical spanner/wrench is designed, so
    a hearty re-tightening can result in a bolt weakening & subsequent
    failure in use. That may have been the case when, in 2019, the wing
    rigger on Belarus para sculler Dzmitry Ryshkevic's boat broke away,
    tipping him out & resulting in his death.

    By "not bendable" I meant that to bend them is extremely difficult, that
    any resulting change is likely to disappoint and that, if the attempt is
    taken to that extreme, the outcome will not be as intended nor undoable.

    What enfeebles a welded aluminium rigger is the welds. The heat to melt
    the weldment softens the metal while the weld pool contraction on
    cooling generates high local stresses. Which is why our riggers are not welded but are assembled using modern adhesives, similar to those used
    in the assembly of automobiles and aircraft.

    Cheers -
    Carl

    --
    Carl Douglas Racing Shells -
    Fine Small-Boats/AeRoWing Low-drag Riggers/Advanced Accessories
    Write: Harris Boatyard, Laleham Reach, Chertsey KT16 8RP, UK
    Find: tinyurl.com/2tqujf
    Email: carl@carldouglasrowing.com Tel: +44(0)1932-570946 Fax: -563682
    URLs: carldouglasrowing.com & now on Facebook @ CarlDouglasRacingShells

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