Tuning Notes 11-17-2017

Here are tuning notes from 11/17/2017:

1. Mast butt-possibly move forward 5mm
2. Loos gauge @22 for 250 lbs on stainless wire shrouds.
3. Lower mast marked in red to the center of the tension block.
4. Shrouds - no play in them; measure with a square to balance left to right angle sweep.
5. Spreader length - set at 445mm - very heavy crew weight.  Target is 435 for heavy.  Longer is stiffer.
6. Sweep is 185, vs 190, Nick thinks even stiffer
7. In hiking conditions, head stay tight!
8. To tighten head stay, more ram to straighten the mast.
9. Tight headstay keeps the slot open
10. Reduce shackle on jib tack - smaller, lower the sail.

Kestrel Tuning from Turney Sailing
Larry's hand written notes
SuperNova Tuning from Turney Sailing

Dyneema under tension with a Loos gauge

I hung dumbbells from the ceiling rafters of my garage with 1/8" dyneema.

I did this with 250lbs, 220lbs, 190lbs, 160lbs, 130lbs.  Below are the pictures showing how this test registered on a Loos Gauge.  I measured 275lbs and 300lbs on 3/16.2018.  Results were consistent in Nov 2017, Jan 2018 and Feb 2018 with different dyneema line: