Diamond Tension; Spreader Rake - Nacra F16 Assembly Manual

2.3 diamond tension

1. Put tension on the diamond wires by tightening the mast bolt with an wrench size
17mm. Use the "loose" tension gauge to measure the tension on the diamonds.
Set the tension on 38 (280 KG/280 lbs)
2. After putting tension on the mast check if the mast is straight. Take a look along the
rail from mast base to mast top.
If the mast is bended to starboard:

Unleash the diamond tension

Detach the port diamond wire at the tang and shorten the wire with 1 full
twist clockwise.

Attach the port diamond wire at the tang and put tension on the mast bolt
again. Redo this process if necessary
If the mast is bended to port:

Unleash the diamond tension

Detach the starboard diamond wire at the tang and shorten the wire with 1
full twist clockwise.

Attach the starboard diamond wire at the tang and put tension on the mast
bolt again. Redo this process if necessary
3. Tape the rings of the diamond tang when done.

2.4 spreader rake

Measure the spreaderrake by putting a batten on the diamond stays next to the spreaders. Measure
to the back of the rail
You can easily change the spreader rake by unleashing the tension on the diamonds and
adjusting the spreader tip.
For specified tuning settings, check the
trimsheets on www.nacrasailing.com
NACRA EMPOWERING SAILORS SINS 1975
Tools needed:
- wrench 17mm
- "Loose" tension gauge