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Tuning Guides - Etchells On the Water |
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Wind Speed
Upper Tension
Turnbuckle
Lower Tension
Turnbuckle
Mast Sag
Mast Blocks
Mast Step
Backstay
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Light
0-5
Base
2.7
Base
2.4
7/8 in
Level 1
Aft
1/4 inch
Snug |
Light-Medium
6-9
Tighten
3 turns
2.9
Tighten
4 turns
2.6
3/4 in
Neutral
Neutral
Snug
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Medium
10-14
Tighten
6 turns
3.2
Tighten
8 turns
2.9
3/8 in
Level 2
Forward
1/4
Add 2
inches
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Medium-Heavy
15-20
Tighten
9 turns
3.6
Tighten
12 turns
3.3
Zero sag
Level 3
Forward
1/4
Add 4
inches
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Level 1: mast pushed forward with one 1/4 inch block behind mast
Level 2: mast neutral but locked in place
Level 3: mast pushed back with block in front of mast (1/4 gap beteween mast and aft partner)
Level 4: mast fully pushed back with block fully up (no gap between mast and aft partner)
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Upper and lower shroud position and tension |
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Wind Speed
Uppers Tension
Lowers Tension
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0-6
20 tension
hole #2
1" sag
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7-11
23 tension
hole #2
1/2" sag
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12-18
27 tension
hole #2
straight mast
(No sag)
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19+
30 tension
hole #6
Mast will
sag above
spreader
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"Hole number" refers to the chainplate position the the shrouds should be attached to, counting from the front. The lowers should always be in the fourth hole aft on the chainplates. Tension is measured with the Loos Tension gauge Model B.
See Tension Gauge Conversion Chart
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Mast Position in the partners
(measured forward from the back end of the mast partner) |
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True Wind Speed
(knots)
Mast position
at the partners
Mast Step
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0-5
1/2" block
behind mast
Base
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6-9
Mast blocked
1/4" from
back of
partner
Base
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10-15
Mast blocked
1/4" from
back of
partner
1/4" forward
base
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16+
Mast aft
against
partner
1/2" forward
base |
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Mainsail Settings |
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Wind Speed
(knots)
Traveler
Backstay
Top batten angle
Outhaul
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0-6
+10"
56-54"
Open 3
degrees,
tell tales
stalling
50% of
the time
1" from
band
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7-11
+5"
56-54"
Parallel
to close
3 degrees,
top tell
tale stalled
30%
1" from
band |
12-16
Center
54-52"
Parallel
to close
3 degrees,
top tell
flying all
the time
Maximum |
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17-19
-2"
52-50"
Parallel
to close
3 degrees
Maximum |
20+
-6"
49-48"
Open 3-6
degrees
Maximum |
Cunningham should not be used untill 15 knots or more